https://www.smithnet.org.uk/wiki/api.php?action=feedcontributions&feedformat=atom&user=NickPGSmith 2026-06-11T08:39:30Z User contributions MediaWiki 1.43.1 https://www.smithnet.org.uk/wiki/index.php?title=Running&diff=1764 2026-06-11T06:59:51Z

<p>NickPGSmith: /* 10 mile (16 km) */</p> <hr /> <div>== Distances ==<br /> <br /> See [https://www.calculator.net/pace-calculator.html Pace Calculator].<br /> <br /> === 5 km ===<br /> <br /> * [https://www.parkrun.org.uk/parkrunner/6454631/all/ All Parkruns]<br /> <br /> {| class=&quot;wikitable&quot;<br /> !Date<br /> !Location<br /> !Time<br /> !Pace (min/km)<br /> !Notes<br /> |-<br /> |2023-08-12||[https://www.parkrun.org.uk/swanseabay/parkrunner/6454631/ Swansea Bay Parkrun]||19:27||3:53||<br /> |-<br /> |2024-05-11&lt;/br&gt;2026-04-27||[https://www.parkrun.org.uk/southnorwood/parkrunner/6454631/ South Norwood Parkrun]||19:55||3:59||<br /> |-<br /> |2024-06-29||[https://www.parkrun.org.uk/crystalpalace/parkrunner/6454631/ Crystal Palance Parkrun]||20:43||4:09||<br /> |-<br /> |2024-07-27||[https://www.parkrun.org.uk/bromley/parkrunner/6454631/ Bromley Parkrun]||20:27||4:05||<br /> |-<br /> |2025-03-01||[https://www.parkrun.org.uk/medina/parkrunner/6454631/ Medina IOW Parkrun]||22:04||4:25||<br /> |-<br /> |2025-08-17||[https://results.runthrough.co.uk/myresults.aspx?uid=16487-5495-2-25249 Dulwich Park]||19:58||4:00||13th Overall, 1st in V50 category&lt;br/&gt;Pacer V2<br /> |}<br /> <br /> Target: 20:00 (4:00 min/km)<br /> <br /> === 10 km ===<br /> <br /> {| class=&quot;wikitable&quot;<br /> !Date<br /> !Location<br /> !Time<br /> !Pace (min/km)<br /> !Notes<br /> |-<br /> |2025-01-19||Regent's Park||43:03||4:18||2 weeks off/with injury. Metaspeed, cool.<br /> |-<br /> |2025-06-18||[https://results.netiming.co.uk/results.aspx?CId=20008&amp;RId=465 Norman Park]||44:18||4:26||32nd of 292 overall. Pacer V2, Very hot.<br /> |-<br /> |2025-08-24||[https://results.runthrough.co.uk/myresults.aspx?CId=16487&amp;RId=5504&amp;EId=1&amp;AId=1103850 Regent's Park]||41:57||4:12||18th of 362 overall. Metaspeed, warmish.<br /> |-<br /> |2026-06-14||[https://www.orpingtonroadrunners.org.uk/high-elms-10k High Elms]|| || ||<br /> |-<br /> |}<br /> <br /> Target: 42:00 (4:12 min/km)<br /> <br /> === 10 mile (16 km) ===<br /> <br /> {| class=&quot;wikitable&quot;<br /> !Date<br /> !Location<br /> !Time<br /> !Pace (min/km)<br /> !Notes<br /> |-<br /> |2026-06-07||[https://results.racetimingsolutions.co.uk/myresults.aspx?CId=16269&amp;RId=24211&amp;EId=2&amp;AId=231951 Dorking]||1:08:30||4:15||Metaspeed, cool/slight wind, undulating.<br /> |-<br /> |}<br /> <br /> Target: 1:09:00 (4:17 min/km)<br /> <br /> === Half (21.1 km) ===<br /> <br /> {| class=&quot;wikitable&quot;<br /> !Date<br /> !Location<br /> !Time<br /> !Pace (min/km)<br /> !Notes<br /> |-<br /> |2023-09-03||London [https://www.thebighalf.co.uk/ Big Half]||1:36:57||4:36||Hot<br /> |-<br /> |2024-09-01||London Big Half||1:32:20||4:23||Hot<br /> |-<br /> |2025-09-07||London Big Half||1:32:06||4:22||Warm. On 1:30 pace until halfway, legs tiring.&lt;br/&gt;Insufficient training at race pace?<br /> |-<br /> |2026-09-06||London Big Half|| || ||<br /> <br /> |}<br /> <br /> Target: 1:30:00 (4:16 min/km)<br /> <br /> Notes from BH:<br /> * Pre-race warmup walk<br /> * Fueling plan<br /> * Plan point of sprint finish earlier<br /> <br /> === Marathon (42.2 km) ===<br /> <br /> {| class=&quot;wikitable&quot;<br /> !Date<br /> !Location<br /> !Time<br /> !Pace (min/km)<br /> !Notes<br /> <br /> |-<br /> |2022-05-01||[https://mkmarathon.com/ Milton Keynes]||3:53:00||5:31||Cramp near end: no fueling plan.<br /> |-<br /> |2023-05-01||Milton Keynes||3:34:04||5:04||<br /> |-<br /> |2024-05-06||Milton Keynes||3:21:04||4:46||<br /> |-<br /> |2025-05-05||Milton Keynes||3:40:21||5:13||After injury: insufficient long runs.&lt;br/&gt;Cool, 5 Gells/tablets/2 caffine&lt;br/&gt;Severe cramp in last 6 km<br /> |-<br /> |2025-10-18||[https://results.runthrough.co.uk/myresults.aspx?uid=16487-5587-6-56342 Battersea Park]||3:19:58||4:44||Cool, flat. 4 Gells + Sweets.Achillies niggle, New Balance&lt;br/&gt;Bad blisters, cramp after finish<br /> |-<br /> |2026-04-12||Brighton||3:29:04||4:57||Superblast 2 (Sunny but not too hot, light wind). Only 2 weeks intensive (100+k) after Achilles recovery. Needed to walk at water stations with cups. Fueling: good gel use, 2 caffeine tabs, 2 electrolyte tabs. Steady heart rate. Started to get cramp in last 5 km, very bad (needed to run/walk) in last 2 km.<br /> [https://www.londonmarathonevents.co.uk/sites/default/files/2025-03/BRTN_2025_Road_Closure_Map_v4%201.pdf Map]<br /> |-<br /> |2026-05-04||[https://results.resultsbase.net/myresults.aspx?CId=8&amp;RId=21049&amp;EId=1&amp;AId=81587 Milton Keynes]||3:18:04||4:41||Cool, steady pace, Metaspeed Sky +, good gel/electrolytes, no cramp until a little crossing the finish.<br /> [https://www.mapmyrun.com/routes/view/5974644058 Map]<br /> |-<br /> |2026-10-24||Battersea Park|| || ||<br /> |-<br /> |2027-04-18||Newport|| || ||<br /> |-<br /> <br /> |}<br /> <br /> Targets:<br /> * 3:30:00 (4:59 min/km) <br /> * 3:20:00 (4:44 min/km)<br /> * 3:15:00 (4:37 min/km)<br /> <br /> == Training ==<br /> <br /> * Polarised Training:<br /> ** Mostly consistent slow runs, high volume<br /> ** Speed work at Parkrun and track. <br /> * Taper<br /> ** 2 - 3 weeks unnecessary if comfortable with prior volume, so used to recovering.<br /> ** Reduce volume but maintain intensity<br /> * Sprints<br /> ** Hill sprints develop power; high cadence/look up not down<br /> ** Sprint training should be done not to exhaustion: multiple short bursts to engage fast twitch muscles<br /> * Alternate:<br /> ** 2 weeks High Load (100+ km)<br /> ** 1 week De-load<br /> ** Vary according to feel, additional races<br /> ** Do not attempt full send Parkrun every week<br /> * Be more specific closer to the race<br /> * 2 Weeks from Marathon, peak with race-specific effort:<br /> ** 10 k easy / 15-20 km @ race pace (4:37 min/km)<br /> ** 4 x (5 km @ race pace + 1 km easy)<br /> <br /> {| class=&quot;wikitable&quot;<br /> ! !!Mon!!Tue!!Wed!!Thu!!Fri!!Sat!!Sun<br /> <br /> |-<br /> |High Load<br /> |18 km<br /> |AM: 9 - 18 km;&lt;br/&gt;PM: Track, Max effort<br /> |12 km<br /> |18 km<br /> |Rest / S&amp;C<br /> |21 - 37 km<br /> |Rest / 8.5 km depending on previous day<br /> |-<br /> |De-Load<br /> |8 km hill<br /> |AM: 5 km;&lt;br/&gt;PM: Track, Max effort<br /> |9 km<br /> |12 km<br /> |Rest / S&amp;C<br /> |''Parkrun'' 2 - 3 km warmup; 5 km race<br /> |Rest / S&amp;C<br /> <br /> |}<br /> <br /> Distances:<br /> * ~ 6 km : 2 loops around SN Park<br /> * 9 km : Beckenham J - Penge E<br /> * 12 km : to BP Park<br /> * ~ 12.5 km : CPalace - Sydenham - Beckenham J<br /> * ~ 19 km : Elmers - Shirley - WWickham - Beckenham<br /> * ~ 21.6 km : Grenwich observatory and back<br /> * ~ 23 km : Elmers - Shirley - WWickham - Beckenham J with BP Park loop<br /> * ~ 29.3 km : To SB, Grenwich observatory and back<br /> * ~ 31.5 km : Elmers - Shirley - WWickham - Beckenham (and repeat with shortcut)<br /> <br /> S/C Excercises:<br /> * Calf Raise<br /> * Bench Lunge<br /> * Plank<br /> * Side Plank<br /> * Toe Walk<br /> * Heel Walk<br /> <br /> Form:<br /> * Check, especially when tired<br /> * Stop flapping arms about<br /> * Don't slouch forward<br /> <br /> == Shoes ==<br /> <br /> Current:<br /> * ASICS Metaspeed Sky+ (204 g) [2023-12]: Important Races: Half/Marathon. Carbon Plate.<br /> * ASICS Novablast 5 (260 g) [2025-01]: Everyday, Easy, Parkrun.<br /> * ASICS Nimbus 27 (300 g) [2025-04]: Extra cushioned, long runs.<br /> * New Balance FuelCell SuperComp Pacer V2 (209 g) [2025-05]: Important Races: 5k/10k. Carbon Plate.<br /> ** Half size up, but still too tight for long runs.<br /> * ASICS Gel Pulse 15 (260 g) [2025-09]: Walking, light runs.<br /> * ASICS SuperBlast 2 (250 g) [2026-01]: Tempo, Track, more cushioned for Half/Marathon.<br /> * Scott Supertrac RC 2 Trail (270 g) [2026-01]: Cross-Country.<br /> ** 1 size up<br /> <br /> Consider:<br /> * ASICS Metaspeed Sky/Edge Tokyo (188 g, £240): Races/speed<br /> * ASICS MegaBlast (230g, £210): Fast non-plate<br /> * ASICS Metaspeed Ride (282 g, £180)<br /> * ASICS Sonicblast Tokyo (256 g, *£170): Plate version of novablast? Tempo?<br /> * ASICS Magic Speed 4 (242 g, £160 - 15%): Plate, tempo/speed work.<br /> * ASICS Novablast 5 (260 g, *£135)<br /> * ASICS Trabuco 14 (* £140): Trail<br /> * Li-Ning Eedian 6 Elite (~200 g): Races<br /> * Li-Ning Eedian 6 Challenger (~200 g): Propulsion and stability<br /> <br /> Retired:<br /> * ASICS NovaBlast 3 (252 g) [2023-07]: Tempo/Track/Parkrun<br /> * Saucony Mens Ride 17 (282 g) [2024-03]: Easy Run, Daily<br /> * ASICS Cumulus<br /> * ASICS Nimbus 22<br /> * ASICS Nimbus 24 [2023-07]<br /> <br /> == Research ==<br /> <br /> * [https://www.researchgate.net/profile/Malcolm-Collins/publication/49674432_Increased_running_speed_and_previous_cramps_rather_than_dehydration_or_serum_sodium_changes_predict_exercise-associated_muscle_cramping_A_prospective_cohort_study_in_210_Ironman_triathletes/links/0a85e53c93b820db45000000/Increased-running-speed-and-previous-cramps-rather-than-dehydration-or-serum-sodium-changes-predict-exercise-associated-muscle-cramping-A-prospective-cohort-study-in-210-Ironman-triathletes.pdf Increased running speed and previous cramps rather than dehydration or serum sodium]<br /> <br /> == YouTube ==<br /> <br /> Runners:<br /> * [https://www.youtube.com/@BenParkes Ben Parkes]<br /> * [https://www.youtube.com/@thisisjogon Jog On]<br /> * [https://www.youtube.com/@kofuzi Kofuzi]<br /> * [https://www.youtube.com/@justalilbester Nick Bester]<br /> * [https://www.youtube.com/@PhilyBowden Phily Bowden]<br /> * [https://www.youtube.com/@RanToJapan Ran To Japan]<br /> * [https://www.youtube.com/@runningchannel The Running Channel]<br /> <br /> Physio/Coach:<br /> * [https://www.youtube.com/@SpringSnabbare Fredrik Zillén]<br /> * [https://www.youtube.com/@NicklasRossnerPT Nick Rossner]<br /> * [https://www.youtube.com/@runelitecoach Run Elite]<br /> * [https://www.youtube.com/@TheRunExperience The Run Experience]<br /> * [https://www.youtube.com/@SteveMagness Steve Magness]<br /> <br /> == Diet &amp; Supplements ==<br /> <br /> * Eat at least 2 hours before a race<br /> * Marathon/Half:<br /> ** Start taking carbs 20 mins after the start of a race<br /> ** At least 60 g / hour<br /> ** SiS GO Isotonic: 22 g carbs (general training)<br /> ** SiS Beta: 40 g carbs (important long races)<br /> * Reduce oil intake which reduces nitric oxide<br /> * Nitric oxide rich foods: rhubarb, celery, lettuce, beetroot, watermelon<br /> * Sodium<br /> ** Suggested 300 - 600 mg/hr; up to 1 g/hr on very hot days.<br /> ** 2 tablets: 200 mg<br /> * Caffeine<br /> ** 3 - 6 mg/kg -&gt; ~ 400 mg (2 tablets)<br /> ** ~ 30 - 60 mins prior to race<br /> ** ~ 6 hours half life<br /> * Turmeric<br /> ** Taken after exercise, can help with DOMS/recovery/anti-inflammatory<br /> ** Eat with black pepper or fat to aid absorption<br /> * Creatine Monohydrate<br /> ** 5 - 10 g daily<br /> * Magnesium Glycinate<br /> ** 3 g daily<br /> * Collagen<br /> ** 10 - 15 g of hydrolyzed collagen peptides<br /> ** Collagen synthesis is dependent on Vitamin C<br /> ** 30 – 60 mins before strength training<br /> ** Do not take caffeine beforehand</div>

NickPGSmith https://www.smithnet.org.uk/wiki/index.php?title=Running&diff=1763 2026-06-11T06:57:47Z

<p>NickPGSmith: /* 10 mile (16 km) */</p> <hr /> <div>== Distances ==<br /> <br /> See [https://www.calculator.net/pace-calculator.html Pace Calculator].<br /> <br /> === 5 km ===<br /> <br /> * [https://www.parkrun.org.uk/parkrunner/6454631/all/ All Parkruns]<br /> <br /> {| class=&quot;wikitable&quot;<br /> !Date<br /> !Location<br /> !Time<br /> !Pace (min/km)<br /> !Notes<br /> |-<br /> |2023-08-12||[https://www.parkrun.org.uk/swanseabay/parkrunner/6454631/ Swansea Bay Parkrun]||19:27||3:53||<br /> |-<br /> |2024-05-11&lt;/br&gt;2026-04-27||[https://www.parkrun.org.uk/southnorwood/parkrunner/6454631/ South Norwood Parkrun]||19:55||3:59||<br /> |-<br /> |2024-06-29||[https://www.parkrun.org.uk/crystalpalace/parkrunner/6454631/ Crystal Palance Parkrun]||20:43||4:09||<br /> |-<br /> |2024-07-27||[https://www.parkrun.org.uk/bromley/parkrunner/6454631/ Bromley Parkrun]||20:27||4:05||<br /> |-<br /> |2025-03-01||[https://www.parkrun.org.uk/medina/parkrunner/6454631/ Medina IOW Parkrun]||22:04||4:25||<br /> |-<br /> |2025-08-17||[https://results.runthrough.co.uk/myresults.aspx?uid=16487-5495-2-25249 Dulwich Park]||19:58||4:00||13th Overall, 1st in V50 category&lt;br/&gt;Pacer V2<br /> |}<br /> <br /> Target: 20:00 (4:00 min/km)<br /> <br /> === 10 km ===<br /> <br /> {| class=&quot;wikitable&quot;<br /> !Date<br /> !Location<br /> !Time<br /> !Pace (min/km)<br /> !Notes<br /> |-<br /> |2025-01-19||Regent's Park||43:03||4:18||2 weeks off/with injury. Metaspeed, cool.<br /> |-<br /> |2025-06-18||[https://results.netiming.co.uk/results.aspx?CId=20008&amp;RId=465 Norman Park]||44:18||4:26||32nd of 292 overall. Pacer V2, Very hot.<br /> |-<br /> |2025-08-24||[https://results.runthrough.co.uk/myresults.aspx?CId=16487&amp;RId=5504&amp;EId=1&amp;AId=1103850 Regent's Park]||41:57||4:12||18th of 362 overall. Metaspeed, warmish.<br /> |-<br /> |2026-06-14||[https://www.orpingtonroadrunners.org.uk/high-elms-10k High Elms]|| || ||<br /> |-<br /> |}<br /> <br /> Target: 42:00 (4:12 min/km)<br /> <br /> === 10 mile (16 km) ===<br /> <br /> {| class=&quot;wikitable&quot;<br /> !Date<br /> !Location<br /> !Time<br /> !Pace (min/km)<br /> !Notes<br /> |-<br /> |2026-06-07||[https://results.racetimingsolutions.co.uk/myresults.aspx?CId=16269&amp;RId=24211&amp;EId=2&amp;AId=231951 Dorking]||1:08:30||4:15||Metaspped, cool/slight wind, undulating.<br /> |-<br /> |}<br /> <br /> Target: 1:09:00 (4:17 min/km)<br /> <br /> === Half (21.1 km) ===<br /> <br /> {| class=&quot;wikitable&quot;<br /> !Date<br /> !Location<br /> !Time<br /> !Pace (min/km)<br /> !Notes<br /> |-<br /> |2023-09-03||London [https://www.thebighalf.co.uk/ Big Half]||1:36:57||4:36||Hot<br /> |-<br /> |2024-09-01||London Big Half||1:32:20||4:23||Hot<br /> |-<br /> |2025-09-07||London Big Half||1:32:06||4:22||Warm. On 1:30 pace until halfway, legs tiring.&lt;br/&gt;Insufficient training at race pace?<br /> |-<br /> |2026-09-06||London Big Half|| || ||<br /> <br /> |}<br /> <br /> Target: 1:30:00 (4:16 min/km)<br /> <br /> Notes from BH:<br /> * Pre-race warmup walk<br /> * Fueling plan<br /> * Plan point of sprint finish earlier<br /> <br /> === Marathon (42.2 km) ===<br /> <br /> {| class=&quot;wikitable&quot;<br /> !Date<br /> !Location<br /> !Time<br /> !Pace (min/km)<br /> !Notes<br /> <br /> |-<br /> |2022-05-01||[https://mkmarathon.com/ Milton Keynes]||3:53:00||5:31||Cramp near end: no fueling plan.<br /> |-<br /> |2023-05-01||Milton Keynes||3:34:04||5:04||<br /> |-<br /> |2024-05-06||Milton Keynes||3:21:04||4:46||<br /> |-<br /> |2025-05-05||Milton Keynes||3:40:21||5:13||After injury: insufficient long runs.&lt;br/&gt;Cool, 5 Gells/tablets/2 caffine&lt;br/&gt;Severe cramp in last 6 km<br /> |-<br /> |2025-10-18||[https://results.runthrough.co.uk/myresults.aspx?uid=16487-5587-6-56342 Battersea Park]||3:19:58||4:44||Cool, flat. 4 Gells + Sweets.Achillies niggle, New Balance&lt;br/&gt;Bad blisters, cramp after finish<br /> |-<br /> |2026-04-12||Brighton||3:29:04||4:57||Superblast 2 (Sunny but not too hot, light wind). Only 2 weeks intensive (100+k) after Achilles recovery. Needed to walk at water stations with cups. Fueling: good gel use, 2 caffeine tabs, 2 electrolyte tabs. Steady heart rate. Started to get cramp in last 5 km, very bad (needed to run/walk) in last 2 km.<br /> [https://www.londonmarathonevents.co.uk/sites/default/files/2025-03/BRTN_2025_Road_Closure_Map_v4%201.pdf Map]<br /> |-<br /> |2026-05-04||[https://results.resultsbase.net/myresults.aspx?CId=8&amp;RId=21049&amp;EId=1&amp;AId=81587 Milton Keynes]||3:18:04||4:41||Cool, steady pace, Metaspeed Sky +, good gel/electrolytes, no cramp until a little crossing the finish.<br /> [https://www.mapmyrun.com/routes/view/5974644058 Map]<br /> |-<br /> |2026-10-24||Battersea Park|| || ||<br /> |-<br /> |2027-04-18||Newport|| || ||<br /> |-<br /> <br /> |}<br /> <br /> Targets:<br /> * 3:30:00 (4:59 min/km) <br /> * 3:20:00 (4:44 min/km)<br /> * 3:15:00 (4:37 min/km)<br /> <br /> == Training ==<br /> <br /> * Polarised Training:<br /> ** Mostly consistent slow runs, high volume<br /> ** Speed work at Parkrun and track. <br /> * Taper<br /> ** 2 - 3 weeks unnecessary if comfortable with prior volume, so used to recovering.<br /> ** Reduce volume but maintain intensity<br /> * Sprints<br /> ** Hill sprints develop power; high cadence/look up not down<br /> ** Sprint training should be done not to exhaustion: multiple short bursts to engage fast twitch muscles<br /> * Alternate:<br /> ** 2 weeks High Load (100+ km)<br /> ** 1 week De-load<br /> ** Vary according to feel, additional races<br /> ** Do not attempt full send Parkrun every week<br /> * Be more specific closer to the race<br /> * 2 Weeks from Marathon, peak with race-specific effort:<br /> ** 10 k easy / 15-20 km @ race pace (4:37 min/km)<br /> ** 4 x (5 km @ race pace + 1 km easy)<br /> <br /> {| class=&quot;wikitable&quot;<br /> ! !!Mon!!Tue!!Wed!!Thu!!Fri!!Sat!!Sun<br /> <br /> |-<br /> |High Load<br /> |18 km<br /> |AM: 9 - 18 km;&lt;br/&gt;PM: Track, Max effort<br /> |12 km<br /> |18 km<br /> |Rest / S&amp;C<br /> |21 - 37 km<br /> |Rest / 8.5 km depending on previous day<br /> |-<br /> |De-Load<br /> |8 km hill<br /> |AM: 5 km;&lt;br/&gt;PM: Track, Max effort<br /> |9 km<br /> |12 km<br /> |Rest / S&amp;C<br /> |''Parkrun'' 2 - 3 km warmup; 5 km race<br /> |Rest / S&amp;C<br /> <br /> |}<br /> <br /> Distances:<br /> * ~ 6 km : 2 loops around SN Park<br /> * 9 km : Beckenham J - Penge E<br /> * 12 km : to BP Park<br /> * ~ 12.5 km : CPalace - Sydenham - Beckenham J<br /> * ~ 19 km : Elmers - Shirley - WWickham - Beckenham<br /> * ~ 21.6 km : Grenwich observatory and back<br /> * ~ 23 km : Elmers - Shirley - WWickham - Beckenham J with BP Park loop<br /> * ~ 29.3 km : To SB, Grenwich observatory and back<br /> * ~ 31.5 km : Elmers - Shirley - WWickham - Beckenham (and repeat with shortcut)<br /> <br /> S/C Excercises:<br /> * Calf Raise<br /> * Bench Lunge<br /> * Plank<br /> * Side Plank<br /> * Toe Walk<br /> * Heel Walk<br /> <br /> Form:<br /> * Check, especially when tired<br /> * Stop flapping arms about<br /> * Don't slouch forward<br /> <br /> == Shoes ==<br /> <br /> Current:<br /> * ASICS Metaspeed Sky+ (204 g) [2023-12]: Important Races: Half/Marathon. Carbon Plate.<br /> * ASICS Novablast 5 (260 g) [2025-01]: Everyday, Easy, Parkrun.<br /> * ASICS Nimbus 27 (300 g) [2025-04]: Extra cushioned, long runs.<br /> * New Balance FuelCell SuperComp Pacer V2 (209 g) [2025-05]: Important Races: 5k/10k. Carbon Plate.<br /> ** Half size up, but still too tight for long runs.<br /> * ASICS Gel Pulse 15 (260 g) [2025-09]: Walking, light runs.<br /> * ASICS SuperBlast 2 (250 g) [2026-01]: Tempo, Track, more cushioned for Half/Marathon.<br /> * Scott Supertrac RC 2 Trail (270 g) [2026-01]: Cross-Country.<br /> ** 1 size up<br /> <br /> Consider:<br /> * ASICS Metaspeed Sky/Edge Tokyo (188 g, £240): Races/speed<br /> * ASICS MegaBlast (230g, £210): Fast non-plate<br /> * ASICS Metaspeed Ride (282 g, £180)<br /> * ASICS Sonicblast Tokyo (256 g, *£170): Plate version of novablast? Tempo?<br /> * ASICS Magic Speed 4 (242 g, £160 - 15%): Plate, tempo/speed work.<br /> * ASICS Novablast 5 (260 g, *£135)<br /> * ASICS Trabuco 14 (* £140): Trail<br /> * Li-Ning Eedian 6 Elite (~200 g): Races<br /> * Li-Ning Eedian 6 Challenger (~200 g): Propulsion and stability<br /> <br /> Retired:<br /> * ASICS NovaBlast 3 (252 g) [2023-07]: Tempo/Track/Parkrun<br /> * Saucony Mens Ride 17 (282 g) [2024-03]: Easy Run, Daily<br /> * ASICS Cumulus<br /> * ASICS Nimbus 22<br /> * ASICS Nimbus 24 [2023-07]<br /> <br /> == Research ==<br /> <br /> * [https://www.researchgate.net/profile/Malcolm-Collins/publication/49674432_Increased_running_speed_and_previous_cramps_rather_than_dehydration_or_serum_sodium_changes_predict_exercise-associated_muscle_cramping_A_prospective_cohort_study_in_210_Ironman_triathletes/links/0a85e53c93b820db45000000/Increased-running-speed-and-previous-cramps-rather-than-dehydration-or-serum-sodium-changes-predict-exercise-associated-muscle-cramping-A-prospective-cohort-study-in-210-Ironman-triathletes.pdf Increased running speed and previous cramps rather than dehydration or serum sodium]<br /> <br /> == YouTube ==<br /> <br /> Runners:<br /> * [https://www.youtube.com/@BenParkes Ben Parkes]<br /> * [https://www.youtube.com/@thisisjogon Jog On]<br /> * [https://www.youtube.com/@kofuzi Kofuzi]<br /> * [https://www.youtube.com/@justalilbester Nick Bester]<br /> * [https://www.youtube.com/@PhilyBowden Phily Bowden]<br /> * [https://www.youtube.com/@RanToJapan Ran To Japan]<br /> * [https://www.youtube.com/@runningchannel The Running Channel]<br /> <br /> Physio/Coach:<br /> * [https://www.youtube.com/@SpringSnabbare Fredrik Zillén]<br /> * [https://www.youtube.com/@NicklasRossnerPT Nick Rossner]<br /> * [https://www.youtube.com/@runelitecoach Run Elite]<br /> * [https://www.youtube.com/@TheRunExperience The Run Experience]<br /> * [https://www.youtube.com/@SteveMagness Steve Magness]<br /> <br /> == Diet &amp; Supplements ==<br /> <br /> * Eat at least 2 hours before a race<br /> * Marathon/Half:<br /> ** Start taking carbs 20 mins after the start of a race<br /> ** At least 60 g / hour<br /> ** SiS GO Isotonic: 22 g carbs (general training)<br /> ** SiS Beta: 40 g carbs (important long races)<br /> * Reduce oil intake which reduces nitric oxide<br /> * Nitric oxide rich foods: rhubarb, celery, lettuce, beetroot, watermelon<br /> * Sodium<br /> ** Suggested 300 - 600 mg/hr; up to 1 g/hr on very hot days.<br /> ** 2 tablets: 200 mg<br /> * Caffeine<br /> ** 3 - 6 mg/kg -&gt; ~ 400 mg (2 tablets)<br /> ** ~ 30 - 60 mins prior to race<br /> ** ~ 6 hours half life<br /> * Turmeric<br /> ** Taken after exercise, can help with DOMS/recovery/anti-inflammatory<br /> ** Eat with black pepper or fat to aid absorption<br /> * Creatine Monohydrate<br /> ** 5 - 10 g daily<br /> * Magnesium Glycinate<br /> ** 3 g daily<br /> * Collagen<br /> ** 10 - 15 g of hydrolyzed collagen peptides<br /> ** Collagen synthesis is dependent on Vitamin C<br /> ** 30 – 60 mins before strength training<br /> ** Do not take caffeine beforehand</div>

NickPGSmith https://www.smithnet.org.uk/wiki/index.php?title=Running&diff=1762 2026-06-07T11:58:10Z

<p>NickPGSmith: /* 10 mile (16 km) */</p> <hr /> <div>== Distances ==<br /> <br /> See [https://www.calculator.net/pace-calculator.html Pace Calculator].<br /> <br /> === 5 km ===<br /> <br /> * [https://www.parkrun.org.uk/parkrunner/6454631/all/ All Parkruns]<br /> <br /> {| class=&quot;wikitable&quot;<br /> !Date<br /> !Location<br /> !Time<br /> !Pace (min/km)<br /> !Notes<br /> |-<br /> |2023-08-12||[https://www.parkrun.org.uk/swanseabay/parkrunner/6454631/ Swansea Bay Parkrun]||19:27||3:53||<br /> |-<br /> |2024-05-11&lt;/br&gt;2026-04-27||[https://www.parkrun.org.uk/southnorwood/parkrunner/6454631/ South Norwood Parkrun]||19:55||3:59||<br /> |-<br /> |2024-06-29||[https://www.parkrun.org.uk/crystalpalace/parkrunner/6454631/ Crystal Palance Parkrun]||20:43||4:09||<br /> |-<br /> |2024-07-27||[https://www.parkrun.org.uk/bromley/parkrunner/6454631/ Bromley Parkrun]||20:27||4:05||<br /> |-<br /> |2025-03-01||[https://www.parkrun.org.uk/medina/parkrunner/6454631/ Medina IOW Parkrun]||22:04||4:25||<br /> |-<br /> |2025-08-17||[https://results.runthrough.co.uk/myresults.aspx?uid=16487-5495-2-25249 Dulwich Park]||19:58||4:00||13th Overall, 1st in V50 category&lt;br/&gt;Pacer V2<br /> |}<br /> <br /> Target: 20:00 (4:00 min/km)<br /> <br /> === 10 km ===<br /> <br /> {| class=&quot;wikitable&quot;<br /> !Date<br /> !Location<br /> !Time<br /> !Pace (min/km)<br /> !Notes<br /> |-<br /> |2025-01-19||Regent's Park||43:03||4:18||2 weeks off/with injury. Metaspeed, cool.<br /> |-<br /> |2025-06-18||[https://results.netiming.co.uk/results.aspx?CId=20008&amp;RId=465 Norman Park]||44:18||4:26||32nd of 292 overall. Pacer V2, Very hot.<br /> |-<br /> |2025-08-24||[https://results.runthrough.co.uk/myresults.aspx?CId=16487&amp;RId=5504&amp;EId=1&amp;AId=1103850 Regent's Park]||41:57||4:12||18th of 362 overall. Metaspeed, warmish.<br /> |-<br /> |2026-06-14||[https://www.orpingtonroadrunners.org.uk/high-elms-10k High Elms]|| || ||<br /> |-<br /> |}<br /> <br /> Target: 42:00 (4:12 min/km)<br /> <br /> === 10 mile (16 km) ===<br /> <br /> {| class=&quot;wikitable&quot;<br /> !Date<br /> !Location<br /> !Time<br /> !Pace (min/km)<br /> !Notes<br /> |-<br /> |2026-06-07||Dorking||1:08:30||4:15||Metaspped, cool/slight wind, undulating.<br /> |-<br /> |}<br /> <br /> Target: 1:09:00 (4:17 min/km)<br /> <br /> === Half (21.1 km) ===<br /> <br /> {| class=&quot;wikitable&quot;<br /> !Date<br /> !Location<br /> !Time<br /> !Pace (min/km)<br /> !Notes<br /> |-<br /> |2023-09-03||London [https://www.thebighalf.co.uk/ Big Half]||1:36:57||4:36||Hot<br /> |-<br /> |2024-09-01||London Big Half||1:32:20||4:23||Hot<br /> |-<br /> |2025-09-07||London Big Half||1:32:06||4:22||Warm. On 1:30 pace until halfway, legs tiring.&lt;br/&gt;Insufficient training at race pace?<br /> |-<br /> |2026-09-06||London Big Half|| || ||<br /> <br /> |}<br /> <br /> Target: 1:30:00 (4:16 min/km)<br /> <br /> Notes from BH:<br /> * Pre-race warmup walk<br /> * Fueling plan<br /> * Plan point of sprint finish earlier<br /> <br /> === Marathon (42.2 km) ===<br /> <br /> {| class=&quot;wikitable&quot;<br /> !Date<br /> !Location<br /> !Time<br /> !Pace (min/km)<br /> !Notes<br /> <br /> |-<br /> |2022-05-01||[https://mkmarathon.com/ Milton Keynes]||3:53:00||5:31||Cramp near end: no fueling plan.<br /> |-<br /> |2023-05-01||Milton Keynes||3:34:04||5:04||<br /> |-<br /> |2024-05-06||Milton Keynes||3:21:04||4:46||<br /> |-<br /> |2025-05-05||Milton Keynes||3:40:21||5:13||After injury: insufficient long runs.&lt;br/&gt;Cool, 5 Gells/tablets/2 caffine&lt;br/&gt;Severe cramp in last 6 km<br /> |-<br /> |2025-10-18||[https://results.runthrough.co.uk/myresults.aspx?uid=16487-5587-6-56342 Battersea Park]||3:19:58||4:44||Cool, flat. 4 Gells + Sweets.Achillies niggle, New Balance&lt;br/&gt;Bad blisters, cramp after finish<br /> |-<br /> |2026-04-12||Brighton||3:29:04||4:57||Superblast 2 (Sunny but not too hot, light wind). Only 2 weeks intensive (100+k) after Achilles recovery. Needed to walk at water stations with cups. Fueling: good gel use, 2 caffeine tabs, 2 electrolyte tabs. Steady heart rate. Started to get cramp in last 5 km, very bad (needed to run/walk) in last 2 km.<br /> [https://www.londonmarathonevents.co.uk/sites/default/files/2025-03/BRTN_2025_Road_Closure_Map_v4%201.pdf Map]<br /> |-<br /> |2026-05-04||[https://results.resultsbase.net/myresults.aspx?CId=8&amp;RId=21049&amp;EId=1&amp;AId=81587 Milton Keynes]||3:18:04||4:41||Cool, steady pace, Metaspeed Sky +, good gel/electrolytes, no cramp until a little crossing the finish.<br /> [https://www.mapmyrun.com/routes/view/5974644058 Map]<br /> |-<br /> |2026-10-24||Battersea Park|| || ||<br /> |-<br /> |2027-04-18||Newport|| || ||<br /> |-<br /> <br /> |}<br /> <br /> Targets:<br /> * 3:30:00 (4:59 min/km) <br /> * 3:20:00 (4:44 min/km)<br /> * 3:15:00 (4:37 min/km)<br /> <br /> == Training ==<br /> <br /> * Polarised Training:<br /> ** Mostly consistent slow runs, high volume<br /> ** Speed work at Parkrun and track. <br /> * Taper<br /> ** 2 - 3 weeks unnecessary if comfortable with prior volume, so used to recovering.<br /> ** Reduce volume but maintain intensity<br /> * Sprints<br /> ** Hill sprints develop power; high cadence/look up not down<br /> ** Sprint training should be done not to exhaustion: multiple short bursts to engage fast twitch muscles<br /> * Alternate:<br /> ** 2 weeks High Load (100+ km)<br /> ** 1 week De-load<br /> ** Vary according to feel, additional races<br /> ** Do not attempt full send Parkrun every week<br /> * Be more specific closer to the race<br /> * 2 Weeks from Marathon, peak with race-specific effort:<br /> ** 10 k easy / 15-20 km @ race pace (4:37 min/km)<br /> ** 4 x (5 km @ race pace + 1 km easy)<br /> <br /> {| class=&quot;wikitable&quot;<br /> ! !!Mon!!Tue!!Wed!!Thu!!Fri!!Sat!!Sun<br /> <br /> |-<br /> |High Load<br /> |18 km<br /> |AM: 9 - 18 km;&lt;br/&gt;PM: Track, Max effort<br /> |12 km<br /> |18 km<br /> |Rest / S&amp;C<br /> |21 - 37 km<br /> |Rest / 8.5 km depending on previous day<br /> |-<br /> |De-Load<br /> |8 km hill<br /> |AM: 5 km;&lt;br/&gt;PM: Track, Max effort<br /> |9 km<br /> |12 km<br /> |Rest / S&amp;C<br /> |''Parkrun'' 2 - 3 km warmup; 5 km race<br /> |Rest / S&amp;C<br /> <br /> |}<br /> <br /> Distances:<br /> * ~ 6 km : 2 loops around SN Park<br /> * 9 km : Beckenham J - Penge E<br /> * 12 km : to BP Park<br /> * ~ 12.5 km : CPalace - Sydenham - Beckenham J<br /> * ~ 19 km : Elmers - Shirley - WWickham - Beckenham<br /> * ~ 21.6 km : Grenwich observatory and back<br /> * ~ 23 km : Elmers - Shirley - WWickham - Beckenham J with BP Park loop<br /> * ~ 29.3 km : To SB, Grenwich observatory and back<br /> * ~ 31.5 km : Elmers - Shirley - WWickham - Beckenham (and repeat with shortcut)<br /> <br /> S/C Excercises:<br /> * Calf Raise<br /> * Bench Lunge<br /> * Plank<br /> * Side Plank<br /> * Toe Walk<br /> * Heel Walk<br /> <br /> Form:<br /> * Check, especially when tired<br /> * Stop flapping arms about<br /> * Don't slouch forward<br /> <br /> == Shoes ==<br /> <br /> Current:<br /> * ASICS Metaspeed Sky+ (204 g) [2023-12]: Important Races: Half/Marathon. Carbon Plate.<br /> * ASICS Novablast 5 (260 g) [2025-01]: Everyday, Easy, Parkrun.<br /> * ASICS Nimbus 27 (300 g) [2025-04]: Extra cushioned, long runs.<br /> * New Balance FuelCell SuperComp Pacer V2 (209 g) [2025-05]: Important Races: 5k/10k. Carbon Plate.<br /> ** Half size up, but still too tight for long runs.<br /> * ASICS Gel Pulse 15 (260 g) [2025-09]: Walking, light runs.<br /> * ASICS SuperBlast 2 (250 g) [2026-01]: Tempo, Track, more cushioned for Half/Marathon.<br /> * Scott Supertrac RC 2 Trail (270 g) [2026-01]: Cross-Country.<br /> ** 1 size up<br /> <br /> Consider:<br /> * ASICS Metaspeed Sky/Edge Tokyo (188 g, £240): Races/speed<br /> * ASICS MegaBlast (230g, £210): Fast non-plate<br /> * ASICS Metaspeed Ride (282 g, £180)<br /> * ASICS Sonicblast Tokyo (256 g, *£170): Plate version of novablast? Tempo?<br /> * ASICS Magic Speed 4 (242 g, £160 - 15%): Plate, tempo/speed work.<br /> * ASICS Novablast 5 (260 g, *£135)<br /> * ASICS Trabuco 14 (* £140): Trail<br /> * Li-Ning Eedian 6 Elite (~200 g): Races<br /> * Li-Ning Eedian 6 Challenger (~200 g): Propulsion and stability<br /> <br /> Retired:<br /> * ASICS NovaBlast 3 (252 g) [2023-07]: Tempo/Track/Parkrun<br /> * Saucony Mens Ride 17 (282 g) [2024-03]: Easy Run, Daily<br /> * ASICS Cumulus<br /> * ASICS Nimbus 22<br /> * ASICS Nimbus 24 [2023-07]<br /> <br /> == Research ==<br /> <br /> * [https://www.researchgate.net/profile/Malcolm-Collins/publication/49674432_Increased_running_speed_and_previous_cramps_rather_than_dehydration_or_serum_sodium_changes_predict_exercise-associated_muscle_cramping_A_prospective_cohort_study_in_210_Ironman_triathletes/links/0a85e53c93b820db45000000/Increased-running-speed-and-previous-cramps-rather-than-dehydration-or-serum-sodium-changes-predict-exercise-associated-muscle-cramping-A-prospective-cohort-study-in-210-Ironman-triathletes.pdf Increased running speed and previous cramps rather than dehydration or serum sodium]<br /> <br /> == YouTube ==<br /> <br /> Runners:<br /> * [https://www.youtube.com/@BenParkes Ben Parkes]<br /> * [https://www.youtube.com/@thisisjogon Jog On]<br /> * [https://www.youtube.com/@kofuzi Kofuzi]<br /> * [https://www.youtube.com/@justalilbester Nick Bester]<br /> * [https://www.youtube.com/@PhilyBowden Phily Bowden]<br /> * [https://www.youtube.com/@RanToJapan Ran To Japan]<br /> * [https://www.youtube.com/@runningchannel The Running Channel]<br /> <br /> Physio/Coach:<br /> * [https://www.youtube.com/@SpringSnabbare Fredrik Zillén]<br /> * [https://www.youtube.com/@NicklasRossnerPT Nick Rossner]<br /> * [https://www.youtube.com/@runelitecoach Run Elite]<br /> * [https://www.youtube.com/@TheRunExperience The Run Experience]<br /> * [https://www.youtube.com/@SteveMagness Steve Magness]<br /> <br /> == Diet &amp; Supplements ==<br /> <br /> * Eat at least 2 hours before a race<br /> * Marathon/Half:<br /> ** Start taking carbs 20 mins after the start of a race<br /> ** At least 60 g / hour<br /> ** SiS GO Isotonic: 22 g carbs (general training)<br /> ** SiS Beta: 40 g carbs (important long races)<br /> * Reduce oil intake which reduces nitric oxide<br /> * Nitric oxide rich foods: rhubarb, celery, lettuce, beetroot, watermelon<br /> * Sodium<br /> ** Suggested 300 - 600 mg/hr; up to 1 g/hr on very hot days.<br /> ** 2 tablets: 200 mg<br /> * Caffeine<br /> ** 3 - 6 mg/kg -&gt; ~ 400 mg (2 tablets)<br /> ** ~ 30 - 60 mins prior to race<br /> ** ~ 6 hours half life<br /> * Turmeric<br /> ** Taken after exercise, can help with DOMS/recovery/anti-inflammatory<br /> ** Eat with black pepper or fat to aid absorption<br /> * Creatine Monohydrate<br /> ** 5 - 10 g daily<br /> * Magnesium Glycinate<br /> ** 3 g daily<br /> * Collagen<br /> ** 10 - 15 g of hydrolyzed collagen peptides<br /> ** Collagen synthesis is dependent on Vitamin C<br /> ** 30 – 60 mins before strength training<br /> ** Do not take caffeine beforehand</div>

NickPGSmith https://www.smithnet.org.uk/wiki/index.php?title=Running&diff=1761 2026-06-07T11:56:54Z

<p>NickPGSmith: /* 10 mile (16 km) */</p> <hr /> <div>== Distances ==<br /> <br /> See [https://www.calculator.net/pace-calculator.html Pace Calculator].<br /> <br /> === 5 km ===<br /> <br /> * [https://www.parkrun.org.uk/parkrunner/6454631/all/ All Parkruns]<br /> <br /> {| class=&quot;wikitable&quot;<br /> !Date<br /> !Location<br /> !Time<br /> !Pace (min/km)<br /> !Notes<br /> |-<br /> |2023-08-12||[https://www.parkrun.org.uk/swanseabay/parkrunner/6454631/ Swansea Bay Parkrun]||19:27||3:53||<br /> |-<br /> |2024-05-11&lt;/br&gt;2026-04-27||[https://www.parkrun.org.uk/southnorwood/parkrunner/6454631/ South Norwood Parkrun]||19:55||3:59||<br /> |-<br /> |2024-06-29||[https://www.parkrun.org.uk/crystalpalace/parkrunner/6454631/ Crystal Palance Parkrun]||20:43||4:09||<br /> |-<br /> |2024-07-27||[https://www.parkrun.org.uk/bromley/parkrunner/6454631/ Bromley Parkrun]||20:27||4:05||<br /> |-<br /> |2025-03-01||[https://www.parkrun.org.uk/medina/parkrunner/6454631/ Medina IOW Parkrun]||22:04||4:25||<br /> |-<br /> |2025-08-17||[https://results.runthrough.co.uk/myresults.aspx?uid=16487-5495-2-25249 Dulwich Park]||19:58||4:00||13th Overall, 1st in V50 category&lt;br/&gt;Pacer V2<br /> |}<br /> <br /> Target: 20:00 (4:00 min/km)<br /> <br /> === 10 km ===<br /> <br /> {| class=&quot;wikitable&quot;<br /> !Date<br /> !Location<br /> !Time<br /> !Pace (min/km)<br /> !Notes<br /> |-<br /> |2025-01-19||Regent's Park||43:03||4:18||2 weeks off/with injury. Metaspeed, cool.<br /> |-<br /> |2025-06-18||[https://results.netiming.co.uk/results.aspx?CId=20008&amp;RId=465 Norman Park]||44:18||4:26||32nd of 292 overall. Pacer V2, Very hot.<br /> |-<br /> |2025-08-24||[https://results.runthrough.co.uk/myresults.aspx?CId=16487&amp;RId=5504&amp;EId=1&amp;AId=1103850 Regent's Park]||41:57||4:12||18th of 362 overall. Metaspeed, warmish.<br /> |-<br /> |2026-06-14||[https://www.orpingtonroadrunners.org.uk/high-elms-10k High Elms]|| || ||<br /> |-<br /> |}<br /> <br /> Target: 42:00 (4:12 min/km)<br /> <br /> === 10 mile (16 km) ===<br /> <br /> {| class=&quot;wikitable&quot;<br /> !Date<br /> !Location<br /> !Time<br /> !Pace (min/km)<br /> !Notes<br /> |-<br /> |2026-06-07||Dorking||1:08:30||4:15||<br /> |-<br /> |}<br /> <br /> Target: 1:09:00 (4:17 min/km)<br /> <br /> === Half (21.1 km) ===<br /> <br /> {| class=&quot;wikitable&quot;<br /> !Date<br /> !Location<br /> !Time<br /> !Pace (min/km)<br /> !Notes<br /> |-<br /> |2023-09-03||London [https://www.thebighalf.co.uk/ Big Half]||1:36:57||4:36||Hot<br /> |-<br /> |2024-09-01||London Big Half||1:32:20||4:23||Hot<br /> |-<br /> |2025-09-07||London Big Half||1:32:06||4:22||Warm. On 1:30 pace until halfway, legs tiring.&lt;br/&gt;Insufficient training at race pace?<br /> |-<br /> |2026-09-06||London Big Half|| || ||<br /> <br /> |}<br /> <br /> Target: 1:30:00 (4:16 min/km)<br /> <br /> Notes from BH:<br /> * Pre-race warmup walk<br /> * Fueling plan<br /> * Plan point of sprint finish earlier<br /> <br /> === Marathon (42.2 km) ===<br /> <br /> {| class=&quot;wikitable&quot;<br /> !Date<br /> !Location<br /> !Time<br /> !Pace (min/km)<br /> !Notes<br /> <br /> |-<br /> |2022-05-01||[https://mkmarathon.com/ Milton Keynes]||3:53:00||5:31||Cramp near end: no fueling plan.<br /> |-<br /> |2023-05-01||Milton Keynes||3:34:04||5:04||<br /> |-<br /> |2024-05-06||Milton Keynes||3:21:04||4:46||<br /> |-<br /> |2025-05-05||Milton Keynes||3:40:21||5:13||After injury: insufficient long runs.&lt;br/&gt;Cool, 5 Gells/tablets/2 caffine&lt;br/&gt;Severe cramp in last 6 km<br /> |-<br /> |2025-10-18||[https://results.runthrough.co.uk/myresults.aspx?uid=16487-5587-6-56342 Battersea Park]||3:19:58||4:44||Cool, flat. 4 Gells + Sweets.Achillies niggle, New Balance&lt;br/&gt;Bad blisters, cramp after finish<br /> |-<br /> |2026-04-12||Brighton||3:29:04||4:57||Superblast 2 (Sunny but not too hot, light wind). Only 2 weeks intensive (100+k) after Achilles recovery. Needed to walk at water stations with cups. Fueling: good gel use, 2 caffeine tabs, 2 electrolyte tabs. Steady heart rate. Started to get cramp in last 5 km, very bad (needed to run/walk) in last 2 km.<br /> [https://www.londonmarathonevents.co.uk/sites/default/files/2025-03/BRTN_2025_Road_Closure_Map_v4%201.pdf Map]<br /> |-<br /> |2026-05-04||[https://results.resultsbase.net/myresults.aspx?CId=8&amp;RId=21049&amp;EId=1&amp;AId=81587 Milton Keynes]||3:18:04||4:41||Cool, steady pace, Metaspeed Sky +, good gel/electrolytes, no cramp until a little crossing the finish.<br /> [https://www.mapmyrun.com/routes/view/5974644058 Map]<br /> |-<br /> |2026-10-24||Battersea Park|| || ||<br /> |-<br /> |2027-04-18||Newport|| || ||<br /> |-<br /> <br /> |}<br /> <br /> Targets:<br /> * 3:30:00 (4:59 min/km) <br /> * 3:20:00 (4:44 min/km)<br /> * 3:15:00 (4:37 min/km)<br /> <br /> == Training ==<br /> <br /> * Polarised Training:<br /> ** Mostly consistent slow runs, high volume<br /> ** Speed work at Parkrun and track. <br /> * Taper<br /> ** 2 - 3 weeks unnecessary if comfortable with prior volume, so used to recovering.<br /> ** Reduce volume but maintain intensity<br /> * Sprints<br /> ** Hill sprints develop power; high cadence/look up not down<br /> ** Sprint training should be done not to exhaustion: multiple short bursts to engage fast twitch muscles<br /> * Alternate:<br /> ** 2 weeks High Load (100+ km)<br /> ** 1 week De-load<br /> ** Vary according to feel, additional races<br /> ** Do not attempt full send Parkrun every week<br /> * Be more specific closer to the race<br /> * 2 Weeks from Marathon, peak with race-specific effort:<br /> ** 10 k easy / 15-20 km @ race pace (4:37 min/km)<br /> ** 4 x (5 km @ race pace + 1 km easy)<br /> <br /> {| class=&quot;wikitable&quot;<br /> ! !!Mon!!Tue!!Wed!!Thu!!Fri!!Sat!!Sun<br /> <br /> |-<br /> |High Load<br /> |18 km<br /> |AM: 9 - 18 km;&lt;br/&gt;PM: Track, Max effort<br /> |12 km<br /> |18 km<br /> |Rest / S&amp;C<br /> |21 - 37 km<br /> |Rest / 8.5 km depending on previous day<br /> |-<br /> |De-Load<br /> |8 km hill<br /> |AM: 5 km;&lt;br/&gt;PM: Track, Max effort<br /> |9 km<br /> |12 km<br /> |Rest / S&amp;C<br /> |''Parkrun'' 2 - 3 km warmup; 5 km race<br /> |Rest / S&amp;C<br /> <br /> |}<br /> <br /> Distances:<br /> * ~ 6 km : 2 loops around SN Park<br /> * 9 km : Beckenham J - Penge E<br /> * 12 km : to BP Park<br /> * ~ 12.5 km : CPalace - Sydenham - Beckenham J<br /> * ~ 19 km : Elmers - Shirley - WWickham - Beckenham<br /> * ~ 21.6 km : Grenwich observatory and back<br /> * ~ 23 km : Elmers - Shirley - WWickham - Beckenham J with BP Park loop<br /> * ~ 29.3 km : To SB, Grenwich observatory and back<br /> * ~ 31.5 km : Elmers - Shirley - WWickham - Beckenham (and repeat with shortcut)<br /> <br /> S/C Excercises:<br /> * Calf Raise<br /> * Bench Lunge<br /> * Plank<br /> * Side Plank<br /> * Toe Walk<br /> * Heel Walk<br /> <br /> Form:<br /> * Check, especially when tired<br /> * Stop flapping arms about<br /> * Don't slouch forward<br /> <br /> == Shoes ==<br /> <br /> Current:<br /> * ASICS Metaspeed Sky+ (204 g) [2023-12]: Important Races: Half/Marathon. Carbon Plate.<br /> * ASICS Novablast 5 (260 g) [2025-01]: Everyday, Easy, Parkrun.<br /> * ASICS Nimbus 27 (300 g) [2025-04]: Extra cushioned, long runs.<br /> * New Balance FuelCell SuperComp Pacer V2 (209 g) [2025-05]: Important Races: 5k/10k. Carbon Plate.<br /> ** Half size up, but still too tight for long runs.<br /> * ASICS Gel Pulse 15 (260 g) [2025-09]: Walking, light runs.<br /> * ASICS SuperBlast 2 (250 g) [2026-01]: Tempo, Track, more cushioned for Half/Marathon.<br /> * Scott Supertrac RC 2 Trail (270 g) [2026-01]: Cross-Country.<br /> ** 1 size up<br /> <br /> Consider:<br /> * ASICS Metaspeed Sky/Edge Tokyo (188 g, £240): Races/speed<br /> * ASICS MegaBlast (230g, £210): Fast non-plate<br /> * ASICS Metaspeed Ride (282 g, £180)<br /> * ASICS Sonicblast Tokyo (256 g, *£170): Plate version of novablast? Tempo?<br /> * ASICS Magic Speed 4 (242 g, £160 - 15%): Plate, tempo/speed work.<br /> * ASICS Novablast 5 (260 g, *£135)<br /> * ASICS Trabuco 14 (* £140): Trail<br /> * Li-Ning Eedian 6 Elite (~200 g): Races<br /> * Li-Ning Eedian 6 Challenger (~200 g): Propulsion and stability<br /> <br /> Retired:<br /> * ASICS NovaBlast 3 (252 g) [2023-07]: Tempo/Track/Parkrun<br /> * Saucony Mens Ride 17 (282 g) [2024-03]: Easy Run, Daily<br /> * ASICS Cumulus<br /> * ASICS Nimbus 22<br /> * ASICS Nimbus 24 [2023-07]<br /> <br /> == Research ==<br /> <br /> * [https://www.researchgate.net/profile/Malcolm-Collins/publication/49674432_Increased_running_speed_and_previous_cramps_rather_than_dehydration_or_serum_sodium_changes_predict_exercise-associated_muscle_cramping_A_prospective_cohort_study_in_210_Ironman_triathletes/links/0a85e53c93b820db45000000/Increased-running-speed-and-previous-cramps-rather-than-dehydration-or-serum-sodium-changes-predict-exercise-associated-muscle-cramping-A-prospective-cohort-study-in-210-Ironman-triathletes.pdf Increased running speed and previous cramps rather than dehydration or serum sodium]<br /> <br /> == YouTube ==<br /> <br /> Runners:<br /> * [https://www.youtube.com/@BenParkes Ben Parkes]<br /> * [https://www.youtube.com/@thisisjogon Jog On]<br /> * [https://www.youtube.com/@kofuzi Kofuzi]<br /> * [https://www.youtube.com/@justalilbester Nick Bester]<br /> * [https://www.youtube.com/@PhilyBowden Phily Bowden]<br /> * [https://www.youtube.com/@RanToJapan Ran To Japan]<br /> * [https://www.youtube.com/@runningchannel The Running Channel]<br /> <br /> Physio/Coach:<br /> * [https://www.youtube.com/@SpringSnabbare Fredrik Zillén]<br /> * [https://www.youtube.com/@NicklasRossnerPT Nick Rossner]<br /> * [https://www.youtube.com/@runelitecoach Run Elite]<br /> * [https://www.youtube.com/@TheRunExperience The Run Experience]<br /> * [https://www.youtube.com/@SteveMagness Steve Magness]<br /> <br /> == Diet &amp; Supplements ==<br /> <br /> * Eat at least 2 hours before a race<br /> * Marathon/Half:<br /> ** Start taking carbs 20 mins after the start of a race<br /> ** At least 60 g / hour<br /> ** SiS GO Isotonic: 22 g carbs (general training)<br /> ** SiS Beta: 40 g carbs (important long races)<br /> * Reduce oil intake which reduces nitric oxide<br /> * Nitric oxide rich foods: rhubarb, celery, lettuce, beetroot, watermelon<br /> * Sodium<br /> ** Suggested 300 - 600 mg/hr; up to 1 g/hr on very hot days.<br /> ** 2 tablets: 200 mg<br /> * Caffeine<br /> ** 3 - 6 mg/kg -&gt; ~ 400 mg (2 tablets)<br /> ** ~ 30 - 60 mins prior to race<br /> ** ~ 6 hours half life<br /> * Turmeric<br /> ** Taken after exercise, can help with DOMS/recovery/anti-inflammatory<br /> ** Eat with black pepper or fat to aid absorption<br /> * Creatine Monohydrate<br /> ** 5 - 10 g daily<br /> * Magnesium Glycinate<br /> ** 3 g daily<br /> * Collagen<br /> ** 10 - 15 g of hydrolyzed collagen peptides<br /> ** Collagen synthesis is dependent on Vitamin C<br /> ** 30 – 60 mins before strength training<br /> ** Do not take caffeine beforehand</div>

NickPGSmith https://www.smithnet.org.uk/wiki/index.php?title=Running&diff=1760 2026-06-07T11:54:27Z

<p>NickPGSmith: /* 10 mile (16 km) */</p> <hr /> <div>== Distances ==<br /> <br /> See [https://www.calculator.net/pace-calculator.html Pace Calculator].<br /> <br /> === 5 km ===<br /> <br /> * [https://www.parkrun.org.uk/parkrunner/6454631/all/ All Parkruns]<br /> <br /> {| class=&quot;wikitable&quot;<br /> !Date<br /> !Location<br /> !Time<br /> !Pace (min/km)<br /> !Notes<br /> |-<br /> |2023-08-12||[https://www.parkrun.org.uk/swanseabay/parkrunner/6454631/ Swansea Bay Parkrun]||19:27||3:53||<br /> |-<br /> |2024-05-11&lt;/br&gt;2026-04-27||[https://www.parkrun.org.uk/southnorwood/parkrunner/6454631/ South Norwood Parkrun]||19:55||3:59||<br /> |-<br /> |2024-06-29||[https://www.parkrun.org.uk/crystalpalace/parkrunner/6454631/ Crystal Palance Parkrun]||20:43||4:09||<br /> |-<br /> |2024-07-27||[https://www.parkrun.org.uk/bromley/parkrunner/6454631/ Bromley Parkrun]||20:27||4:05||<br /> |-<br /> |2025-03-01||[https://www.parkrun.org.uk/medina/parkrunner/6454631/ Medina IOW Parkrun]||22:04||4:25||<br /> |-<br /> |2025-08-17||[https://results.runthrough.co.uk/myresults.aspx?uid=16487-5495-2-25249 Dulwich Park]||19:58||4:00||13th Overall, 1st in V50 category&lt;br/&gt;Pacer V2<br /> |}<br /> <br /> Target: 20:00 (4:00 min/km)<br /> <br /> === 10 km ===<br /> <br /> {| class=&quot;wikitable&quot;<br /> !Date<br /> !Location<br /> !Time<br /> !Pace (min/km)<br /> !Notes<br /> |-<br /> |2025-01-19||Regent's Park||43:03||4:18||2 weeks off/with injury. Metaspeed, cool.<br /> |-<br /> |2025-06-18||[https://results.netiming.co.uk/results.aspx?CId=20008&amp;RId=465 Norman Park]||44:18||4:26||32nd of 292 overall. Pacer V2, Very hot.<br /> |-<br /> |2025-08-24||[https://results.runthrough.co.uk/myresults.aspx?CId=16487&amp;RId=5504&amp;EId=1&amp;AId=1103850 Regent's Park]||41:57||4:12||18th of 362 overall. Metaspeed, warmish.<br /> |-<br /> |2026-06-14||[https://www.orpingtonroadrunners.org.uk/high-elms-10k High Elms]|| || ||<br /> |-<br /> |}<br /> <br /> Target: 42:00 (4:12 min/km)<br /> <br /> === 10 mile (16 km) ===<br /> <br /> {| class=&quot;wikitable&quot;<br /> !Date<br /> !Location<br /> !Time<br /> !Pace (min/km)<br /> !Notes<br /> |-<br /> |2026-06-07||Dorking|| || ||<br /> |-<br /> |}<br /> <br /> Target: 1:09:00 (4:17 min/km)<br /> <br /> === Half (21.1 km) ===<br /> <br /> {| class=&quot;wikitable&quot;<br /> !Date<br /> !Location<br /> !Time<br /> !Pace (min/km)<br /> !Notes<br /> |-<br /> |2023-09-03||London [https://www.thebighalf.co.uk/ Big Half]||1:36:57||4:36||Hot<br /> |-<br /> |2024-09-01||London Big Half||1:32:20||4:23||Hot<br /> |-<br /> |2025-09-07||London Big Half||1:32:06||4:22||Warm. On 1:30 pace until halfway, legs tiring.&lt;br/&gt;Insufficient training at race pace?<br /> |-<br /> |2026-09-06||London Big Half|| || ||<br /> <br /> |}<br /> <br /> Target: 1:30:00 (4:16 min/km)<br /> <br /> Notes from BH:<br /> * Pre-race warmup walk<br /> * Fueling plan<br /> * Plan point of sprint finish earlier<br /> <br /> === Marathon (42.2 km) ===<br /> <br /> {| class=&quot;wikitable&quot;<br /> !Date<br /> !Location<br /> !Time<br /> !Pace (min/km)<br /> !Notes<br /> <br /> |-<br /> |2022-05-01||[https://mkmarathon.com/ Milton Keynes]||3:53:00||5:31||Cramp near end: no fueling plan.<br /> |-<br /> |2023-05-01||Milton Keynes||3:34:04||5:04||<br /> |-<br /> |2024-05-06||Milton Keynes||3:21:04||4:46||<br /> |-<br /> |2025-05-05||Milton Keynes||3:40:21||5:13||After injury: insufficient long runs.&lt;br/&gt;Cool, 5 Gells/tablets/2 caffine&lt;br/&gt;Severe cramp in last 6 km<br /> |-<br /> |2025-10-18||[https://results.runthrough.co.uk/myresults.aspx?uid=16487-5587-6-56342 Battersea Park]||3:19:58||4:44||Cool, flat. 4 Gells + Sweets.Achillies niggle, New Balance&lt;br/&gt;Bad blisters, cramp after finish<br /> |-<br /> |2026-04-12||Brighton||3:29:04||4:57||Superblast 2 (Sunny but not too hot, light wind). Only 2 weeks intensive (100+k) after Achilles recovery. Needed to walk at water stations with cups. Fueling: good gel use, 2 caffeine tabs, 2 electrolyte tabs. Steady heart rate. Started to get cramp in last 5 km, very bad (needed to run/walk) in last 2 km.<br /> [https://www.londonmarathonevents.co.uk/sites/default/files/2025-03/BRTN_2025_Road_Closure_Map_v4%201.pdf Map]<br /> |-<br /> |2026-05-04||[https://results.resultsbase.net/myresults.aspx?CId=8&amp;RId=21049&amp;EId=1&amp;AId=81587 Milton Keynes]||3:18:04||4:41||Cool, steady pace, Metaspeed Sky +, good gel/electrolytes, no cramp until a little crossing the finish.<br /> [https://www.mapmyrun.com/routes/view/5974644058 Map]<br /> |-<br /> |2026-10-24||Battersea Park|| || ||<br /> |-<br /> |2027-04-18||Newport|| || ||<br /> |-<br /> <br /> |}<br /> <br /> Targets:<br /> * 3:30:00 (4:59 min/km) <br /> * 3:20:00 (4:44 min/km)<br /> * 3:15:00 (4:37 min/km)<br /> <br /> == Training ==<br /> <br /> * Polarised Training:<br /> ** Mostly consistent slow runs, high volume<br /> ** Speed work at Parkrun and track. <br /> * Taper<br /> ** 2 - 3 weeks unnecessary if comfortable with prior volume, so used to recovering.<br /> ** Reduce volume but maintain intensity<br /> * Sprints<br /> ** Hill sprints develop power; high cadence/look up not down<br /> ** Sprint training should be done not to exhaustion: multiple short bursts to engage fast twitch muscles<br /> * Alternate:<br /> ** 2 weeks High Load (100+ km)<br /> ** 1 week De-load<br /> ** Vary according to feel, additional races<br /> ** Do not attempt full send Parkrun every week<br /> * Be more specific closer to the race<br /> * 2 Weeks from Marathon, peak with race-specific effort:<br /> ** 10 k easy / 15-20 km @ race pace (4:37 min/km)<br /> ** 4 x (5 km @ race pace + 1 km easy)<br /> <br /> {| class=&quot;wikitable&quot;<br /> ! !!Mon!!Tue!!Wed!!Thu!!Fri!!Sat!!Sun<br /> <br /> |-<br /> |High Load<br /> |18 km<br /> |AM: 9 - 18 km;&lt;br/&gt;PM: Track, Max effort<br /> |12 km<br /> |18 km<br /> |Rest / S&amp;C<br /> |21 - 37 km<br /> |Rest / 8.5 km depending on previous day<br /> |-<br /> |De-Load<br /> |8 km hill<br /> |AM: 5 km;&lt;br/&gt;PM: Track, Max effort<br /> |9 km<br /> |12 km<br /> |Rest / S&amp;C<br /> |''Parkrun'' 2 - 3 km warmup; 5 km race<br /> |Rest / S&amp;C<br /> <br /> |}<br /> <br /> Distances:<br /> * ~ 6 km : 2 loops around SN Park<br /> * 9 km : Beckenham J - Penge E<br /> * 12 km : to BP Park<br /> * ~ 12.5 km : CPalace - Sydenham - Beckenham J<br /> * ~ 19 km : Elmers - Shirley - WWickham - Beckenham<br /> * ~ 21.6 km : Grenwich observatory and back<br /> * ~ 23 km : Elmers - Shirley - WWickham - Beckenham J with BP Park loop<br /> * ~ 29.3 km : To SB, Grenwich observatory and back<br /> * ~ 31.5 km : Elmers - Shirley - WWickham - Beckenham (and repeat with shortcut)<br /> <br /> S/C Excercises:<br /> * Calf Raise<br /> * Bench Lunge<br /> * Plank<br /> * Side Plank<br /> * Toe Walk<br /> * Heel Walk<br /> <br /> Form:<br /> * Check, especially when tired<br /> * Stop flapping arms about<br /> * Don't slouch forward<br /> <br /> == Shoes ==<br /> <br /> Current:<br /> * ASICS Metaspeed Sky+ (204 g) [2023-12]: Important Races: Half/Marathon. Carbon Plate.<br /> * ASICS Novablast 5 (260 g) [2025-01]: Everyday, Easy, Parkrun.<br /> * ASICS Nimbus 27 (300 g) [2025-04]: Extra cushioned, long runs.<br /> * New Balance FuelCell SuperComp Pacer V2 (209 g) [2025-05]: Important Races: 5k/10k. Carbon Plate.<br /> ** Half size up, but still too tight for long runs.<br /> * ASICS Gel Pulse 15 (260 g) [2025-09]: Walking, light runs.<br /> * ASICS SuperBlast 2 (250 g) [2026-01]: Tempo, Track, more cushioned for Half/Marathon.<br /> * Scott Supertrac RC 2 Trail (270 g) [2026-01]: Cross-Country.<br /> ** 1 size up<br /> <br /> Consider:<br /> * ASICS Metaspeed Sky/Edge Tokyo (188 g, £240): Races/speed<br /> * ASICS MegaBlast (230g, £210): Fast non-plate<br /> * ASICS Metaspeed Ride (282 g, £180)<br /> * ASICS Sonicblast Tokyo (256 g, *£170): Plate version of novablast? Tempo?<br /> * ASICS Magic Speed 4 (242 g, £160 - 15%): Plate, tempo/speed work.<br /> * ASICS Novablast 5 (260 g, *£135)<br /> * ASICS Trabuco 14 (* £140): Trail<br /> * Li-Ning Eedian 6 Elite (~200 g): Races<br /> * Li-Ning Eedian 6 Challenger (~200 g): Propulsion and stability<br /> <br /> Retired:<br /> * ASICS NovaBlast 3 (252 g) [2023-07]: Tempo/Track/Parkrun<br /> * Saucony Mens Ride 17 (282 g) [2024-03]: Easy Run, Daily<br /> * ASICS Cumulus<br /> * ASICS Nimbus 22<br /> * ASICS Nimbus 24 [2023-07]<br /> <br /> == Research ==<br /> <br /> * [https://www.researchgate.net/profile/Malcolm-Collins/publication/49674432_Increased_running_speed_and_previous_cramps_rather_than_dehydration_or_serum_sodium_changes_predict_exercise-associated_muscle_cramping_A_prospective_cohort_study_in_210_Ironman_triathletes/links/0a85e53c93b820db45000000/Increased-running-speed-and-previous-cramps-rather-than-dehydration-or-serum-sodium-changes-predict-exercise-associated-muscle-cramping-A-prospective-cohort-study-in-210-Ironman-triathletes.pdf Increased running speed and previous cramps rather than dehydration or serum sodium]<br /> <br /> == YouTube ==<br /> <br /> Runners:<br /> * [https://www.youtube.com/@BenParkes Ben Parkes]<br /> * [https://www.youtube.com/@thisisjogon Jog On]<br /> * [https://www.youtube.com/@kofuzi Kofuzi]<br /> * [https://www.youtube.com/@justalilbester Nick Bester]<br /> * [https://www.youtube.com/@PhilyBowden Phily Bowden]<br /> * [https://www.youtube.com/@RanToJapan Ran To Japan]<br /> * [https://www.youtube.com/@runningchannel The Running Channel]<br /> <br /> Physio/Coach:<br /> * [https://www.youtube.com/@SpringSnabbare Fredrik Zillén]<br /> * [https://www.youtube.com/@NicklasRossnerPT Nick Rossner]<br /> * [https://www.youtube.com/@runelitecoach Run Elite]<br /> * [https://www.youtube.com/@TheRunExperience The Run Experience]<br /> * [https://www.youtube.com/@SteveMagness Steve Magness]<br /> <br /> == Diet &amp; Supplements ==<br /> <br /> * Eat at least 2 hours before a race<br /> * Marathon/Half:<br /> ** Start taking carbs 20 mins after the start of a race<br /> ** At least 60 g / hour<br /> ** SiS GO Isotonic: 22 g carbs (general training)<br /> ** SiS Beta: 40 g carbs (important long races)<br /> * Reduce oil intake which reduces nitric oxide<br /> * Nitric oxide rich foods: rhubarb, celery, lettuce, beetroot, watermelon<br /> * Sodium<br /> ** Suggested 300 - 600 mg/hr; up to 1 g/hr on very hot days.<br /> ** 2 tablets: 200 mg<br /> * Caffeine<br /> ** 3 - 6 mg/kg -&gt; ~ 400 mg (2 tablets)<br /> ** ~ 30 - 60 mins prior to race<br /> ** ~ 6 hours half life<br /> * Turmeric<br /> ** Taken after exercise, can help with DOMS/recovery/anti-inflammatory<br /> ** Eat with black pepper or fat to aid absorption<br /> * Creatine Monohydrate<br /> ** 5 - 10 g daily<br /> * Magnesium Glycinate<br /> ** 3 g daily<br /> * Collagen<br /> ** 10 - 15 g of hydrolyzed collagen peptides<br /> ** Collagen synthesis is dependent on Vitamin C<br /> ** 30 – 60 mins before strength training<br /> ** Do not take caffeine beforehand</div>

NickPGSmith https://www.smithnet.org.uk/wiki/index.php?title=Rasberry_Pi&diff=1759 2026-06-05T13:43:54Z

<p>NickPGSmith: /* Composite Video */</p> <hr /> <div>== Device ==<br /> <br /> * [https://www.raspberrypi.com/documentation/computers/raspberry-pi.html#raspberry-pi-3-model-b Rasberry Pi 3B] (&quot;Rev 1.2&quot;)<br /> <br /> cat /proc/device-tree/model<br /> <br /> Hardware info:<br /> * AV Connector:<br /> ** 1 (tip): L Audio<br /> ** 2: R Audio<br /> ** 3: Ground<br /> ** Sleeve: Composite Video.<br /> * [https://www.raspberrypi.com/documentation/computers/raspberry-pi.html Boards]<br /> * [https://www.raspberrypi.com/documentation/computers/raspberry-pi.html#gpio GPIO Header]<br /> ** 3.3 V on data lines only<br /> ** Pin numbers differ from chip/programmatic pin numbers<br /> ** 3.3 V power lines: 150-200 mA max<br /> ** 5 V power lines: from the main PSU input (reserve 1 A for Pi itself)<br /> ** Data lines: 15 mA max per pin, 50 mA total from all pins<br /> <br /> == Rasbery Pi OS ==<br /> <br /> See [https://www.raspberrypi.com/documentation/computers/config_txt.html /boot/firmware/config.txt].<br /> <br /> Command line configuration program:<br /> raspi-config<br /> <br /> eg to enable I2C interface.<br /> <br /> Upgrade:<br /> apt update<br /> apt list --upgradeable<br /> apt upgrade -y<br /> <br /> === Apache Web Server ===<br /> <br /> apt install apache2 -y<br /> <br /> * Configuration: /etc/apache2<br /> * Serve from: /var/www/html<br /> <br /> === Composite Video ===<br /> <br /> Will default to NTSC; in /boot/firmware/cmdline.txt, add this to the end for PAL 50i:<br /> video=Composite-1:720x576@50ie<br /> <br /> Alternatives include:<br /> * NTSC: 720x480@60ie<br /> * PAL60: 720x480@60ie<br /> <br /> This will show the Pi desktop. Stop it to allow direct access to the framebuffer /dev/fb0:<br /> systemctl stop lightdm<br /> <br /> See also:<br /> raspi-config<br /> <br /> * 1 System Options -&gt; S5 Boot / Auto Login -&gt; B1 Console<br /> <br /> Can explicitly set the standard:<br /> video=Composite-1:720x576@50ie,tv_mode=PAL<br /> <br /> Alternatives:<br /> * PAL / PAL-M / PAL-N<br /> * NTSC / NTSC-J (Japan) / NTSC-443<br /> * SECAM<br /> <br /> To avoid overscan on TVs, add padding:<br /> video=Composite-1:720x576@50ie,margin_left=40,margin_right=40,margin_top=30,margin_bottom=30<br /> <br /> === Go Development ===<br /> <br /> Because of limited RAM, best to cross compile on a more powerful system:<br /> CGO_ENABLED=0 GOOS=linux GOARCH=arm GOARM=7 go build myprog.go<br /> <br /> Or install ARMv6 release:<br /> wget https://go.dev/dl/go1.26.3.linux-armv6l.tar.gz<br /> tar -C /usr/local -xzf go1.26.3.linux-armv6l.tar.gz<br /> <br /> Set environment variables:<br /> PATH=$PATH:/usr/local/go/bin<br /> GOPATH=$HOME/go<br /> <br /> === GPIO Development ===<br /> <br /> Raspberry Pi OS use the newer gpiod subsystem (which interacts with /dev/gpiochip0).<br /> <br /> In C++:<br /> apt install libgpiod-dev gpiod -y<br /> g++ -O3 prog.cpp -o prog -lgpiodcxx<br /> <br /> See [https://libgpiod.readthedocs.io/en/master/ documentation].<br /> <br /> In Python, use:<br /> apt install python3-dev -y<br /> <br /> for python gpiod bindings. See [https://pypi.org/project/gpiod/ documentation]. <br /> <br /> Or the abstraction:<br /> apt install python3-gpiozero -y<br /> <br /> In Go, use: periph.io<br /> <br /> === I2C Development ===<br /> <br /> Check devices:<br /> i2cdetect -y 1<br /> <br /> Get a byte (BME280/BMP280 chip ID register 0xD0)@<br /> i2cget -y 1 0x76 0xD0<br /> <br /> This returns 0x60 for BME280, 0x58 for BMP280) <br /> <br /> In C++:<br /> apt install libi2c-dev<br /> g++ i2c_prog.cpp -o i2c_prog -li2c<br /> <br /> === Mail ===<br /> <br /> MUA:<br /> apt install bsd-mailx<br /> apt install mutt<br /> <br /> Mount mail directory from server:<br /> mailhost:/var/spool/mail /var/mail nfs rw,nofail,noatime,_netdev,soft,intr 0 0<br /> <br /> Or use automounter (see other section). Note: UID/GID must match.<br /> <br /> Exim is the default MTA:<br /> dpkg-reconfigure exim4-config<br /> update-exim4.conf<br /> systemctl restart exim4<br /> <br /> Monitor logs:<br /> tail -f /var/log/exim4/mainlog<br /> <br /> === NFS Automounter ===<br /> <br /> apt install autofs nfs-common -y<br /> <br /> To allow remove mounts to be accessed under /net/&lt;server&gt;/&lt;export&gt;, edit /etc/auto.master and enable the host map:<br /> /net -hosts --timeout=60<br /> <br /> systemctl enable autofs<br /> systemctl restart autofs<br /> <br /> To mount remote mail directory:<br /> <br /> Create the new /etc/auto.master.d/mail.autofs file:<br /> /- /etc/auto.direct --timeout=60<br /> <br /> Create the /etc/auto.direct file:<br /> /var/mail -fstype=nfs,rw,soft,intr,tcp,rsize=8192,wsize=8192 mailhost:/var/spool/mail<br /> <br /> systemctl restart autofs<br /> <br /> === NTP Client ===<br /> <br /> apt install systemd-timesyncd -y<br /> <br /> Edit /etc/systemd/timesyncd.conf and set NTP parameter<br /> systemctl restart systemd-timesyncd<br /> timedatectl status<br /> timedatectl timesync-status<br /> <br /> === Service ===<br /> <br /> Create a service file /etc/systemd/system/temp-logger.service:<br /> [Unit]<br /> Description=CPU Temperature Logger to HTML<br /> After=network.target<br /> <br /> [Service]<br /> Type=oneshot<br /> ExecStart=/usr/local/bin/temp_logger.sh<br /> # Run as root or www-data depending on who owns your /var/www/html directory<br /> User=root<br /> <br /> Create a systemd timer /etc/systemd/system/temp-logger.timer:<br /> [Unit]<br /> Description=Run Pi Temperature Logger every 5 minutes<br /> <br /> [Timer]<br /> # Run 5 minutes after boot-up<br /> OnBootSec=5min<br /> # Run every 5 minutes relative to when the timer was started<br /> OnUnitActiveSec=5min<br /> # Ensures precision alignment to the clock wall if desired (optional)<br /> AccuracySec=1s<br /> <br /> [Install]<br /> WantedBy=timers.target<br /> <br /> Reload systemd, <br /> systemctl daemon-reload<br /> systemctl enable --now temp-logger.timer<br /> <br /> === SSH ===<br /> <br /> Copy key (and generate ~/.ssh) from client tp pi:<br /> ssh-copy-id username@raspi.example.com<br /> <br /> === Stress ===<br /> <br /> apt install stress-ng<br /> <br /> Run memory test:<br /> stress-ng --vm 1 --vm-bytes 750M --timeout 120 --vm-keep --vm-method rand-sum<br /> <br /> CPU test:<br /> stress-ng --cpu 4 --cpu-method matrixprod --timeout 300<br /> <br /> === Swap ===<br /> free -m<br /> swapon --show<br /> <br /> To see current zram configuration:<br /> zramctl <br /> zramctl --output-all /dev/zram0<br /> <br /> Configure hybrid configuration, overruding default /etc/rpi/swap.conf in /etc/rpi/swap.conf.d/hybrid-swap.conf:<br /> [Main]<br /> Mechanism=zram+file<br /> <br /> [Zram]<br /> FixedSizeMiB=512<br /> <br /> [File]<br /> FixedSizeMiB=1024<br /> <br /> Ensure systemd component is enabled and reboot:<br /> systemctl enable var-swap.swap<br /> <br /> There is no need to recreate/resize the /var/swap physical file, which is done at boot time if necessary. In this mode, file system swap will not be visible with swapon; instead it is owned by the zram kernel driver. Zram blocks are pushed to/from file as needed.<br /> <br /> === Temperature ===<br /> <br /> echo &quot;scale=2; $(cat /sys/class/thermal/thermal_zone0/temp) / 1000&quot; | bc<br /> <br /> CPU Core throttling above 80 C.</div>

NickPGSmith https://www.smithnet.org.uk/wiki/index.php?title=Rasberry_Pi&diff=1758 2026-06-04T20:03:43Z

<p>NickPGSmith: /* Composite Video */</p> <hr /> <div>== Device ==<br /> <br /> * [https://www.raspberrypi.com/documentation/computers/raspberry-pi.html#raspberry-pi-3-model-b Rasberry Pi 3B] (&quot;Rev 1.2&quot;)<br /> <br /> cat /proc/device-tree/model<br /> <br /> Hardware info:<br /> * AV Connector:<br /> ** 1 (tip): L Audio<br /> ** 2: R Audio<br /> ** 3: Ground<br /> ** Sleeve: Composite Video.<br /> * [https://www.raspberrypi.com/documentation/computers/raspberry-pi.html Boards]<br /> * [https://www.raspberrypi.com/documentation/computers/raspberry-pi.html#gpio GPIO Header]<br /> ** 3.3 V on data lines only<br /> ** Pin numbers differ from chip/programmatic pin numbers<br /> ** 3.3 V power lines: 150-200 mA max<br /> ** 5 V power lines: from the main PSU input (reserve 1 A for Pi itself)<br /> ** Data lines: 15 mA max per pin, 50 mA total from all pins<br /> <br /> == Rasbery Pi OS ==<br /> <br /> See [https://www.raspberrypi.com/documentation/computers/config_txt.html /boot/firmware/config.txt].<br /> <br /> Command line configuration program:<br /> raspi-config<br /> <br /> eg to enable I2C interface.<br /> <br /> Upgrade:<br /> apt update<br /> apt list --upgradeable<br /> apt upgrade -y<br /> <br /> === Apache Web Server ===<br /> <br /> apt install apache2 -y<br /> <br /> * Configuration: /etc/apache2<br /> * Serve from: /var/www/html<br /> <br /> === Composite Video ===<br /> <br /> Will default to NTSC; in /boot/firmware/cmdline.txt, add this to the end for PAL 50i:<br /> video=Composite-1:720x576@50ie<br /> <br /> This will show the Pi desktop. Stop it to allow direct access to the framebuffer /dev/fb0:<br /> systemctl stop lightdm<br /> <br /> See also:<br /> raspi-config<br /> <br /> * 1 System Options -&gt; S5 Boot / Auto Login -&gt; B1 Console<br /> <br /> === Go Development ===<br /> <br /> Because of limited RAM, best to cross compile on a more powerful system:<br /> CGO_ENABLED=0 GOOS=linux GOARCH=arm GOARM=7 go build myprog.go<br /> <br /> Or install ARMv6 release:<br /> wget https://go.dev/dl/go1.26.3.linux-armv6l.tar.gz<br /> tar -C /usr/local -xzf go1.26.3.linux-armv6l.tar.gz<br /> <br /> Set environment variables:<br /> PATH=$PATH:/usr/local/go/bin<br /> GOPATH=$HOME/go<br /> <br /> === GPIO Development ===<br /> <br /> Raspberry Pi OS use the newer gpiod subsystem (which interacts with /dev/gpiochip0).<br /> <br /> In C++:<br /> apt install libgpiod-dev gpiod -y<br /> g++ -O3 prog.cpp -o prog -lgpiodcxx<br /> <br /> See [https://libgpiod.readthedocs.io/en/master/ documentation].<br /> <br /> In Python, use:<br /> apt install python3-dev -y<br /> <br /> for python gpiod bindings. See [https://pypi.org/project/gpiod/ documentation]. <br /> <br /> Or the abstraction:<br /> apt install python3-gpiozero -y<br /> <br /> In Go, use: periph.io<br /> <br /> === I2C Development ===<br /> <br /> Check devices:<br /> i2cdetect -y 1<br /> <br /> Get a byte (BME280/BMP280 chip ID register 0xD0)@<br /> i2cget -y 1 0x76 0xD0<br /> <br /> This returns 0x60 for BME280, 0x58 for BMP280) <br /> <br /> In C++:<br /> apt install libi2c-dev<br /> g++ i2c_prog.cpp -o i2c_prog -li2c<br /> <br /> === Mail ===<br /> <br /> MUA:<br /> apt install bsd-mailx<br /> apt install mutt<br /> <br /> Mount mail directory from server:<br /> mailhost:/var/spool/mail /var/mail nfs rw,nofail,noatime,_netdev,soft,intr 0 0<br /> <br /> Or use automounter (see other section). Note: UID/GID must match.<br /> <br /> Exim is the default MTA:<br /> dpkg-reconfigure exim4-config<br /> update-exim4.conf<br /> systemctl restart exim4<br /> <br /> Monitor logs:<br /> tail -f /var/log/exim4/mainlog<br /> <br /> === NFS Automounter ===<br /> <br /> apt install autofs nfs-common -y<br /> <br /> To allow remove mounts to be accessed under /net/&lt;server&gt;/&lt;export&gt;, edit /etc/auto.master and enable the host map:<br /> /net -hosts --timeout=60<br /> <br /> systemctl enable autofs<br /> systemctl restart autofs<br /> <br /> To mount remote mail directory:<br /> <br /> Create the new /etc/auto.master.d/mail.autofs file:<br /> /- /etc/auto.direct --timeout=60<br /> <br /> Create the /etc/auto.direct file:<br /> /var/mail -fstype=nfs,rw,soft,intr,tcp,rsize=8192,wsize=8192 mailhost:/var/spool/mail<br /> <br /> systemctl restart autofs<br /> <br /> === NTP Client ===<br /> <br /> apt install systemd-timesyncd -y<br /> <br /> Edit /etc/systemd/timesyncd.conf and set NTP parameter<br /> systemctl restart systemd-timesyncd<br /> timedatectl status<br /> timedatectl timesync-status<br /> <br /> === Service ===<br /> <br /> Create a service file /etc/systemd/system/temp-logger.service:<br /> [Unit]<br /> Description=CPU Temperature Logger to HTML<br /> After=network.target<br /> <br /> [Service]<br /> Type=oneshot<br /> ExecStart=/usr/local/bin/temp_logger.sh<br /> # Run as root or www-data depending on who owns your /var/www/html directory<br /> User=root<br /> <br /> Create a systemd timer /etc/systemd/system/temp-logger.timer:<br /> [Unit]<br /> Description=Run Pi Temperature Logger every 5 minutes<br /> <br /> [Timer]<br /> # Run 5 minutes after boot-up<br /> OnBootSec=5min<br /> # Run every 5 minutes relative to when the timer was started<br /> OnUnitActiveSec=5min<br /> # Ensures precision alignment to the clock wall if desired (optional)<br /> AccuracySec=1s<br /> <br /> [Install]<br /> WantedBy=timers.target<br /> <br /> Reload systemd, <br /> systemctl daemon-reload<br /> systemctl enable --now temp-logger.timer<br /> <br /> === SSH ===<br /> <br /> Copy key (and generate ~/.ssh) from client tp pi:<br /> ssh-copy-id username@raspi.example.com<br /> <br /> === Stress ===<br /> <br /> apt install stress-ng<br /> <br /> Run memory test:<br /> stress-ng --vm 1 --vm-bytes 750M --timeout 120 --vm-keep --vm-method rand-sum<br /> <br /> CPU test:<br /> stress-ng --cpu 4 --cpu-method matrixprod --timeout 300<br /> <br /> === Swap ===<br /> free -m<br /> swapon --show<br /> <br /> To see current zram configuration:<br /> zramctl <br /> zramctl --output-all /dev/zram0<br /> <br /> Configure hybrid configuration, overruding default /etc/rpi/swap.conf in /etc/rpi/swap.conf.d/hybrid-swap.conf:<br /> [Main]<br /> Mechanism=zram+file<br /> <br /> [Zram]<br /> FixedSizeMiB=512<br /> <br /> [File]<br /> FixedSizeMiB=1024<br /> <br /> Ensure systemd component is enabled and reboot:<br /> systemctl enable var-swap.swap<br /> <br /> There is no need to recreate/resize the /var/swap physical file, which is done at boot time if necessary. In this mode, file system swap will not be visible with swapon; instead it is owned by the zram kernel driver. Zram blocks are pushed to/from file as needed.<br /> <br /> === Temperature ===<br /> <br /> echo &quot;scale=2; $(cat /sys/class/thermal/thermal_zone0/temp) / 1000&quot; | bc<br /> <br /> CPU Core throttling above 80 C.</div>

NickPGSmith https://www.smithnet.org.uk/wiki/index.php?title=Rasberry_Pi&diff=1757 2026-06-04T19:52:45Z

<p>NickPGSmith: /* Composite Video */</p> <hr /> <div>== Device ==<br /> <br /> * [https://www.raspberrypi.com/documentation/computers/raspberry-pi.html#raspberry-pi-3-model-b Rasberry Pi 3B] (&quot;Rev 1.2&quot;)<br /> <br /> cat /proc/device-tree/model<br /> <br /> Hardware info:<br /> * AV Connector:<br /> ** 1 (tip): L Audio<br /> ** 2: R Audio<br /> ** 3: Ground<br /> ** Sleeve: Composite Video.<br /> * [https://www.raspberrypi.com/documentation/computers/raspberry-pi.html Boards]<br /> * [https://www.raspberrypi.com/documentation/computers/raspberry-pi.html#gpio GPIO Header]<br /> ** 3.3 V on data lines only<br /> ** Pin numbers differ from chip/programmatic pin numbers<br /> ** 3.3 V power lines: 150-200 mA max<br /> ** 5 V power lines: from the main PSU input (reserve 1 A for Pi itself)<br /> ** Data lines: 15 mA max per pin, 50 mA total from all pins<br /> <br /> == Rasbery Pi OS ==<br /> <br /> See [https://www.raspberrypi.com/documentation/computers/config_txt.html /boot/firmware/config.txt].<br /> <br /> Command line configuration program:<br /> raspi-config<br /> <br /> eg to enable I2C interface.<br /> <br /> Upgrade:<br /> apt update<br /> apt list --upgradeable<br /> apt upgrade -y<br /> <br /> === Apache Web Server ===<br /> <br /> apt install apache2 -y<br /> <br /> * Configuration: /etc/apache2<br /> * Serve from: /var/www/html<br /> <br /> === Composite Video ===<br /> <br /> Will default to NTSC; in /boot/firmware/cmdline.txt, add this to the end for PAL 50i:<br /> video=Composite-1:720x576@50ie<br /> <br /> === Go Development ===<br /> <br /> Because of limited RAM, best to cross compile on a more powerful system:<br /> CGO_ENABLED=0 GOOS=linux GOARCH=arm GOARM=7 go build myprog.go<br /> <br /> Or install ARMv6 release:<br /> wget https://go.dev/dl/go1.26.3.linux-armv6l.tar.gz<br /> tar -C /usr/local -xzf go1.26.3.linux-armv6l.tar.gz<br /> <br /> Set environment variables:<br /> PATH=$PATH:/usr/local/go/bin<br /> GOPATH=$HOME/go<br /> <br /> === GPIO Development ===<br /> <br /> Raspberry Pi OS use the newer gpiod subsystem (which interacts with /dev/gpiochip0).<br /> <br /> In C++:<br /> apt install libgpiod-dev gpiod -y<br /> g++ -O3 prog.cpp -o prog -lgpiodcxx<br /> <br /> See [https://libgpiod.readthedocs.io/en/master/ documentation].<br /> <br /> In Python, use:<br /> apt install python3-dev -y<br /> <br /> for python gpiod bindings. See [https://pypi.org/project/gpiod/ documentation]. <br /> <br /> Or the abstraction:<br /> apt install python3-gpiozero -y<br /> <br /> In Go, use: periph.io<br /> <br /> === I2C Development ===<br /> <br /> Check devices:<br /> i2cdetect -y 1<br /> <br /> Get a byte (BME280/BMP280 chip ID register 0xD0)@<br /> i2cget -y 1 0x76 0xD0<br /> <br /> This returns 0x60 for BME280, 0x58 for BMP280) <br /> <br /> In C++:<br /> apt install libi2c-dev<br /> g++ i2c_prog.cpp -o i2c_prog -li2c<br /> <br /> === Mail ===<br /> <br /> MUA:<br /> apt install bsd-mailx<br /> apt install mutt<br /> <br /> Mount mail directory from server:<br /> mailhost:/var/spool/mail /var/mail nfs rw,nofail,noatime,_netdev,soft,intr 0 0<br /> <br /> Or use automounter (see other section). Note: UID/GID must match.<br /> <br /> Exim is the default MTA:<br /> dpkg-reconfigure exim4-config<br /> update-exim4.conf<br /> systemctl restart exim4<br /> <br /> Monitor logs:<br /> tail -f /var/log/exim4/mainlog<br /> <br /> === NFS Automounter ===<br /> <br /> apt install autofs nfs-common -y<br /> <br /> To allow remove mounts to be accessed under /net/&lt;server&gt;/&lt;export&gt;, edit /etc/auto.master and enable the host map:<br /> /net -hosts --timeout=60<br /> <br /> systemctl enable autofs<br /> systemctl restart autofs<br /> <br /> To mount remote mail directory:<br /> <br /> Create the new /etc/auto.master.d/mail.autofs file:<br /> /- /etc/auto.direct --timeout=60<br /> <br /> Create the /etc/auto.direct file:<br /> /var/mail -fstype=nfs,rw,soft,intr,tcp,rsize=8192,wsize=8192 mailhost:/var/spool/mail<br /> <br /> systemctl restart autofs<br /> <br /> === NTP Client ===<br /> <br /> apt install systemd-timesyncd -y<br /> <br /> Edit /etc/systemd/timesyncd.conf and set NTP parameter<br /> systemctl restart systemd-timesyncd<br /> timedatectl status<br /> timedatectl timesync-status<br /> <br /> === Service ===<br /> <br /> Create a service file /etc/systemd/system/temp-logger.service:<br /> [Unit]<br /> Description=CPU Temperature Logger to HTML<br /> After=network.target<br /> <br /> [Service]<br /> Type=oneshot<br /> ExecStart=/usr/local/bin/temp_logger.sh<br /> # Run as root or www-data depending on who owns your /var/www/html directory<br /> User=root<br /> <br /> Create a systemd timer /etc/systemd/system/temp-logger.timer:<br /> [Unit]<br /> Description=Run Pi Temperature Logger every 5 minutes<br /> <br /> [Timer]<br /> # Run 5 minutes after boot-up<br /> OnBootSec=5min<br /> # Run every 5 minutes relative to when the timer was started<br /> OnUnitActiveSec=5min<br /> # Ensures precision alignment to the clock wall if desired (optional)<br /> AccuracySec=1s<br /> <br /> [Install]<br /> WantedBy=timers.target<br /> <br /> Reload systemd, <br /> systemctl daemon-reload<br /> systemctl enable --now temp-logger.timer<br /> <br /> === SSH ===<br /> <br /> Copy key (and generate ~/.ssh) from client tp pi:<br /> ssh-copy-id username@raspi.example.com<br /> <br /> === Stress ===<br /> <br /> apt install stress-ng<br /> <br /> Run memory test:<br /> stress-ng --vm 1 --vm-bytes 750M --timeout 120 --vm-keep --vm-method rand-sum<br /> <br /> CPU test:<br /> stress-ng --cpu 4 --cpu-method matrixprod --timeout 300<br /> <br /> === Swap ===<br /> free -m<br /> swapon --show<br /> <br /> To see current zram configuration:<br /> zramctl <br /> zramctl --output-all /dev/zram0<br /> <br /> Configure hybrid configuration, overruding default /etc/rpi/swap.conf in /etc/rpi/swap.conf.d/hybrid-swap.conf:<br /> [Main]<br /> Mechanism=zram+file<br /> <br /> [Zram]<br /> FixedSizeMiB=512<br /> <br /> [File]<br /> FixedSizeMiB=1024<br /> <br /> Ensure systemd component is enabled and reboot:<br /> systemctl enable var-swap.swap<br /> <br /> There is no need to recreate/resize the /var/swap physical file, which is done at boot time if necessary. In this mode, file system swap will not be visible with swapon; instead it is owned by the zram kernel driver. Zram blocks are pushed to/from file as needed.<br /> <br /> === Temperature ===<br /> <br /> echo &quot;scale=2; $(cat /sys/class/thermal/thermal_zone0/temp) / 1000&quot; | bc<br /> <br /> CPU Core throttling above 80 C.</div>

NickPGSmith https://www.smithnet.org.uk/wiki/index.php?title=Rasberry_Pi&diff=1756 2026-06-02T15:03:40Z

<p>NickPGSmith: /* Stress */</p> <hr /> <div>== Device ==<br /> <br /> * [https://www.raspberrypi.com/documentation/computers/raspberry-pi.html#raspberry-pi-3-model-b Rasberry Pi 3B] (&quot;Rev 1.2&quot;)<br /> <br /> cat /proc/device-tree/model<br /> <br /> Hardware info:<br /> * AV Connector:<br /> ** 1 (tip): L Audio<br /> ** 2: R Audio<br /> ** 3: Ground<br /> ** Sleeve: Composite Video.<br /> * [https://www.raspberrypi.com/documentation/computers/raspberry-pi.html Boards]<br /> * [https://www.raspberrypi.com/documentation/computers/raspberry-pi.html#gpio GPIO Header]<br /> ** 3.3 V on data lines only<br /> ** Pin numbers differ from chip/programmatic pin numbers<br /> ** 3.3 V power lines: 150-200 mA max<br /> ** 5 V power lines: from the main PSU input (reserve 1 A for Pi itself)<br /> ** Data lines: 15 mA max per pin, 50 mA total from all pins<br /> <br /> == Rasbery Pi OS ==<br /> <br /> See [https://www.raspberrypi.com/documentation/computers/config_txt.html /boot/firmware/config.txt].<br /> <br /> Command line configuration program:<br /> raspi-config<br /> <br /> eg to enable I2C interface.<br /> <br /> Upgrade:<br /> apt update<br /> apt list --upgradeable<br /> apt upgrade -y<br /> <br /> === Apache Web Server ===<br /> <br /> apt install apache2 -y<br /> <br /> * Configuration: /etc/apache2<br /> * Serve from: /var/www/html<br /> <br /> === Composite Video ===<br /> <br /> In /boot/firmware/config.txt:<br /> enable_tvout=1<br /> dtoverlay=vc4-kms-v3d,composite<br /> <br /> Ensure hdmi_force_hotplug=1 is commented out or set to 0.<br /> <br /> In /boot/firmware/cmdline.txt, either:<br /> vc4.tv_norm=PAL<br /> vc4.tv_norm=NTSC<br /> <br /> To control overscan, see settings:<br /> margin_left<br /> margin_right<br /> <br /> === Go Development ===<br /> <br /> Because of limited RAM, best to cross compile on a more powerful system:<br /> CGO_ENABLED=0 GOOS=linux GOARCH=arm GOARM=7 go build myprog.go<br /> <br /> Or install ARMv6 release:<br /> wget https://go.dev/dl/go1.26.3.linux-armv6l.tar.gz<br /> tar -C /usr/local -xzf go1.26.3.linux-armv6l.tar.gz<br /> <br /> Set environment variables:<br /> PATH=$PATH:/usr/local/go/bin<br /> GOPATH=$HOME/go<br /> <br /> === GPIO Development ===<br /> <br /> Raspberry Pi OS use the newer gpiod subsystem (which interacts with /dev/gpiochip0).<br /> <br /> In C++:<br /> apt install libgpiod-dev gpiod -y<br /> g++ -O3 prog.cpp -o prog -lgpiodcxx<br /> <br /> See [https://libgpiod.readthedocs.io/en/master/ documentation].<br /> <br /> In Python, use:<br /> apt install python3-dev -y<br /> <br /> for python gpiod bindings. See [https://pypi.org/project/gpiod/ documentation]. <br /> <br /> Or the abstraction:<br /> apt install python3-gpiozero -y<br /> <br /> In Go, use: periph.io<br /> <br /> === I2C Development ===<br /> <br /> Check devices:<br /> i2cdetect -y 1<br /> <br /> Get a byte (BME280/BMP280 chip ID register 0xD0)@<br /> i2cget -y 1 0x76 0xD0<br /> <br /> This returns 0x60 for BME280, 0x58 for BMP280) <br /> <br /> In C++:<br /> apt install libi2c-dev<br /> g++ i2c_prog.cpp -o i2c_prog -li2c<br /> <br /> === Mail ===<br /> <br /> MUA:<br /> apt install bsd-mailx<br /> apt install mutt<br /> <br /> Mount mail directory from server:<br /> mailhost:/var/spool/mail /var/mail nfs rw,nofail,noatime,_netdev,soft,intr 0 0<br /> <br /> Or use automounter (see other section). Note: UID/GID must match.<br /> <br /> Exim is the default MTA:<br /> dpkg-reconfigure exim4-config<br /> update-exim4.conf<br /> systemctl restart exim4<br /> <br /> Monitor logs:<br /> tail -f /var/log/exim4/mainlog<br /> <br /> === NFS Automounter ===<br /> <br /> apt install autofs nfs-common -y<br /> <br /> To allow remove mounts to be accessed under /net/&lt;server&gt;/&lt;export&gt;, edit /etc/auto.master and enable the host map:<br /> /net -hosts --timeout=60<br /> <br /> systemctl enable autofs<br /> systemctl restart autofs<br /> <br /> To mount remote mail directory:<br /> <br /> Create the new /etc/auto.master.d/mail.autofs file:<br /> /- /etc/auto.direct --timeout=60<br /> <br /> Create the /etc/auto.direct file:<br /> /var/mail -fstype=nfs,rw,soft,intr,tcp,rsize=8192,wsize=8192 mailhost:/var/spool/mail<br /> <br /> systemctl restart autofs<br /> <br /> === NTP Client ===<br /> <br /> apt install systemd-timesyncd -y<br /> <br /> Edit /etc/systemd/timesyncd.conf and set NTP parameter<br /> systemctl restart systemd-timesyncd<br /> timedatectl status<br /> timedatectl timesync-status<br /> <br /> === Service ===<br /> <br /> Create a service file /etc/systemd/system/temp-logger.service:<br /> [Unit]<br /> Description=CPU Temperature Logger to HTML<br /> After=network.target<br /> <br /> [Service]<br /> Type=oneshot<br /> ExecStart=/usr/local/bin/temp_logger.sh<br /> # Run as root or www-data depending on who owns your /var/www/html directory<br /> User=root<br /> <br /> Create a systemd timer /etc/systemd/system/temp-logger.timer:<br /> [Unit]<br /> Description=Run Pi Temperature Logger every 5 minutes<br /> <br /> [Timer]<br /> # Run 5 minutes after boot-up<br /> OnBootSec=5min<br /> # Run every 5 minutes relative to when the timer was started<br /> OnUnitActiveSec=5min<br /> # Ensures precision alignment to the clock wall if desired (optional)<br /> AccuracySec=1s<br /> <br /> [Install]<br /> WantedBy=timers.target<br /> <br /> Reload systemd, <br /> systemctl daemon-reload<br /> systemctl enable --now temp-logger.timer<br /> <br /> === SSH ===<br /> <br /> Copy key (and generate ~/.ssh) from client tp pi:<br /> ssh-copy-id username@raspi.example.com<br /> <br /> === Stress ===<br /> <br /> apt install stress-ng<br /> <br /> Run memory test:<br /> stress-ng --vm 1 --vm-bytes 750M --timeout 120 --vm-keep --vm-method rand-sum<br /> <br /> CPU test:<br /> stress-ng --cpu 4 --cpu-method matrixprod --timeout 300<br /> <br /> === Swap ===<br /> free -m<br /> swapon --show<br /> <br /> To see current zram configuration:<br /> zramctl <br /> zramctl --output-all /dev/zram0<br /> <br /> Configure hybrid configuration, overruding default /etc/rpi/swap.conf in /etc/rpi/swap.conf.d/hybrid-swap.conf:<br /> [Main]<br /> Mechanism=zram+file<br /> <br /> [Zram]<br /> FixedSizeMiB=512<br /> <br /> [File]<br /> FixedSizeMiB=1024<br /> <br /> Ensure systemd component is enabled and reboot:<br /> systemctl enable var-swap.swap<br /> <br /> There is no need to recreate/resize the /var/swap physical file, which is done at boot time if necessary. In this mode, file system swap will not be visible with swapon; instead it is owned by the zram kernel driver. Zram blocks are pushed to/from file as needed.<br /> <br /> === Temperature ===<br /> <br /> echo &quot;scale=2; $(cat /sys/class/thermal/thermal_zone0/temp) / 1000&quot; | bc<br /> <br /> CPU Core throttling above 80 C.</div>

NickPGSmith https://www.smithnet.org.uk/wiki/index.php?title=Rasberry_Pi&diff=1755 2026-06-02T14:46:03Z

<p>NickPGSmith: /* I2C Development */</p> <hr /> <div>== Device ==<br /> <br /> * [https://www.raspberrypi.com/documentation/computers/raspberry-pi.html#raspberry-pi-3-model-b Rasberry Pi 3B] (&quot;Rev 1.2&quot;)<br /> <br /> cat /proc/device-tree/model<br /> <br /> Hardware info:<br /> * AV Connector:<br /> ** 1 (tip): L Audio<br /> ** 2: R Audio<br /> ** 3: Ground<br /> ** Sleeve: Composite Video.<br /> * [https://www.raspberrypi.com/documentation/computers/raspberry-pi.html Boards]<br /> * [https://www.raspberrypi.com/documentation/computers/raspberry-pi.html#gpio GPIO Header]<br /> ** 3.3 V on data lines only<br /> ** Pin numbers differ from chip/programmatic pin numbers<br /> ** 3.3 V power lines: 150-200 mA max<br /> ** 5 V power lines: from the main PSU input (reserve 1 A for Pi itself)<br /> ** Data lines: 15 mA max per pin, 50 mA total from all pins<br /> <br /> == Rasbery Pi OS ==<br /> <br /> See [https://www.raspberrypi.com/documentation/computers/config_txt.html /boot/firmware/config.txt].<br /> <br /> Command line configuration program:<br /> raspi-config<br /> <br /> eg to enable I2C interface.<br /> <br /> Upgrade:<br /> apt update<br /> apt list --upgradeable<br /> apt upgrade -y<br /> <br /> === Apache Web Server ===<br /> <br /> apt install apache2 -y<br /> <br /> * Configuration: /etc/apache2<br /> * Serve from: /var/www/html<br /> <br /> === Composite Video ===<br /> <br /> In /boot/firmware/config.txt:<br /> enable_tvout=1<br /> dtoverlay=vc4-kms-v3d,composite<br /> <br /> Ensure hdmi_force_hotplug=1 is commented out or set to 0.<br /> <br /> In /boot/firmware/cmdline.txt, either:<br /> vc4.tv_norm=PAL<br /> vc4.tv_norm=NTSC<br /> <br /> To control overscan, see settings:<br /> margin_left<br /> margin_right<br /> <br /> === Go Development ===<br /> <br /> Because of limited RAM, best to cross compile on a more powerful system:<br /> CGO_ENABLED=0 GOOS=linux GOARCH=arm GOARM=7 go build myprog.go<br /> <br /> Or install ARMv6 release:<br /> wget https://go.dev/dl/go1.26.3.linux-armv6l.tar.gz<br /> tar -C /usr/local -xzf go1.26.3.linux-armv6l.tar.gz<br /> <br /> Set environment variables:<br /> PATH=$PATH:/usr/local/go/bin<br /> GOPATH=$HOME/go<br /> <br /> === GPIO Development ===<br /> <br /> Raspberry Pi OS use the newer gpiod subsystem (which interacts with /dev/gpiochip0).<br /> <br /> In C++:<br /> apt install libgpiod-dev gpiod -y<br /> g++ -O3 prog.cpp -o prog -lgpiodcxx<br /> <br /> See [https://libgpiod.readthedocs.io/en/master/ documentation].<br /> <br /> In Python, use:<br /> apt install python3-dev -y<br /> <br /> for python gpiod bindings. See [https://pypi.org/project/gpiod/ documentation]. <br /> <br /> Or the abstraction:<br /> apt install python3-gpiozero -y<br /> <br /> In Go, use: periph.io<br /> <br /> === I2C Development ===<br /> <br /> Check devices:<br /> i2cdetect -y 1<br /> <br /> Get a byte (BME280/BMP280 chip ID register 0xD0)@<br /> i2cget -y 1 0x76 0xD0<br /> <br /> This returns 0x60 for BME280, 0x58 for BMP280) <br /> <br /> In C++:<br /> apt install libi2c-dev<br /> g++ i2c_prog.cpp -o i2c_prog -li2c<br /> <br /> === Mail ===<br /> <br /> MUA:<br /> apt install bsd-mailx<br /> apt install mutt<br /> <br /> Mount mail directory from server:<br /> mailhost:/var/spool/mail /var/mail nfs rw,nofail,noatime,_netdev,soft,intr 0 0<br /> <br /> Or use automounter (see other section). Note: UID/GID must match.<br /> <br /> Exim is the default MTA:<br /> dpkg-reconfigure exim4-config<br /> update-exim4.conf<br /> systemctl restart exim4<br /> <br /> Monitor logs:<br /> tail -f /var/log/exim4/mainlog<br /> <br /> === NFS Automounter ===<br /> <br /> apt install autofs nfs-common -y<br /> <br /> To allow remove mounts to be accessed under /net/&lt;server&gt;/&lt;export&gt;, edit /etc/auto.master and enable the host map:<br /> /net -hosts --timeout=60<br /> <br /> systemctl enable autofs<br /> systemctl restart autofs<br /> <br /> To mount remote mail directory:<br /> <br /> Create the new /etc/auto.master.d/mail.autofs file:<br /> /- /etc/auto.direct --timeout=60<br /> <br /> Create the /etc/auto.direct file:<br /> /var/mail -fstype=nfs,rw,soft,intr,tcp,rsize=8192,wsize=8192 mailhost:/var/spool/mail<br /> <br /> systemctl restart autofs<br /> <br /> === NTP Client ===<br /> <br /> apt install systemd-timesyncd -y<br /> <br /> Edit /etc/systemd/timesyncd.conf and set NTP parameter<br /> systemctl restart systemd-timesyncd<br /> timedatectl status<br /> timedatectl timesync-status<br /> <br /> === Service ===<br /> <br /> Create a service file /etc/systemd/system/temp-logger.service:<br /> [Unit]<br /> Description=CPU Temperature Logger to HTML<br /> After=network.target<br /> <br /> [Service]<br /> Type=oneshot<br /> ExecStart=/usr/local/bin/temp_logger.sh<br /> # Run as root or www-data depending on who owns your /var/www/html directory<br /> User=root<br /> <br /> Create a systemd timer /etc/systemd/system/temp-logger.timer:<br /> [Unit]<br /> Description=Run Pi Temperature Logger every 5 minutes<br /> <br /> [Timer]<br /> # Run 5 minutes after boot-up<br /> OnBootSec=5min<br /> # Run every 5 minutes relative to when the timer was started<br /> OnUnitActiveSec=5min<br /> # Ensures precision alignment to the clock wall if desired (optional)<br /> AccuracySec=1s<br /> <br /> [Install]<br /> WantedBy=timers.target<br /> <br /> Reload systemd, <br /> systemctl daemon-reload<br /> systemctl enable --now temp-logger.timer<br /> <br /> === SSH ===<br /> <br /> Copy key (and generate ~/.ssh) from client tp pi:<br /> ssh-copy-id username@raspi.example.com<br /> <br /> === Stress ===<br /> <br /> apt install stress-ng<br /> <br /> Run memory test:<br /> stress-ng --vm 1 --vm-bytes 750M --timeout 120s --vm-keep --vm-method rand-sum<br /> <br /> === Swap ===<br /> free -m<br /> swapon --show<br /> <br /> To see current zram configuration:<br /> zramctl <br /> zramctl --output-all /dev/zram0<br /> <br /> Configure hybrid configuration, overruding default /etc/rpi/swap.conf in /etc/rpi/swap.conf.d/hybrid-swap.conf:<br /> [Main]<br /> Mechanism=zram+file<br /> <br /> [Zram]<br /> FixedSizeMiB=512<br /> <br /> [File]<br /> FixedSizeMiB=1024<br /> <br /> Ensure systemd component is enabled and reboot:<br /> systemctl enable var-swap.swap<br /> <br /> There is no need to recreate/resize the /var/swap physical file, which is done at boot time if necessary. In this mode, file system swap will not be visible with swapon; instead it is owned by the zram kernel driver. Zram blocks are pushed to/from file as needed.<br /> <br /> === Temperature ===<br /> <br /> echo &quot;scale=2; $(cat /sys/class/thermal/thermal_zone0/temp) / 1000&quot; | bc<br /> <br /> CPU Core throttling above 80 C.</div>

NickPGSmith https://www.smithnet.org.uk/wiki/index.php?title=Rasberry_Pi&diff=1754 2026-06-02T13:30:32Z

<p>NickPGSmith: </p> <hr /> <div>== Device ==<br /> <br /> * [https://www.raspberrypi.com/documentation/computers/raspberry-pi.html#raspberry-pi-3-model-b Rasberry Pi 3B] (&quot;Rev 1.2&quot;)<br /> <br /> cat /proc/device-tree/model<br /> <br /> Hardware info:<br /> * AV Connector:<br /> ** 1 (tip): L Audio<br /> ** 2: R Audio<br /> ** 3: Ground<br /> ** Sleeve: Composite Video.<br /> * [https://www.raspberrypi.com/documentation/computers/raspberry-pi.html Boards]<br /> * [https://www.raspberrypi.com/documentation/computers/raspberry-pi.html#gpio GPIO Header]<br /> ** 3.3 V on data lines only<br /> ** Pin numbers differ from chip/programmatic pin numbers<br /> ** 3.3 V power lines: 150-200 mA max<br /> ** 5 V power lines: from the main PSU input (reserve 1 A for Pi itself)<br /> ** Data lines: 15 mA max per pin, 50 mA total from all pins<br /> <br /> == Rasbery Pi OS ==<br /> <br /> See [https://www.raspberrypi.com/documentation/computers/config_txt.html /boot/firmware/config.txt].<br /> <br /> Command line configuration program:<br /> raspi-config<br /> <br /> eg to enable I2C interface.<br /> <br /> Upgrade:<br /> apt update<br /> apt list --upgradeable<br /> apt upgrade -y<br /> <br /> === Apache Web Server ===<br /> <br /> apt install apache2 -y<br /> <br /> * Configuration: /etc/apache2<br /> * Serve from: /var/www/html<br /> <br /> === Composite Video ===<br /> <br /> In /boot/firmware/config.txt:<br /> enable_tvout=1<br /> dtoverlay=vc4-kms-v3d,composite<br /> <br /> Ensure hdmi_force_hotplug=1 is commented out or set to 0.<br /> <br /> In /boot/firmware/cmdline.txt, either:<br /> vc4.tv_norm=PAL<br /> vc4.tv_norm=NTSC<br /> <br /> To control overscan, see settings:<br /> margin_left<br /> margin_right<br /> <br /> === Go Development ===<br /> <br /> Because of limited RAM, best to cross compile on a more powerful system:<br /> CGO_ENABLED=0 GOOS=linux GOARCH=arm GOARM=7 go build myprog.go<br /> <br /> Or install ARMv6 release:<br /> wget https://go.dev/dl/go1.26.3.linux-armv6l.tar.gz<br /> tar -C /usr/local -xzf go1.26.3.linux-armv6l.tar.gz<br /> <br /> Set environment variables:<br /> PATH=$PATH:/usr/local/go/bin<br /> GOPATH=$HOME/go<br /> <br /> === GPIO Development ===<br /> <br /> Raspberry Pi OS use the newer gpiod subsystem (which interacts with /dev/gpiochip0).<br /> <br /> In C++:<br /> apt install libgpiod-dev gpiod -y<br /> g++ -O3 prog.cpp -o prog -lgpiodcxx<br /> <br /> See [https://libgpiod.readthedocs.io/en/master/ documentation].<br /> <br /> In Python, use:<br /> apt install python3-dev -y<br /> <br /> for python gpiod bindings. See [https://pypi.org/project/gpiod/ documentation]. <br /> <br /> Or the abstraction:<br /> apt install python3-gpiozero -y<br /> <br /> In Go, use: periph.io<br /> <br /> === I2C Development ===<br /> <br /> Check devices:<br /> i2cdetect -y 1<br /> <br /> In C++:<br /> apt install libi2c-dev<br /> g++ i2c_prog.cpp -o i2c_prog -li2c<br /> <br /> === Mail ===<br /> <br /> MUA:<br /> apt install bsd-mailx<br /> apt install mutt<br /> <br /> Mount mail directory from server:<br /> mailhost:/var/spool/mail /var/mail nfs rw,nofail,noatime,_netdev,soft,intr 0 0<br /> <br /> Or use automounter (see other section). Note: UID/GID must match.<br /> <br /> Exim is the default MTA:<br /> dpkg-reconfigure exim4-config<br /> update-exim4.conf<br /> systemctl restart exim4<br /> <br /> Monitor logs:<br /> tail -f /var/log/exim4/mainlog<br /> <br /> === NFS Automounter ===<br /> <br /> apt install autofs nfs-common -y<br /> <br /> To allow remove mounts to be accessed under /net/&lt;server&gt;/&lt;export&gt;, edit /etc/auto.master and enable the host map:<br /> /net -hosts --timeout=60<br /> <br /> systemctl enable autofs<br /> systemctl restart autofs<br /> <br /> To mount remote mail directory:<br /> <br /> Create the new /etc/auto.master.d/mail.autofs file:<br /> /- /etc/auto.direct --timeout=60<br /> <br /> Create the /etc/auto.direct file:<br /> /var/mail -fstype=nfs,rw,soft,intr,tcp,rsize=8192,wsize=8192 mailhost:/var/spool/mail<br /> <br /> systemctl restart autofs<br /> <br /> === NTP Client ===<br /> <br /> apt install systemd-timesyncd -y<br /> <br /> Edit /etc/systemd/timesyncd.conf and set NTP parameter<br /> systemctl restart systemd-timesyncd<br /> timedatectl status<br /> timedatectl timesync-status<br /> <br /> === Service ===<br /> <br /> Create a service file /etc/systemd/system/temp-logger.service:<br /> [Unit]<br /> Description=CPU Temperature Logger to HTML<br /> After=network.target<br /> <br /> [Service]<br /> Type=oneshot<br /> ExecStart=/usr/local/bin/temp_logger.sh<br /> # Run as root or www-data depending on who owns your /var/www/html directory<br /> User=root<br /> <br /> Create a systemd timer /etc/systemd/system/temp-logger.timer:<br /> [Unit]<br /> Description=Run Pi Temperature Logger every 5 minutes<br /> <br /> [Timer]<br /> # Run 5 minutes after boot-up<br /> OnBootSec=5min<br /> # Run every 5 minutes relative to when the timer was started<br /> OnUnitActiveSec=5min<br /> # Ensures precision alignment to the clock wall if desired (optional)<br /> AccuracySec=1s<br /> <br /> [Install]<br /> WantedBy=timers.target<br /> <br /> Reload systemd, <br /> systemctl daemon-reload<br /> systemctl enable --now temp-logger.timer<br /> <br /> === SSH ===<br /> <br /> Copy key (and generate ~/.ssh) from client tp pi:<br /> ssh-copy-id username@raspi.example.com<br /> <br /> === Stress ===<br /> <br /> apt install stress-ng<br /> <br /> Run memory test:<br /> stress-ng --vm 1 --vm-bytes 750M --timeout 120s --vm-keep --vm-method rand-sum<br /> <br /> === Swap ===<br /> free -m<br /> swapon --show<br /> <br /> To see current zram configuration:<br /> zramctl <br /> zramctl --output-all /dev/zram0<br /> <br /> Configure hybrid configuration, overruding default /etc/rpi/swap.conf in /etc/rpi/swap.conf.d/hybrid-swap.conf:<br /> [Main]<br /> Mechanism=zram+file<br /> <br /> [Zram]<br /> FixedSizeMiB=512<br /> <br /> [File]<br /> FixedSizeMiB=1024<br /> <br /> Ensure systemd component is enabled and reboot:<br /> systemctl enable var-swap.swap<br /> <br /> There is no need to recreate/resize the /var/swap physical file, which is done at boot time if necessary. In this mode, file system swap will not be visible with swapon; instead it is owned by the zram kernel driver. Zram blocks are pushed to/from file as needed.<br /> <br /> === Temperature ===<br /> <br /> echo &quot;scale=2; $(cat /sys/class/thermal/thermal_zone0/temp) / 1000&quot; | bc<br /> <br /> CPU Core throttling above 80 C.</div>

NickPGSmith https://www.smithnet.org.uk/wiki/index.php?title=Rasberry_Pi&diff=1753 2026-06-02T07:29:44Z

<p>NickPGSmith: /* I2C Development */</p> <hr /> <div>== Device ==<br /> <br /> * [https://www.raspberrypi.com/documentation/computers/raspberry-pi.html#raspberry-pi-3-model-b Rasberry Pi 3B] (&quot;Rev 1.2&quot;)<br /> <br /> cat /proc/device-tree/model<br /> <br /> Hardware info:<br /> * AV Connector:<br /> ** 1 (tip): L Audio<br /> ** 2: R Audio<br /> ** 3: Ground<br /> ** Sleeve: Composite Video.<br /> * [https://www.raspberrypi.com/documentation/computers/raspberry-pi.html Boards]<br /> * [https://www.raspberrypi.com/documentation/computers/raspberry-pi.html#gpio GPIO Header]<br /> ** 3.3V only<br /> ** Pin numbers differ from chip/programmatic pin numbers<br /> <br /> == Rasbery Pi OS ==<br /> <br /> See [https://www.raspberrypi.com/documentation/computers/config_txt.html /boot/firmware/config.txt].<br /> <br /> Command line configuration program:<br /> raspi-config<br /> <br /> eg to enable I2C interface.<br /> <br /> Upgrade:<br /> apt update<br /> apt list --upgradeable<br /> apt upgrade -y<br /> <br /> === Apache Web Server ===<br /> <br /> apt install apache2 -y<br /> <br /> * Configuration: /etc/apache2<br /> * Serve from: /var/www/html<br /> <br /> === Composite Video ===<br /> <br /> In /boot/firmware/config.txt:<br /> enable_tvout=1<br /> dtoverlay=vc4-kms-v3d,composite<br /> <br /> Ensure hdmi_force_hotplug=1 is commented out or set to 0.<br /> <br /> In /boot/firmware/cmdline.txt, either:<br /> vc4.tv_norm=PAL<br /> vc4.tv_norm=NTSC<br /> <br /> To control overscan, see settings:<br /> margin_left<br /> margin_right<br /> <br /> === Go Development ===<br /> <br /> Because of limited RAM, best to cross compile on a more powerful system:<br /> CGO_ENABLED=0 GOOS=linux GOARCH=arm GOARM=7 go build myprog.go<br /> <br /> Or install ARMv6 release:<br /> wget https://go.dev/dl/go1.26.3.linux-armv6l.tar.gz<br /> tar -C /usr/local -xzf go1.26.3.linux-armv6l.tar.gz<br /> <br /> Set environment variables:<br /> PATH=$PATH:/usr/local/go/bin<br /> GOPATH=$HOME/go<br /> <br /> === GPIO Development ===<br /> <br /> Raspberry Pi OS use the newer gpiod subsystem (which interacts with /dev/gpiochip0).<br /> <br /> In C++:<br /> apt install libgpiod-dev gpiod -y<br /> g++ -O3 prog.cpp -o prog -lgpiodcxx<br /> <br /> See [https://libgpiod.readthedocs.io/en/master/ documentation].<br /> <br /> In Python, use:<br /> apt install python3-dev -y<br /> <br /> for python gpiod bindings. See [https://pypi.org/project/gpiod/ documentation]. <br /> <br /> Or the abstraction:<br /> apt install python3-gpiozero -y<br /> <br /> In Go, use: periph.io<br /> <br /> === I2C Development ===<br /> <br /> Check devices:<br /> i2cdetect -y 1<br /> <br /> In C++:<br /> apt install libi2c-dev<br /> g++ i2c_prog.cpp -o i2c_prog -li2c<br /> <br /> === Mail ===<br /> <br /> MUA:<br /> apt install bsd-mailx<br /> apt install mutt<br /> <br /> Mount mail directory from server:<br /> mailhost:/var/spool/mail /var/mail nfs rw,nofail,noatime,_netdev,soft,intr 0 0<br /> <br /> Or use automounter (see other section). Note: UID/GID must match.<br /> <br /> Exim is the default MTA:<br /> dpkg-reconfigure exim4-config<br /> update-exim4.conf<br /> systemctl restart exim4<br /> <br /> Monitor logs:<br /> tail -f /var/log/exim4/mainlog<br /> <br /> === NFS Automounter ===<br /> <br /> apt install autofs nfs-common -y<br /> <br /> To allow remove mounts to be accessed under /net/&lt;server&gt;/&lt;export&gt;, edit /etc/auto.master and enable the host map:<br /> /net -hosts --timeout=60<br /> <br /> systemctl enable autofs<br /> systemctl restart autofs<br /> <br /> To mount remote mail directory:<br /> <br /> Create the new /etc/auto.master.d/mail.autofs file:<br /> /- /etc/auto.direct --timeout=60<br /> <br /> Create the /etc/auto.direct file:<br /> /var/mail -fstype=nfs,rw,soft,intr,tcp,rsize=8192,wsize=8192 mailhost:/var/spool/mail<br /> <br /> systemctl restart autofs<br /> <br /> === NTP Client ===<br /> <br /> apt install systemd-timesyncd -y<br /> <br /> Edit /etc/systemd/timesyncd.conf and set NTP parameter<br /> systemctl restart systemd-timesyncd<br /> timedatectl status<br /> timedatectl timesync-status<br /> <br /> === Service ===<br /> <br /> Create a service file /etc/systemd/system/temp-logger.service:<br /> [Unit]<br /> Description=CPU Temperature Logger to HTML<br /> After=network.target<br /> <br /> [Service]<br /> Type=oneshot<br /> ExecStart=/usr/local/bin/temp_logger.sh<br /> # Run as root or www-data depending on who owns your /var/www/html directory<br /> User=root<br /> <br /> Create a systemd timer /etc/systemd/system/temp-logger.timer:<br /> [Unit]<br /> Description=Run Pi Temperature Logger every 5 minutes<br /> <br /> [Timer]<br /> # Run 5 minutes after boot-up<br /> OnBootSec=5min<br /> # Run every 5 minutes relative to when the timer was started<br /> OnUnitActiveSec=5min<br /> # Ensures precision alignment to the clock wall if desired (optional)<br /> AccuracySec=1s<br /> <br /> [Install]<br /> WantedBy=timers.target<br /> <br /> Reload systemd, <br /> systemctl daemon-reload<br /> systemctl enable --now temp-logger.timer<br /> <br /> === SSH ===<br /> <br /> Copy key (and generate ~/.ssh) from client tp pi:<br /> ssh-copy-id username@raspi.example.com<br /> <br /> === Stress ===<br /> <br /> apt install stress-ng<br /> <br /> Run memory test:<br /> stress-ng --vm 1 --vm-bytes 750M --timeout 120s --vm-keep --vm-method rand-sum<br /> <br /> === Swap ===<br /> free -m<br /> swapon --show<br /> <br /> To see current zram configuration:<br /> zramctl <br /> zramctl --output-all /dev/zram0<br /> <br /> Configure hybrid configuration, overruding default /etc/rpi/swap.conf in /etc/rpi/swap.conf.d/hybrid-swap.conf:<br /> [Main]<br /> Mechanism=zram+file<br /> <br /> [Zram]<br /> FixedSizeMiB=512<br /> <br /> [File]<br /> FixedSizeMiB=1024<br /> <br /> Ensure systemd component is enabled and reboot:<br /> systemctl enable var-swap.swap<br /> <br /> There is no need to recreate/resize the /var/swap physical file, which is done at boot time if necessary. In this mode, file system swap will not be visible with swapon; instead it is owned by the zram kernel driver. Zram blocks are pushed to/from file as needed.<br /> <br /> === Temperature ===<br /> <br /> echo &quot;scale=2; $(cat /sys/class/thermal/thermal_zone0/temp) / 1000&quot; | bc<br /> <br /> CPU Core throttling above 80 C.</div>

NickPGSmith https://www.smithnet.org.uk/wiki/index.php?title=Rasberry_Pi&diff=1752 2026-06-01T21:22:05Z

<p>NickPGSmith: /* I2C Development */</p> <hr /> <div>== Device ==<br /> <br /> * [https://www.raspberrypi.com/documentation/computers/raspberry-pi.html#raspberry-pi-3-model-b Rasberry Pi 3B] (&quot;Rev 1.2&quot;)<br /> <br /> cat /proc/device-tree/model<br /> <br /> Hardware info:<br /> * AV Connector:<br /> ** 1 (tip): L Audio<br /> ** 2: R Audio<br /> ** 3: Ground<br /> ** Sleeve: Composite Video.<br /> * [https://www.raspberrypi.com/documentation/computers/raspberry-pi.html Boards]<br /> * [https://www.raspberrypi.com/documentation/computers/raspberry-pi.html#gpio GPIO Header]<br /> ** 3.3V only<br /> ** Pin numbers differ from chip/programmatic pin numbers<br /> <br /> == Rasbery Pi OS ==<br /> <br /> See [https://www.raspberrypi.com/documentation/computers/config_txt.html /boot/firmware/config.txt].<br /> <br /> Command line configuration program:<br /> raspi-config<br /> <br /> eg to enable I2C interface.<br /> <br /> Upgrade:<br /> apt update<br /> apt list --upgradeable<br /> apt upgrade -y<br /> <br /> === Apache Web Server ===<br /> <br /> apt install apache2 -y<br /> <br /> * Configuration: /etc/apache2<br /> * Serve from: /var/www/html<br /> <br /> === Composite Video ===<br /> <br /> In /boot/firmware/config.txt:<br /> enable_tvout=1<br /> dtoverlay=vc4-kms-v3d,composite<br /> <br /> Ensure hdmi_force_hotplug=1 is commented out or set to 0.<br /> <br /> In /boot/firmware/cmdline.txt, either:<br /> vc4.tv_norm=PAL<br /> vc4.tv_norm=NTSC<br /> <br /> To control overscan, see settings:<br /> margin_left<br /> margin_right<br /> <br /> === Go Development ===<br /> <br /> Because of limited RAM, best to cross compile on a more powerful system:<br /> CGO_ENABLED=0 GOOS=linux GOARCH=arm GOARM=7 go build myprog.go<br /> <br /> Or install ARMv6 release:<br /> wget https://go.dev/dl/go1.26.3.linux-armv6l.tar.gz<br /> tar -C /usr/local -xzf go1.26.3.linux-armv6l.tar.gz<br /> <br /> Set environment variables:<br /> PATH=$PATH:/usr/local/go/bin<br /> GOPATH=$HOME/go<br /> <br /> === GPIO Development ===<br /> <br /> Raspberry Pi OS use the newer gpiod subsystem (which interacts with /dev/gpiochip0).<br /> <br /> In C++:<br /> apt install libgpiod-dev gpiod -y<br /> g++ -O3 prog.cpp -o prog -lgpiodcxx<br /> <br /> See [https://libgpiod.readthedocs.io/en/master/ documentation].<br /> <br /> In Python, use:<br /> apt install python3-dev -y<br /> <br /> for python gpiod bindings. See [https://pypi.org/project/gpiod/ documentation]. <br /> <br /> Or the abstraction:<br /> apt install python3-gpiozero -y<br /> <br /> In Go, use: periph.io<br /> <br /> === I2C Development ===<br /> <br /> In C++:<br /> apt install libi2c-dev<br /> g++ i2c_prog.cpp -o i2c_prog -li2c<br /> <br /> === Mail ===<br /> <br /> MUA:<br /> apt install bsd-mailx<br /> apt install mutt<br /> <br /> Mount mail directory from server:<br /> mailhost:/var/spool/mail /var/mail nfs rw,nofail,noatime,_netdev,soft,intr 0 0<br /> <br /> Or use automounter (see other section). Note: UID/GID must match.<br /> <br /> Exim is the default MTA:<br /> dpkg-reconfigure exim4-config<br /> update-exim4.conf<br /> systemctl restart exim4<br /> <br /> Monitor logs:<br /> tail -f /var/log/exim4/mainlog<br /> <br /> === NFS Automounter ===<br /> <br /> apt install autofs nfs-common -y<br /> <br /> To allow remove mounts to be accessed under /net/&lt;server&gt;/&lt;export&gt;, edit /etc/auto.master and enable the host map:<br /> /net -hosts --timeout=60<br /> <br /> systemctl enable autofs<br /> systemctl restart autofs<br /> <br /> To mount remote mail directory:<br /> <br /> Create the new /etc/auto.master.d/mail.autofs file:<br /> /- /etc/auto.direct --timeout=60<br /> <br /> Create the /etc/auto.direct file:<br /> /var/mail -fstype=nfs,rw,soft,intr,tcp,rsize=8192,wsize=8192 mailhost:/var/spool/mail<br /> <br /> systemctl restart autofs<br /> <br /> === NTP Client ===<br /> <br /> apt install systemd-timesyncd -y<br /> <br /> Edit /etc/systemd/timesyncd.conf and set NTP parameter<br /> systemctl restart systemd-timesyncd<br /> timedatectl status<br /> timedatectl timesync-status<br /> <br /> === Service ===<br /> <br /> Create a service file /etc/systemd/system/temp-logger.service:<br /> [Unit]<br /> Description=CPU Temperature Logger to HTML<br /> After=network.target<br /> <br /> [Service]<br /> Type=oneshot<br /> ExecStart=/usr/local/bin/temp_logger.sh<br /> # Run as root or www-data depending on who owns your /var/www/html directory<br /> User=root<br /> <br /> Create a systemd timer /etc/systemd/system/temp-logger.timer:<br /> [Unit]<br /> Description=Run Pi Temperature Logger every 5 minutes<br /> <br /> [Timer]<br /> # Run 5 minutes after boot-up<br /> OnBootSec=5min<br /> # Run every 5 minutes relative to when the timer was started<br /> OnUnitActiveSec=5min<br /> # Ensures precision alignment to the clock wall if desired (optional)<br /> AccuracySec=1s<br /> <br /> [Install]<br /> WantedBy=timers.target<br /> <br /> Reload systemd, <br /> systemctl daemon-reload<br /> systemctl enable --now temp-logger.timer<br /> <br /> === SSH ===<br /> <br /> Copy key (and generate ~/.ssh) from client tp pi:<br /> ssh-copy-id username@raspi.example.com<br /> <br /> === Stress ===<br /> <br /> apt install stress-ng<br /> <br /> Run memory test:<br /> stress-ng --vm 1 --vm-bytes 750M --timeout 120s --vm-keep --vm-method rand-sum<br /> <br /> === Swap ===<br /> free -m<br /> swapon --show<br /> <br /> To see current zram configuration:<br /> zramctl <br /> zramctl --output-all /dev/zram0<br /> <br /> Configure hybrid configuration, overruding default /etc/rpi/swap.conf in /etc/rpi/swap.conf.d/hybrid-swap.conf:<br /> [Main]<br /> Mechanism=zram+file<br /> <br /> [Zram]<br /> FixedSizeMiB=512<br /> <br /> [File]<br /> FixedSizeMiB=1024<br /> <br /> Ensure systemd component is enabled and reboot:<br /> systemctl enable var-swap.swap<br /> <br /> There is no need to recreate/resize the /var/swap physical file, which is done at boot time if necessary. In this mode, file system swap will not be visible with swapon; instead it is owned by the zram kernel driver. Zram blocks are pushed to/from file as needed.<br /> <br /> === Temperature ===<br /> <br /> echo &quot;scale=2; $(cat /sys/class/thermal/thermal_zone0/temp) / 1000&quot; | bc<br /> <br /> CPU Core throttling above 80 C.</div>

NickPGSmith https://www.smithnet.org.uk/wiki/index.php?title=Rasberry_Pi&diff=1751 2026-06-01T21:21:13Z

<p>NickPGSmith: /* GPIO Development */</p> <hr /> <div>== Device ==<br /> <br /> * [https://www.raspberrypi.com/documentation/computers/raspberry-pi.html#raspberry-pi-3-model-b Rasberry Pi 3B] (&quot;Rev 1.2&quot;)<br /> <br /> cat /proc/device-tree/model<br /> <br /> Hardware info:<br /> * AV Connector:<br /> ** 1 (tip): L Audio<br /> ** 2: R Audio<br /> ** 3: Ground<br /> ** Sleeve: Composite Video.<br /> * [https://www.raspberrypi.com/documentation/computers/raspberry-pi.html Boards]<br /> * [https://www.raspberrypi.com/documentation/computers/raspberry-pi.html#gpio GPIO Header]<br /> ** 3.3V only<br /> ** Pin numbers differ from chip/programmatic pin numbers<br /> <br /> == Rasbery Pi OS ==<br /> <br /> See [https://www.raspberrypi.com/documentation/computers/config_txt.html /boot/firmware/config.txt].<br /> <br /> Command line configuration program:<br /> raspi-config<br /> <br /> eg to enable I2C interface.<br /> <br /> Upgrade:<br /> apt update<br /> apt list --upgradeable<br /> apt upgrade -y<br /> <br /> === Apache Web Server ===<br /> <br /> apt install apache2 -y<br /> <br /> * Configuration: /etc/apache2<br /> * Serve from: /var/www/html<br /> <br /> === Composite Video ===<br /> <br /> In /boot/firmware/config.txt:<br /> enable_tvout=1<br /> dtoverlay=vc4-kms-v3d,composite<br /> <br /> Ensure hdmi_force_hotplug=1 is commented out or set to 0.<br /> <br /> In /boot/firmware/cmdline.txt, either:<br /> vc4.tv_norm=PAL<br /> vc4.tv_norm=NTSC<br /> <br /> To control overscan, see settings:<br /> margin_left<br /> margin_right<br /> <br /> === Go Development ===<br /> <br /> Because of limited RAM, best to cross compile on a more powerful system:<br /> CGO_ENABLED=0 GOOS=linux GOARCH=arm GOARM=7 go build myprog.go<br /> <br /> Or install ARMv6 release:<br /> wget https://go.dev/dl/go1.26.3.linux-armv6l.tar.gz<br /> tar -C /usr/local -xzf go1.26.3.linux-armv6l.tar.gz<br /> <br /> Set environment variables:<br /> PATH=$PATH:/usr/local/go/bin<br /> GOPATH=$HOME/go<br /> <br /> === GPIO Development ===<br /> <br /> Raspberry Pi OS use the newer gpiod subsystem (which interacts with /dev/gpiochip0).<br /> <br /> In C++:<br /> apt install libgpiod-dev gpiod -y<br /> g++ -O3 prog.cpp -o prog -lgpiodcxx<br /> <br /> See [https://libgpiod.readthedocs.io/en/master/ documentation].<br /> <br /> In Python, use:<br /> apt install python3-dev -y<br /> <br /> for python gpiod bindings. See [https://pypi.org/project/gpiod/ documentation]. <br /> <br /> Or the abstraction:<br /> apt install python3-gpiozero -y<br /> <br /> In Go, use: periph.io<br /> <br /> === I2C Development ===<br /> <br /> In C++:<br /> apt install libi2c-dev<br /> <br /> === Mail ===<br /> <br /> MUA:<br /> apt install bsd-mailx<br /> apt install mutt<br /> <br /> Mount mail directory from server:<br /> mailhost:/var/spool/mail /var/mail nfs rw,nofail,noatime,_netdev,soft,intr 0 0<br /> <br /> Or use automounter (see other section). Note: UID/GID must match.<br /> <br /> Exim is the default MTA:<br /> dpkg-reconfigure exim4-config<br /> update-exim4.conf<br /> systemctl restart exim4<br /> <br /> Monitor logs:<br /> tail -f /var/log/exim4/mainlog<br /> <br /> === NFS Automounter ===<br /> <br /> apt install autofs nfs-common -y<br /> <br /> To allow remove mounts to be accessed under /net/&lt;server&gt;/&lt;export&gt;, edit /etc/auto.master and enable the host map:<br /> /net -hosts --timeout=60<br /> <br /> systemctl enable autofs<br /> systemctl restart autofs<br /> <br /> To mount remote mail directory:<br /> <br /> Create the new /etc/auto.master.d/mail.autofs file:<br /> /- /etc/auto.direct --timeout=60<br /> <br /> Create the /etc/auto.direct file:<br /> /var/mail -fstype=nfs,rw,soft,intr,tcp,rsize=8192,wsize=8192 mailhost:/var/spool/mail<br /> <br /> systemctl restart autofs<br /> <br /> === NTP Client ===<br /> <br /> apt install systemd-timesyncd -y<br /> <br /> Edit /etc/systemd/timesyncd.conf and set NTP parameter<br /> systemctl restart systemd-timesyncd<br /> timedatectl status<br /> timedatectl timesync-status<br /> <br /> === Service ===<br /> <br /> Create a service file /etc/systemd/system/temp-logger.service:<br /> [Unit]<br /> Description=CPU Temperature Logger to HTML<br /> After=network.target<br /> <br /> [Service]<br /> Type=oneshot<br /> ExecStart=/usr/local/bin/temp_logger.sh<br /> # Run as root or www-data depending on who owns your /var/www/html directory<br /> User=root<br /> <br /> Create a systemd timer /etc/systemd/system/temp-logger.timer:<br /> [Unit]<br /> Description=Run Pi Temperature Logger every 5 minutes<br /> <br /> [Timer]<br /> # Run 5 minutes after boot-up<br /> OnBootSec=5min<br /> # Run every 5 minutes relative to when the timer was started<br /> OnUnitActiveSec=5min<br /> # Ensures precision alignment to the clock wall if desired (optional)<br /> AccuracySec=1s<br /> <br /> [Install]<br /> WantedBy=timers.target<br /> <br /> Reload systemd, <br /> systemctl daemon-reload<br /> systemctl enable --now temp-logger.timer<br /> <br /> === SSH ===<br /> <br /> Copy key (and generate ~/.ssh) from client tp pi:<br /> ssh-copy-id username@raspi.example.com<br /> <br /> === Stress ===<br /> <br /> apt install stress-ng<br /> <br /> Run memory test:<br /> stress-ng --vm 1 --vm-bytes 750M --timeout 120s --vm-keep --vm-method rand-sum<br /> <br /> === Swap ===<br /> free -m<br /> swapon --show<br /> <br /> To see current zram configuration:<br /> zramctl <br /> zramctl --output-all /dev/zram0<br /> <br /> Configure hybrid configuration, overruding default /etc/rpi/swap.conf in /etc/rpi/swap.conf.d/hybrid-swap.conf:<br /> [Main]<br /> Mechanism=zram+file<br /> <br /> [Zram]<br /> FixedSizeMiB=512<br /> <br /> [File]<br /> FixedSizeMiB=1024<br /> <br /> Ensure systemd component is enabled and reboot:<br /> systemctl enable var-swap.swap<br /> <br /> There is no need to recreate/resize the /var/swap physical file, which is done at boot time if necessary. In this mode, file system swap will not be visible with swapon; instead it is owned by the zram kernel driver. Zram blocks are pushed to/from file as needed.<br /> <br /> === Temperature ===<br /> <br /> echo &quot;scale=2; $(cat /sys/class/thermal/thermal_zone0/temp) / 1000&quot; | bc<br /> <br /> CPU Core throttling above 80 C.</div>

NickPGSmith https://www.smithnet.org.uk/wiki/index.php?title=Rasberry_Pi&diff=1750 2026-06-01T21:00:18Z

<p>NickPGSmith: </p> <hr /> <div>== Device ==<br /> <br /> * [https://www.raspberrypi.com/documentation/computers/raspberry-pi.html#raspberry-pi-3-model-b Rasberry Pi 3B] (&quot;Rev 1.2&quot;)<br /> <br /> cat /proc/device-tree/model<br /> <br /> Hardware info:<br /> * AV Connector:<br /> ** 1 (tip): L Audio<br /> ** 2: R Audio<br /> ** 3: Ground<br /> ** Sleeve: Composite Video.<br /> * [https://www.raspberrypi.com/documentation/computers/raspberry-pi.html Boards]<br /> * [https://www.raspberrypi.com/documentation/computers/raspberry-pi.html#gpio GPIO Header]<br /> ** 3.3V only<br /> ** Pin numbers differ from chip/programmatic pin numbers<br /> <br /> == Rasbery Pi OS ==<br /> <br /> See [https://www.raspberrypi.com/documentation/computers/config_txt.html /boot/firmware/config.txt].<br /> <br /> Command line configuration program:<br /> raspi-config<br /> <br /> eg to enable I2C interface.<br /> <br /> Upgrade:<br /> apt update<br /> apt list --upgradeable<br /> apt upgrade -y<br /> <br /> === Apache Web Server ===<br /> <br /> apt install apache2 -y<br /> <br /> * Configuration: /etc/apache2<br /> * Serve from: /var/www/html<br /> <br /> === Composite Video ===<br /> <br /> In /boot/firmware/config.txt:<br /> enable_tvout=1<br /> dtoverlay=vc4-kms-v3d,composite<br /> <br /> Ensure hdmi_force_hotplug=1 is commented out or set to 0.<br /> <br /> In /boot/firmware/cmdline.txt, either:<br /> vc4.tv_norm=PAL<br /> vc4.tv_norm=NTSC<br /> <br /> To control overscan, see settings:<br /> margin_left<br /> margin_right<br /> <br /> === Go Development ===<br /> <br /> Because of limited RAM, best to cross compile on a more powerful system:<br /> CGO_ENABLED=0 GOOS=linux GOARCH=arm GOARM=7 go build myprog.go<br /> <br /> Or install ARMv6 release:<br /> wget https://go.dev/dl/go1.26.3.linux-armv6l.tar.gz<br /> tar -C /usr/local -xzf go1.26.3.linux-armv6l.tar.gz<br /> <br /> Set environment variables:<br /> PATH=$PATH:/usr/local/go/bin<br /> GOPATH=$HOME/go<br /> <br /> === GPIO Development ===<br /> <br /> Raspberry Pi OS use the newer gpiod subsystem (which interacts with /dev/gpiochip0).<br /> <br /> In C++:<br /> apt install libgpiod-dev gpiod -y<br /> g++ -O3 prog.cpp -o prog -lgpiodcxx<br /> <br /> See [https://libgpiod.readthedocs.io/en/master/ documentation].<br /> <br /> In Python, use:<br /> apt install python3-dev -y<br /> <br /> for python gpiod bindings. See [https://pypi.org/project/gpiod/ documentation]. <br /> <br /> Or the abstraction:<br /> apt install python3-gpiozero -y<br /> <br /> In Go, use: periph.io<br /> <br /> === Mail ===<br /> <br /> MUA:<br /> apt install bsd-mailx<br /> apt install mutt<br /> <br /> Mount mail directory from server:<br /> mailhost:/var/spool/mail /var/mail nfs rw,nofail,noatime,_netdev,soft,intr 0 0<br /> <br /> Or use automounter (see other section). Note: UID/GID must match.<br /> <br /> Exim is the default MTA:<br /> dpkg-reconfigure exim4-config<br /> update-exim4.conf<br /> systemctl restart exim4<br /> <br /> Monitor logs:<br /> tail -f /var/log/exim4/mainlog<br /> <br /> === NFS Automounter ===<br /> <br /> apt install autofs nfs-common -y<br /> <br /> To allow remove mounts to be accessed under /net/&lt;server&gt;/&lt;export&gt;, edit /etc/auto.master and enable the host map:<br /> /net -hosts --timeout=60<br /> <br /> systemctl enable autofs<br /> systemctl restart autofs<br /> <br /> To mount remote mail directory:<br /> <br /> Create the new /etc/auto.master.d/mail.autofs file:<br /> /- /etc/auto.direct --timeout=60<br /> <br /> Create the /etc/auto.direct file:<br /> /var/mail -fstype=nfs,rw,soft,intr,tcp,rsize=8192,wsize=8192 mailhost:/var/spool/mail<br /> <br /> systemctl restart autofs<br /> <br /> === NTP Client ===<br /> <br /> apt install systemd-timesyncd -y<br /> <br /> Edit /etc/systemd/timesyncd.conf and set NTP parameter<br /> systemctl restart systemd-timesyncd<br /> timedatectl status<br /> timedatectl timesync-status<br /> <br /> === Service ===<br /> <br /> Create a service file /etc/systemd/system/temp-logger.service:<br /> [Unit]<br /> Description=CPU Temperature Logger to HTML<br /> After=network.target<br /> <br /> [Service]<br /> Type=oneshot<br /> ExecStart=/usr/local/bin/temp_logger.sh<br /> # Run as root or www-data depending on who owns your /var/www/html directory<br /> User=root<br /> <br /> Create a systemd timer /etc/systemd/system/temp-logger.timer:<br /> [Unit]<br /> Description=Run Pi Temperature Logger every 5 minutes<br /> <br /> [Timer]<br /> # Run 5 minutes after boot-up<br /> OnBootSec=5min<br /> # Run every 5 minutes relative to when the timer was started<br /> OnUnitActiveSec=5min<br /> # Ensures precision alignment to the clock wall if desired (optional)<br /> AccuracySec=1s<br /> <br /> [Install]<br /> WantedBy=timers.target<br /> <br /> Reload systemd, <br /> systemctl daemon-reload<br /> systemctl enable --now temp-logger.timer<br /> <br /> === SSH ===<br /> <br /> Copy key (and generate ~/.ssh) from client tp pi:<br /> ssh-copy-id username@raspi.example.com<br /> <br /> === Stress ===<br /> <br /> apt install stress-ng<br /> <br /> Run memory test:<br /> stress-ng --vm 1 --vm-bytes 750M --timeout 120s --vm-keep --vm-method rand-sum<br /> <br /> === Swap ===<br /> free -m<br /> swapon --show<br /> <br /> To see current zram configuration:<br /> zramctl <br /> zramctl --output-all /dev/zram0<br /> <br /> Configure hybrid configuration, overruding default /etc/rpi/swap.conf in /etc/rpi/swap.conf.d/hybrid-swap.conf:<br /> [Main]<br /> Mechanism=zram+file<br /> <br /> [Zram]<br /> FixedSizeMiB=512<br /> <br /> [File]<br /> FixedSizeMiB=1024<br /> <br /> Ensure systemd component is enabled and reboot:<br /> systemctl enable var-swap.swap<br /> <br /> There is no need to recreate/resize the /var/swap physical file, which is done at boot time if necessary. In this mode, file system swap will not be visible with swapon; instead it is owned by the zram kernel driver. Zram blocks are pushed to/from file as needed.<br /> <br /> === Temperature ===<br /> <br /> echo &quot;scale=2; $(cat /sys/class/thermal/thermal_zone0/temp) / 1000&quot; | bc<br /> <br /> CPU Core throttling above 80 C.</div>

NickPGSmith https://www.smithnet.org.uk/wiki/index.php?title=Rasberry_Pi&diff=1749 2026-06-01T17:34:51Z

<p>NickPGSmith: /* Service */</p> <hr /> <div>== Device ==<br /> <br /> * [https://www.raspberrypi.com/documentation/computers/raspberry-pi.html#raspberry-pi-3-model-b Rasberry Pi 3B] (&quot;Rev 1.2&quot;)<br /> <br /> cat /proc/device-tree/model<br /> <br /> Hardware info:<br /> * AV Connector:<br /> ** 1 (tip): L Audio<br /> ** 2: R Audio<br /> ** 3: Ground<br /> ** Sleeve: Composite Video.<br /> * [https://www.raspberrypi.com/documentation/computers/raspberry-pi.html Boards]<br /> * [https://www.raspberrypi.com/documentation/computers/raspberry-pi.html#gpio GPIO Header]<br /> ** 3.3V only<br /> ** Pin numbers differ from chip/programmatic pin numbers<br /> <br /> == Rasbery Pi OS ==<br /> <br /> See [https://www.raspberrypi.com/documentation/computers/config_txt.html /boot/firmware/config.txt].<br /> <br /> Command line configuration program:<br /> raspi-config<br /> <br /> Upgrade:<br /> apt update<br /> apt list --upgradeable<br /> apt upgrade -y<br /> <br /> === Apache Web Server ===<br /> <br /> apt install apache2 -y<br /> <br /> * Configuration: /etc/apache2<br /> * Serve from: /var/www/html<br /> <br /> === Composite Video ===<br /> <br /> In /boot/firmware/config.txt:<br /> enable_tvout=1<br /> dtoverlay=vc4-kms-v3d,composite<br /> <br /> Ensure hdmi_force_hotplug=1 is commented out or set to 0.<br /> <br /> In /boot/firmware/cmdline.txt, either:<br /> vc4.tv_norm=PAL<br /> vc4.tv_norm=NTSC<br /> <br /> To control overscan, see settings:<br /> margin_left<br /> margin_right<br /> <br /> === Go Development ===<br /> <br /> Because of limited RAM, best to cross compile on a more powerful system:<br /> CGO_ENABLED=0 GOOS=linux GOARCH=arm GOARM=7 go build myprog.go<br /> <br /> Or install ARMv6 release:<br /> wget https://go.dev/dl/go1.26.3.linux-armv6l.tar.gz<br /> tar -C /usr/local -xzf go1.26.3.linux-armv6l.tar.gz<br /> <br /> Set environment variables:<br /> PATH=$PATH:/usr/local/go/bin<br /> GOPATH=$HOME/go<br /> <br /> === GPIO Development ===<br /> <br /> Raspberry Pi OS use the newer gpiod subsystem (which interacts with /dev/gpiochip0).<br /> <br /> In C++:<br /> apt install libgpiod-dev gpiod -y<br /> g++ -O3 prog.cpp -o prog -lgpiodcxx<br /> <br /> See [https://libgpiod.readthedocs.io/en/master/ documentation].<br /> <br /> In Python, use:<br /> apt install python3-dev -y<br /> <br /> for python gpiod bindings. See [https://pypi.org/project/gpiod/ documentation]. <br /> <br /> Or the abstraction:<br /> apt install python3-gpiozero -y<br /> <br /> In Go, use: periph.io<br /> <br /> === Mail ===<br /> <br /> MUA:<br /> apt install bsd-mailx<br /> apt install mutt<br /> <br /> Mount mail directory from server:<br /> mailhost:/var/spool/mail /var/mail nfs rw,nofail,noatime,_netdev,soft,intr 0 0<br /> <br /> Or use automounter (see other section). Note: UID/GID must match.<br /> <br /> Exim is the default MTA:<br /> dpkg-reconfigure exim4-config<br /> update-exim4.conf<br /> systemctl restart exim4<br /> <br /> Monitor logs:<br /> tail -f /var/log/exim4/mainlog<br /> <br /> === NFS Automounter ===<br /> <br /> apt install autofs nfs-common -y<br /> <br /> To allow remove mounts to be accessed under /net/&lt;server&gt;/&lt;export&gt;, edit /etc/auto.master and enable the host map:<br /> /net -hosts --timeout=60<br /> <br /> systemctl enable autofs<br /> systemctl restart autofs<br /> <br /> To mount remote mail directory:<br /> <br /> Create the new /etc/auto.master.d/mail.autofs file:<br /> /- /etc/auto.direct --timeout=60<br /> <br /> Create the /etc/auto.direct file:<br /> /var/mail -fstype=nfs,rw,soft,intr,tcp,rsize=8192,wsize=8192 mailhost:/var/spool/mail<br /> <br /> systemctl restart autofs<br /> <br /> === NTP Client ===<br /> <br /> apt install systemd-timesyncd -y<br /> <br /> Edit /etc/systemd/timesyncd.conf and set NTP parameter<br /> systemctl restart systemd-timesyncd<br /> timedatectl status<br /> timedatectl timesync-status<br /> <br /> === Service ===<br /> <br /> Create a service file /etc/systemd/system/temp-logger.service:<br /> [Unit]<br /> Description=CPU Temperature Logger to HTML<br /> After=network.target<br /> <br /> [Service]<br /> Type=oneshot<br /> ExecStart=/usr/local/bin/temp_logger.sh<br /> # Run as root or www-data depending on who owns your /var/www/html directory<br /> User=root<br /> <br /> Create a systemd timer /etc/systemd/system/temp-logger.timer:<br /> [Unit]<br /> Description=Run Pi Temperature Logger every 5 minutes<br /> <br /> [Timer]<br /> # Run 5 minutes after boot-up<br /> OnBootSec=5min<br /> # Run every 5 minutes relative to when the timer was started<br /> OnUnitActiveSec=5min<br /> # Ensures precision alignment to the clock wall if desired (optional)<br /> AccuracySec=1s<br /> <br /> [Install]<br /> WantedBy=timers.target<br /> <br /> Reload systemd, <br /> systemctl daemon-reload<br /> systemctl enable --now temp-logger.timer<br /> <br /> === SSH ===<br /> <br /> Copy key (and generate ~/.ssh) from client tp pi:<br /> ssh-copy-id username@raspi.example.com<br /> <br /> === Stress ===<br /> <br /> apt install stress-ng<br /> <br /> Run memory test:<br /> stress-ng --vm 1 --vm-bytes 750M --timeout 120s --vm-keep --vm-method rand-sum<br /> <br /> === Swap ===<br /> free -m<br /> swapon --show<br /> <br /> To see current zram configuration:<br /> zramctl <br /> zramctl --output-all /dev/zram0<br /> <br /> Configure hybrid configuration, overruding default /etc/rpi/swap.conf in /etc/rpi/swap.conf.d/hybrid-swap.conf:<br /> [Main]<br /> Mechanism=zram+file<br /> <br /> [Zram]<br /> FixedSizeMiB=512<br /> <br /> [File]<br /> FixedSizeMiB=1024<br /> <br /> Ensure systemd component is enabled and reboot:<br /> systemctl enable var-swap.swap<br /> <br /> There is no need to recreate/resize the /var/swap physical file, which is done at boot time if necessary. In this mode, file system swap will not be visible with swapon; instead it is owned by the zram kernel driver. Zram blocks are pushed to/from file as needed.<br /> <br /> === Temperature ===<br /> <br /> echo &quot;scale=2; $(cat /sys/class/thermal/thermal_zone0/temp) / 1000&quot; | bc<br /> <br /> CPU Core throttling above 80 C.</div>

NickPGSmith https://www.smithnet.org.uk/wiki/index.php?title=Rasberry_Pi&diff=1748 2026-05-31T16:48:08Z

<p>NickPGSmith: /* SSH */</p> <hr /> <div>== Device ==<br /> <br /> * [https://www.raspberrypi.com/documentation/computers/raspberry-pi.html#raspberry-pi-3-model-b Rasberry Pi 3B] (&quot;Rev 1.2&quot;)<br /> <br /> cat /proc/device-tree/model<br /> <br /> Hardware info:<br /> * AV Connector:<br /> ** 1 (tip): L Audio<br /> ** 2: R Audio<br /> ** 3: Ground<br /> ** Sleeve: Composite Video.<br /> * [https://www.raspberrypi.com/documentation/computers/raspberry-pi.html Boards]<br /> * [https://www.raspberrypi.com/documentation/computers/raspberry-pi.html#gpio GPIO Header]<br /> ** 3.3V only<br /> ** Pin numbers differ from chip/programmatic pin numbers<br /> <br /> == Rasbery Pi OS ==<br /> <br /> See [https://www.raspberrypi.com/documentation/computers/config_txt.html /boot/firmware/config.txt].<br /> <br /> Command line configuration program:<br /> raspi-config<br /> <br /> Upgrade:<br /> apt update<br /> apt list --upgradeable<br /> apt upgrade -y<br /> <br /> === Apache Web Server ===<br /> <br /> apt install apache2 -y<br /> <br /> * Configuration: /etc/apache2<br /> * Serve from: /var/www/html<br /> <br /> === Composite Video ===<br /> <br /> In /boot/firmware/config.txt:<br /> enable_tvout=1<br /> dtoverlay=vc4-kms-v3d,composite<br /> <br /> Ensure hdmi_force_hotplug=1 is commented out or set to 0.<br /> <br /> In /boot/firmware/cmdline.txt, either:<br /> vc4.tv_norm=PAL<br /> vc4.tv_norm=NTSC<br /> <br /> To control overscan, see settings:<br /> margin_left<br /> margin_right<br /> <br /> === Go Development ===<br /> <br /> Because of limited RAM, best to cross compile on a more powerful system:<br /> CGO_ENABLED=0 GOOS=linux GOARCH=arm GOARM=7 go build myprog.go<br /> <br /> Or install ARMv6 release:<br /> wget https://go.dev/dl/go1.26.3.linux-armv6l.tar.gz<br /> tar -C /usr/local -xzf go1.26.3.linux-armv6l.tar.gz<br /> <br /> Set environment variables:<br /> PATH=$PATH:/usr/local/go/bin<br /> GOPATH=$HOME/go<br /> <br /> === GPIO Development ===<br /> <br /> Raspberry Pi OS use the newer gpiod subsystem (which interacts with /dev/gpiochip0).<br /> <br /> In C++:<br /> apt install libgpiod-dev gpiod -y<br /> g++ -O3 prog.cpp -o prog -lgpiodcxx<br /> <br /> See [https://libgpiod.readthedocs.io/en/master/ documentation].<br /> <br /> In Python, use:<br /> apt install python3-dev -y<br /> <br /> for python gpiod bindings. See [https://pypi.org/project/gpiod/ documentation]. <br /> <br /> Or the abstraction:<br /> apt install python3-gpiozero -y<br /> <br /> In Go, use: periph.io<br /> <br /> === Mail ===<br /> <br /> MUA:<br /> apt install bsd-mailx<br /> apt install mutt<br /> <br /> Mount mail directory from server:<br /> mailhost:/var/spool/mail /var/mail nfs rw,nofail,noatime,_netdev,soft,intr 0 0<br /> <br /> Or use automounter (see other section). Note: UID/GID must match.<br /> <br /> Exim is the default MTA:<br /> dpkg-reconfigure exim4-config<br /> update-exim4.conf<br /> systemctl restart exim4<br /> <br /> Monitor logs:<br /> tail -f /var/log/exim4/mainlog<br /> <br /> === NFS Automounter ===<br /> <br /> apt install autofs nfs-common -y<br /> <br /> To allow remove mounts to be accessed under /net/&lt;server&gt;/&lt;export&gt;, edit /etc/auto.master and enable the host map:<br /> /net -hosts --timeout=60<br /> <br /> systemctl enable autofs<br /> systemctl restart autofs<br /> <br /> To mount remote mail directory:<br /> <br /> Create the new /etc/auto.master.d/mail.autofs file:<br /> /- /etc/auto.direct --timeout=60<br /> <br /> Create the /etc/auto.direct file:<br /> /var/mail -fstype=nfs,rw,soft,intr,tcp,rsize=8192,wsize=8192 mailhost:/var/spool/mail<br /> <br /> systemctl restart autofs<br /> <br /> === NTP Client ===<br /> <br /> apt install systemd-timesyncd -y<br /> <br /> Edit /etc/systemd/timesyncd.conf and set NTP parameter<br /> systemctl restart systemd-timesyncd<br /> timedatectl status<br /> timedatectl timesync-status<br /> <br /> === Service ===<br /> <br /> Create a service file nano /etc/systemd/system/temp-logger.service:<br /> [Unit]<br /> Description=CPU Temperature Logger to HTML<br /> After=network.target<br /> <br /> [Service]<br /> Type=oneshot<br /> ExecStart=/usr/local/bin/temp_logger.sh<br /> # Run as root or www-data depending on who owns your /var/www/html directory<br /> User=root<br /> <br /> Create a systemd timer /etc/systemd/system/temp-logger.timer:<br /> [Unit]<br /> Description=Run Pi Temperature Logger every 5 minutes<br /> <br /> [Timer]<br /> # Run 5 minutes after boot-up<br /> OnBootSec=5min<br /> # Run every 5 minutes relative to when the timer was started<br /> OnUnitActiveSec=5min<br /> # Ensures precision alignment to the clock wall if desired (optional)<br /> AccuracySec=1s<br /> <br /> [Install]<br /> WantedBy=timers.target<br /> <br /> Reload systemd, <br /> systemctl daemon-reload<br /> systemctl enable --now temp-logger.timer<br /> <br /> === SSH ===<br /> <br /> Copy key (and generate ~/.ssh) from client tp pi:<br /> ssh-copy-id username@raspi.example.com<br /> <br /> === Stress ===<br /> <br /> apt install stress-ng<br /> <br /> Run memory test:<br /> stress-ng --vm 1 --vm-bytes 750M --timeout 120s --vm-keep --vm-method rand-sum<br /> <br /> === Swap ===<br /> free -m<br /> swapon --show<br /> <br /> To see current zram configuration:<br /> zramctl <br /> zramctl --output-all /dev/zram0<br /> <br /> Configure hybrid configuration, overruding default /etc/rpi/swap.conf in /etc/rpi/swap.conf.d/hybrid-swap.conf:<br /> [Main]<br /> Mechanism=zram+file<br /> <br /> [Zram]<br /> FixedSizeMiB=512<br /> <br /> [File]<br /> FixedSizeMiB=1024<br /> <br /> Ensure systemd component is enabled and reboot:<br /> systemctl enable var-swap.swap<br /> <br /> There is no need to recreate/resize the /var/swap physical file, which is done at boot time if necessary. In this mode, file system swap will not be visible with swapon; instead it is owned by the zram kernel driver. Zram blocks are pushed to/from file as needed.<br /> <br /> === Temperature ===<br /> <br /> echo &quot;scale=2; $(cat /sys/class/thermal/thermal_zone0/temp) / 1000&quot; | bc<br /> <br /> CPU Core throttling above 80 C.</div>

NickPGSmith https://www.smithnet.org.uk/wiki/index.php?title=Rasberry_Pi&diff=1747 2026-05-31T16:39:12Z

<p>NickPGSmith: /* Swap */</p> <hr /> <div>== Device ==<br /> <br /> * [https://www.raspberrypi.com/documentation/computers/raspberry-pi.html#raspberry-pi-3-model-b Rasberry Pi 3B] (&quot;Rev 1.2&quot;)<br /> <br /> cat /proc/device-tree/model<br /> <br /> Hardware info:<br /> * AV Connector:<br /> ** 1 (tip): L Audio<br /> ** 2: R Audio<br /> ** 3: Ground<br /> ** Sleeve: Composite Video.<br /> * [https://www.raspberrypi.com/documentation/computers/raspberry-pi.html Boards]<br /> * [https://www.raspberrypi.com/documentation/computers/raspberry-pi.html#gpio GPIO Header]<br /> ** 3.3V only<br /> ** Pin numbers differ from chip/programmatic pin numbers<br /> <br /> == Rasbery Pi OS ==<br /> <br /> See [https://www.raspberrypi.com/documentation/computers/config_txt.html /boot/firmware/config.txt].<br /> <br /> Command line configuration program:<br /> raspi-config<br /> <br /> Upgrade:<br /> apt update<br /> apt list --upgradeable<br /> apt upgrade -y<br /> <br /> === Apache Web Server ===<br /> <br /> apt install apache2 -y<br /> <br /> * Configuration: /etc/apache2<br /> * Serve from: /var/www/html<br /> <br /> === Composite Video ===<br /> <br /> In /boot/firmware/config.txt:<br /> enable_tvout=1<br /> dtoverlay=vc4-kms-v3d,composite<br /> <br /> Ensure hdmi_force_hotplug=1 is commented out or set to 0.<br /> <br /> In /boot/firmware/cmdline.txt, either:<br /> vc4.tv_norm=PAL<br /> vc4.tv_norm=NTSC<br /> <br /> To control overscan, see settings:<br /> margin_left<br /> margin_right<br /> <br /> === Go Development ===<br /> <br /> Because of limited RAM, best to cross compile on a more powerful system:<br /> CGO_ENABLED=0 GOOS=linux GOARCH=arm GOARM=7 go build myprog.go<br /> <br /> Or install ARMv6 release:<br /> wget https://go.dev/dl/go1.26.3.linux-armv6l.tar.gz<br /> tar -C /usr/local -xzf go1.26.3.linux-armv6l.tar.gz<br /> <br /> Set environment variables:<br /> PATH=$PATH:/usr/local/go/bin<br /> GOPATH=$HOME/go<br /> <br /> === GPIO Development ===<br /> <br /> Raspberry Pi OS use the newer gpiod subsystem (which interacts with /dev/gpiochip0).<br /> <br /> In C++:<br /> apt install libgpiod-dev gpiod -y<br /> g++ -O3 prog.cpp -o prog -lgpiodcxx<br /> <br /> See [https://libgpiod.readthedocs.io/en/master/ documentation].<br /> <br /> In Python, use:<br /> apt install python3-dev -y<br /> <br /> for python gpiod bindings. See [https://pypi.org/project/gpiod/ documentation]. <br /> <br /> Or the abstraction:<br /> apt install python3-gpiozero -y<br /> <br /> In Go, use: periph.io<br /> <br /> === Mail ===<br /> <br /> MUA:<br /> apt install bsd-mailx<br /> apt install mutt<br /> <br /> Mount mail directory from server:<br /> mailhost:/var/spool/mail /var/mail nfs rw,nofail,noatime,_netdev,soft,intr 0 0<br /> <br /> Or use automounter (see other section). Note: UID/GID must match.<br /> <br /> Exim is the default MTA:<br /> dpkg-reconfigure exim4-config<br /> update-exim4.conf<br /> systemctl restart exim4<br /> <br /> Monitor logs:<br /> tail -f /var/log/exim4/mainlog<br /> <br /> === NFS Automounter ===<br /> <br /> apt install autofs nfs-common -y<br /> <br /> To allow remove mounts to be accessed under /net/&lt;server&gt;/&lt;export&gt;, edit /etc/auto.master and enable the host map:<br /> /net -hosts --timeout=60<br /> <br /> systemctl enable autofs<br /> systemctl restart autofs<br /> <br /> To mount remote mail directory:<br /> <br /> Create the new /etc/auto.master.d/mail.autofs file:<br /> /- /etc/auto.direct --timeout=60<br /> <br /> Create the /etc/auto.direct file:<br /> /var/mail -fstype=nfs,rw,soft,intr,tcp,rsize=8192,wsize=8192 mailhost:/var/spool/mail<br /> <br /> systemctl restart autofs<br /> <br /> === NTP Client ===<br /> <br /> apt install systemd-timesyncd -y<br /> <br /> Edit /etc/systemd/timesyncd.conf and set NTP parameter<br /> systemctl restart systemd-timesyncd<br /> timedatectl status<br /> timedatectl timesync-status<br /> <br /> === Service ===<br /> <br /> Create a service file nano /etc/systemd/system/temp-logger.service:<br /> [Unit]<br /> Description=CPU Temperature Logger to HTML<br /> After=network.target<br /> <br /> [Service]<br /> Type=oneshot<br /> ExecStart=/usr/local/bin/temp_logger.sh<br /> # Run as root or www-data depending on who owns your /var/www/html directory<br /> User=root<br /> <br /> Create a systemd timer /etc/systemd/system/temp-logger.timer:<br /> [Unit]<br /> Description=Run Pi Temperature Logger every 5 minutes<br /> <br /> [Timer]<br /> # Run 5 minutes after boot-up<br /> OnBootSec=5min<br /> # Run every 5 minutes relative to when the timer was started<br /> OnUnitActiveSec=5min<br /> # Ensures precision alignment to the clock wall if desired (optional)<br /> AccuracySec=1s<br /> <br /> [Install]<br /> WantedBy=timers.target<br /> <br /> Reload systemd, <br /> systemctl daemon-reload<br /> systemctl enable --now temp-logger.timer<br /> <br /> === SSH ===<br /> <br /> Copy key (and generate ~/.ssh) from client tp pi:<br /> ssh-copy-id username@raspi.example.com<br /> <br /> === Swap ===<br /> free -m<br /> swapon --show<br /> <br /> To see current zram configuration:<br /> zramctl <br /> zramctl --output-all /dev/zram0<br /> <br /> Configure hybrid configuration, overruding default /etc/rpi/swap.conf in /etc/rpi/swap.conf.d/hybrid-swap.conf:<br /> [Main]<br /> Mechanism=zram+file<br /> <br /> [Zram]<br /> FixedSizeMiB=512<br /> <br /> [File]<br /> FixedSizeMiB=1024<br /> <br /> Ensure systemd component is enabled and reboot:<br /> systemctl enable var-swap.swap<br /> <br /> There is no need to recreate/resize the /var/swap physical file, which is done at boot time if necessary. In this mode, file system swap will not be visible with swapon; instead it is owned by the zram kernel driver. Zram blocks are pushed to/from file as needed.<br /> <br /> === Temperature ===<br /> <br /> echo &quot;scale=2; $(cat /sys/class/thermal/thermal_zone0/temp) / 1000&quot; | bc<br /> <br /> CPU Core throttling above 80 C.</div>

NickPGSmith https://www.smithnet.org.uk/wiki/index.php?title=Rasberry_Pi&diff=1746 2026-05-31T15:39:10Z

<p>NickPGSmith: /* Device */</p> <hr /> <div>== Device ==<br /> <br /> * [https://www.raspberrypi.com/documentation/computers/raspberry-pi.html#raspberry-pi-3-model-b Rasberry Pi 3B] (&quot;Rev 1.2&quot;)<br /> <br /> cat /proc/device-tree/model<br /> <br /> Hardware info:<br /> * AV Connector:<br /> ** 1 (tip): L Audio<br /> ** 2: R Audio<br /> ** 3: Ground<br /> ** Sleeve: Composite Video.<br /> * [https://www.raspberrypi.com/documentation/computers/raspberry-pi.html Boards]<br /> * [https://www.raspberrypi.com/documentation/computers/raspberry-pi.html#gpio GPIO Header]<br /> ** 3.3V only<br /> ** Pin numbers differ from chip/programmatic pin numbers<br /> <br /> == Rasbery Pi OS ==<br /> <br /> See [https://www.raspberrypi.com/documentation/computers/config_txt.html /boot/firmware/config.txt].<br /> <br /> Command line configuration program:<br /> raspi-config<br /> <br /> Upgrade:<br /> apt update<br /> apt list --upgradeable<br /> apt upgrade -y<br /> <br /> === Apache Web Server ===<br /> <br /> apt install apache2 -y<br /> <br /> * Configuration: /etc/apache2<br /> * Serve from: /var/www/html<br /> <br /> === Composite Video ===<br /> <br /> In /boot/firmware/config.txt:<br /> enable_tvout=1<br /> dtoverlay=vc4-kms-v3d,composite<br /> <br /> Ensure hdmi_force_hotplug=1 is commented out or set to 0.<br /> <br /> In /boot/firmware/cmdline.txt, either:<br /> vc4.tv_norm=PAL<br /> vc4.tv_norm=NTSC<br /> <br /> To control overscan, see settings:<br /> margin_left<br /> margin_right<br /> <br /> === Go Development ===<br /> <br /> Because of limited RAM, best to cross compile on a more powerful system:<br /> CGO_ENABLED=0 GOOS=linux GOARCH=arm GOARM=7 go build myprog.go<br /> <br /> Or install ARMv6 release:<br /> wget https://go.dev/dl/go1.26.3.linux-armv6l.tar.gz<br /> tar -C /usr/local -xzf go1.26.3.linux-armv6l.tar.gz<br /> <br /> Set environment variables:<br /> PATH=$PATH:/usr/local/go/bin<br /> GOPATH=$HOME/go<br /> <br /> === GPIO Development ===<br /> <br /> Raspberry Pi OS use the newer gpiod subsystem (which interacts with /dev/gpiochip0).<br /> <br /> In C++:<br /> apt install libgpiod-dev gpiod -y<br /> g++ -O3 prog.cpp -o prog -lgpiodcxx<br /> <br /> See [https://libgpiod.readthedocs.io/en/master/ documentation].<br /> <br /> In Python, use:<br /> apt install python3-dev -y<br /> <br /> for python gpiod bindings. See [https://pypi.org/project/gpiod/ documentation]. <br /> <br /> Or the abstraction:<br /> apt install python3-gpiozero -y<br /> <br /> In Go, use: periph.io<br /> <br /> === Mail ===<br /> <br /> MUA:<br /> apt install bsd-mailx<br /> apt install mutt<br /> <br /> Mount mail directory from server:<br /> mailhost:/var/spool/mail /var/mail nfs rw,nofail,noatime,_netdev,soft,intr 0 0<br /> <br /> Or use automounter (see other section). Note: UID/GID must match.<br /> <br /> Exim is the default MTA:<br /> dpkg-reconfigure exim4-config<br /> update-exim4.conf<br /> systemctl restart exim4<br /> <br /> Monitor logs:<br /> tail -f /var/log/exim4/mainlog<br /> <br /> === NFS Automounter ===<br /> <br /> apt install autofs nfs-common -y<br /> <br /> To allow remove mounts to be accessed under /net/&lt;server&gt;/&lt;export&gt;, edit /etc/auto.master and enable the host map:<br /> /net -hosts --timeout=60<br /> <br /> systemctl enable autofs<br /> systemctl restart autofs<br /> <br /> To mount remote mail directory:<br /> <br /> Create the new /etc/auto.master.d/mail.autofs file:<br /> /- /etc/auto.direct --timeout=60<br /> <br /> Create the /etc/auto.direct file:<br /> /var/mail -fstype=nfs,rw,soft,intr,tcp,rsize=8192,wsize=8192 mailhost:/var/spool/mail<br /> <br /> systemctl restart autofs<br /> <br /> === NTP Client ===<br /> <br /> apt install systemd-timesyncd -y<br /> <br /> Edit /etc/systemd/timesyncd.conf and set NTP parameter<br /> systemctl restart systemd-timesyncd<br /> timedatectl status<br /> timedatectl timesync-status<br /> <br /> === Service ===<br /> <br /> Create a service file nano /etc/systemd/system/temp-logger.service:<br /> [Unit]<br /> Description=CPU Temperature Logger to HTML<br /> After=network.target<br /> <br /> [Service]<br /> Type=oneshot<br /> ExecStart=/usr/local/bin/temp_logger.sh<br /> # Run as root or www-data depending on who owns your /var/www/html directory<br /> User=root<br /> <br /> Create a systemd timer /etc/systemd/system/temp-logger.timer:<br /> [Unit]<br /> Description=Run Pi Temperature Logger every 5 minutes<br /> <br /> [Timer]<br /> # Run 5 minutes after boot-up<br /> OnBootSec=5min<br /> # Run every 5 minutes relative to when the timer was started<br /> OnUnitActiveSec=5min<br /> # Ensures precision alignment to the clock wall if desired (optional)<br /> AccuracySec=1s<br /> <br /> [Install]<br /> WantedBy=timers.target<br /> <br /> Reload systemd, <br /> systemctl daemon-reload<br /> systemctl enable --now temp-logger.timer<br /> <br /> === SSH ===<br /> <br /> Copy key (and generate ~/.ssh) from client tp pi:<br /> ssh-copy-id username@raspi.example.com<br /> <br /> === Swap ===<br /> free -m<br /> swapon --show<br /> <br /> To see current zram configuration:<br /> zramctl <br /> zramctl --output-all /dev/zram0<br /> <br /> Configure in /etc/rpi/swap.conf<br /> [Zram]<br /> FixedSizeMiB=512<br /> <br /> Add filesystem swap:<br /> swapoff -a<br /> dd if=/dev/zero of=/var/swap bs=1M count=1024<br /> chmod 600 /var/swap<br /> mkswap /var/swap<br /> swapon /var/swap<br /> <br /> Add to /etc/fstab:<br /> /var/swap none swap sw 0 0<br /> <br /> === Temperature ===<br /> <br /> echo &quot;scale=2; $(cat /sys/class/thermal/thermal_zone0/temp) / 1000&quot; | bc<br /> <br /> CPU Core throttling above 80 C.</div>

NickPGSmith https://www.smithnet.org.uk/wiki/index.php?title=Rasberry_Pi&diff=1745 2026-05-30T20:32:40Z

<p>NickPGSmith: /* Service */</p> <hr /> <div>== Device ==<br /> <br /> * [https://www.raspberrypi.com/documentation/computers/raspberry-pi.html#raspberry-pi-3-model-b Rasberry Pi 3B] (&quot;Rev 1.2&quot;)<br /> <br /> cat /proc/device-tree/model<br /> <br /> Hardware info:<br /> * AV Connector:<br /> ** 1 (tip): L Audio<br /> ** 2: R Audio<br /> ** 3: Ground<br /> ** Sleeve: Composite Video.<br /> * [https://www.raspberrypi.com/documentation/computers/raspberry-pi.html Boards]<br /> * [https://www.raspberrypi.com/documentation/computers/raspberry-pi.html#gpio GPIO Header]<br /> <br /> == Rasbery Pi OS ==<br /> <br /> See [https://www.raspberrypi.com/documentation/computers/config_txt.html /boot/firmware/config.txt].<br /> <br /> Command line configuration program:<br /> raspi-config<br /> <br /> Upgrade:<br /> apt update<br /> apt list --upgradeable<br /> apt upgrade -y<br /> <br /> === Apache Web Server ===<br /> <br /> apt install apache2 -y<br /> <br /> * Configuration: /etc/apache2<br /> * Serve from: /var/www/html<br /> <br /> === Composite Video ===<br /> <br /> In /boot/firmware/config.txt:<br /> enable_tvout=1<br /> dtoverlay=vc4-kms-v3d,composite<br /> <br /> Ensure hdmi_force_hotplug=1 is commented out or set to 0.<br /> <br /> In /boot/firmware/cmdline.txt, either:<br /> vc4.tv_norm=PAL<br /> vc4.tv_norm=NTSC<br /> <br /> To control overscan, see settings:<br /> margin_left<br /> margin_right<br /> <br /> === Go Development ===<br /> <br /> Because of limited RAM, best to cross compile on a more powerful system:<br /> CGO_ENABLED=0 GOOS=linux GOARCH=arm GOARM=7 go build myprog.go<br /> <br /> Or install ARMv6 release:<br /> wget https://go.dev/dl/go1.26.3.linux-armv6l.tar.gz<br /> tar -C /usr/local -xzf go1.26.3.linux-armv6l.tar.gz<br /> <br /> Set environment variables:<br /> PATH=$PATH:/usr/local/go/bin<br /> GOPATH=$HOME/go<br /> <br /> === GPIO Development ===<br /> <br /> Raspberry Pi OS use the newer gpiod subsystem (which interacts with /dev/gpiochip0).<br /> <br /> In C++:<br /> apt install libgpiod-dev gpiod -y<br /> g++ -O3 prog.cpp -o prog -lgpiodcxx<br /> <br /> See [https://libgpiod.readthedocs.io/en/master/ documentation].<br /> <br /> In Python, use:<br /> apt install python3-dev -y<br /> <br /> for python gpiod bindings. See [https://pypi.org/project/gpiod/ documentation]. <br /> <br /> Or the abstraction:<br /> apt install python3-gpiozero -y<br /> <br /> In Go, use: periph.io<br /> <br /> === Mail ===<br /> <br /> MUA:<br /> apt install bsd-mailx<br /> apt install mutt<br /> <br /> Mount mail directory from server:<br /> mailhost:/var/spool/mail /var/mail nfs rw,nofail,noatime,_netdev,soft,intr 0 0<br /> <br /> Or use automounter (see other section). Note: UID/GID must match.<br /> <br /> Exim is the default MTA:<br /> dpkg-reconfigure exim4-config<br /> update-exim4.conf<br /> systemctl restart exim4<br /> <br /> Monitor logs:<br /> tail -f /var/log/exim4/mainlog<br /> <br /> === NFS Automounter ===<br /> <br /> apt install autofs nfs-common -y<br /> <br /> To allow remove mounts to be accessed under /net/&lt;server&gt;/&lt;export&gt;, edit /etc/auto.master and enable the host map:<br /> /net -hosts --timeout=60<br /> <br /> systemctl enable autofs<br /> systemctl restart autofs<br /> <br /> To mount remote mail directory:<br /> <br /> Create the new /etc/auto.master.d/mail.autofs file:<br /> /- /etc/auto.direct --timeout=60<br /> <br /> Create the /etc/auto.direct file:<br /> /var/mail -fstype=nfs,rw,soft,intr,tcp,rsize=8192,wsize=8192 mailhost:/var/spool/mail<br /> <br /> systemctl restart autofs<br /> <br /> === NTP Client ===<br /> <br /> apt install systemd-timesyncd -y<br /> <br /> Edit /etc/systemd/timesyncd.conf and set NTP parameter<br /> systemctl restart systemd-timesyncd<br /> timedatectl status<br /> timedatectl timesync-status<br /> <br /> === Service ===<br /> <br /> Create a service file nano /etc/systemd/system/temp-logger.service:<br /> [Unit]<br /> Description=CPU Temperature Logger to HTML<br /> After=network.target<br /> <br /> [Service]<br /> Type=oneshot<br /> ExecStart=/usr/local/bin/temp_logger.sh<br /> # Run as root or www-data depending on who owns your /var/www/html directory<br /> User=root<br /> <br /> Create a systemd timer /etc/systemd/system/temp-logger.timer:<br /> [Unit]<br /> Description=Run Pi Temperature Logger every 5 minutes<br /> <br /> [Timer]<br /> # Run 5 minutes after boot-up<br /> OnBootSec=5min<br /> # Run every 5 minutes relative to when the timer was started<br /> OnUnitActiveSec=5min<br /> # Ensures precision alignment to the clock wall if desired (optional)<br /> AccuracySec=1s<br /> <br /> [Install]<br /> WantedBy=timers.target<br /> <br /> Reload systemd, <br /> systemctl daemon-reload<br /> systemctl enable --now temp-logger.timer<br /> <br /> === SSH ===<br /> <br /> Copy key (and generate ~/.ssh) from client tp pi:<br /> ssh-copy-id username@raspi.example.com<br /> <br /> === Swap ===<br /> free -m<br /> swapon --show<br /> <br /> To see current zram configuration:<br /> zramctl <br /> zramctl --output-all /dev/zram0<br /> <br /> Configure in /etc/rpi/swap.conf<br /> [Zram]<br /> FixedSizeMiB=512<br /> <br /> Add filesystem swap:<br /> swapoff -a<br /> dd if=/dev/zero of=/var/swap bs=1M count=1024<br /> chmod 600 /var/swap<br /> mkswap /var/swap<br /> swapon /var/swap<br /> <br /> Add to /etc/fstab:<br /> /var/swap none swap sw 0 0<br /> <br /> === Temperature ===<br /> <br /> echo &quot;scale=2; $(cat /sys/class/thermal/thermal_zone0/temp) / 1000&quot; | bc<br /> <br /> CPU Core throttling above 80 C.</div>

NickPGSmith https://www.smithnet.org.uk/wiki/index.php?title=Rasberry_Pi&diff=1744 2026-05-30T20:29:01Z

<p>NickPGSmith: /* NTP Client */</p> <hr /> <div>== Device ==<br /> <br /> * [https://www.raspberrypi.com/documentation/computers/raspberry-pi.html#raspberry-pi-3-model-b Rasberry Pi 3B] (&quot;Rev 1.2&quot;)<br /> <br /> cat /proc/device-tree/model<br /> <br /> Hardware info:<br /> * AV Connector:<br /> ** 1 (tip): L Audio<br /> ** 2: R Audio<br /> ** 3: Ground<br /> ** Sleeve: Composite Video.<br /> * [https://www.raspberrypi.com/documentation/computers/raspberry-pi.html Boards]<br /> * [https://www.raspberrypi.com/documentation/computers/raspberry-pi.html#gpio GPIO Header]<br /> <br /> == Rasbery Pi OS ==<br /> <br /> See [https://www.raspberrypi.com/documentation/computers/config_txt.html /boot/firmware/config.txt].<br /> <br /> Command line configuration program:<br /> raspi-config<br /> <br /> Upgrade:<br /> apt update<br /> apt list --upgradeable<br /> apt upgrade -y<br /> <br /> === Apache Web Server ===<br /> <br /> apt install apache2 -y<br /> <br /> * Configuration: /etc/apache2<br /> * Serve from: /var/www/html<br /> <br /> === Composite Video ===<br /> <br /> In /boot/firmware/config.txt:<br /> enable_tvout=1<br /> dtoverlay=vc4-kms-v3d,composite<br /> <br /> Ensure hdmi_force_hotplug=1 is commented out or set to 0.<br /> <br /> In /boot/firmware/cmdline.txt, either:<br /> vc4.tv_norm=PAL<br /> vc4.tv_norm=NTSC<br /> <br /> To control overscan, see settings:<br /> margin_left<br /> margin_right<br /> <br /> === Go Development ===<br /> <br /> Because of limited RAM, best to cross compile on a more powerful system:<br /> CGO_ENABLED=0 GOOS=linux GOARCH=arm GOARM=7 go build myprog.go<br /> <br /> Or install ARMv6 release:<br /> wget https://go.dev/dl/go1.26.3.linux-armv6l.tar.gz<br /> tar -C /usr/local -xzf go1.26.3.linux-armv6l.tar.gz<br /> <br /> Set environment variables:<br /> PATH=$PATH:/usr/local/go/bin<br /> GOPATH=$HOME/go<br /> <br /> === GPIO Development ===<br /> <br /> Raspberry Pi OS use the newer gpiod subsystem (which interacts with /dev/gpiochip0).<br /> <br /> In C++:<br /> apt install libgpiod-dev gpiod -y<br /> g++ -O3 prog.cpp -o prog -lgpiodcxx<br /> <br /> See [https://libgpiod.readthedocs.io/en/master/ documentation].<br /> <br /> In Python, use:<br /> apt install python3-dev -y<br /> <br /> for python gpiod bindings. See [https://pypi.org/project/gpiod/ documentation]. <br /> <br /> Or the abstraction:<br /> apt install python3-gpiozero -y<br /> <br /> In Go, use: periph.io<br /> <br /> === Mail ===<br /> <br /> MUA:<br /> apt install bsd-mailx<br /> apt install mutt<br /> <br /> Mount mail directory from server:<br /> mailhost:/var/spool/mail /var/mail nfs rw,nofail,noatime,_netdev,soft,intr 0 0<br /> <br /> Or use automounter (see other section). Note: UID/GID must match.<br /> <br /> Exim is the default MTA:<br /> dpkg-reconfigure exim4-config<br /> update-exim4.conf<br /> systemctl restart exim4<br /> <br /> Monitor logs:<br /> tail -f /var/log/exim4/mainlog<br /> <br /> === NFS Automounter ===<br /> <br /> apt install autofs nfs-common -y<br /> <br /> To allow remove mounts to be accessed under /net/&lt;server&gt;/&lt;export&gt;, edit /etc/auto.master and enable the host map:<br /> /net -hosts --timeout=60<br /> <br /> systemctl enable autofs<br /> systemctl restart autofs<br /> <br /> To mount remote mail directory:<br /> <br /> Create the new /etc/auto.master.d/mail.autofs file:<br /> /- /etc/auto.direct --timeout=60<br /> <br /> Create the /etc/auto.direct file:<br /> /var/mail -fstype=nfs,rw,soft,intr,tcp,rsize=8192,wsize=8192 mailhost:/var/spool/mail<br /> <br /> systemctl restart autofs<br /> <br /> === NTP Client ===<br /> <br /> apt install systemd-timesyncd -y<br /> <br /> Edit /etc/systemd/timesyncd.conf and set NTP parameter<br /> systemctl restart systemd-timesyncd<br /> timedatectl status<br /> timedatectl timesync-status<br /> <br /> === Service ===<br /> <br /> Create a service file nano /etc/systemd/system/temp-logger.service:<br /> [Unit]<br /> Description=CPU Temperature Logger to HTML<br /> After=network.target<br /> <br /> [Service]<br /> Type=oneshot<br /> ExecStart=/usr/local/bin/temp_logger.sh<br /> # Run as root or www-data depending on who owns your /var/www/html directory<br /> User=root<br /> <br /> Create a systemd timer /etc/systemd/system/temp-logger.timer:<br /> [Unit]<br /> Description=Run Pi Temperature Logger every 5 minutes<br /> <br /> [Timer]<br /> # Run 5 minutes after boot-up<br /> OnBootSec=5min<br /> # Run every 5 minutes relative to when the timer was started<br /> OnUnitActiveSec=5min<br /> # Ensures precision alignment to the clock wall if desired (optional)<br /> AccuracySec=1s<br /> <br /> [Install]<br /> WantedBy=timers.target<br /> <br /> === SSH ===<br /> <br /> Copy key (and generate ~/.ssh) from client tp pi:<br /> ssh-copy-id username@raspi.example.com<br /> <br /> === Swap ===<br /> free -m<br /> swapon --show<br /> <br /> To see current zram configuration:<br /> zramctl <br /> zramctl --output-all /dev/zram0<br /> <br /> Configure in /etc/rpi/swap.conf<br /> [Zram]<br /> FixedSizeMiB=512<br /> <br /> Add filesystem swap:<br /> swapoff -a<br /> dd if=/dev/zero of=/var/swap bs=1M count=1024<br /> chmod 600 /var/swap<br /> mkswap /var/swap<br /> swapon /var/swap<br /> <br /> Add to /etc/fstab:<br /> /var/swap none swap sw 0 0<br /> <br /> === Temperature ===<br /> <br /> echo &quot;scale=2; $(cat /sys/class/thermal/thermal_zone0/temp) / 1000&quot; | bc<br /> <br /> CPU Core throttling above 80 C.</div>

NickPGSmith https://www.smithnet.org.uk/wiki/index.php?title=Rasberry_Pi&diff=1743 2026-05-30T20:12:32Z

<p>NickPGSmith: /* Swap */</p> <hr /> <div>== Device ==<br /> <br /> * [https://www.raspberrypi.com/documentation/computers/raspberry-pi.html#raspberry-pi-3-model-b Rasberry Pi 3B] (&quot;Rev 1.2&quot;)<br /> <br /> cat /proc/device-tree/model<br /> <br /> Hardware info:<br /> * AV Connector:<br /> ** 1 (tip): L Audio<br /> ** 2: R Audio<br /> ** 3: Ground<br /> ** Sleeve: Composite Video.<br /> * [https://www.raspberrypi.com/documentation/computers/raspberry-pi.html Boards]<br /> * [https://www.raspberrypi.com/documentation/computers/raspberry-pi.html#gpio GPIO Header]<br /> <br /> == Rasbery Pi OS ==<br /> <br /> See [https://www.raspberrypi.com/documentation/computers/config_txt.html /boot/firmware/config.txt].<br /> <br /> Command line configuration program:<br /> raspi-config<br /> <br /> Upgrade:<br /> apt update<br /> apt list --upgradeable<br /> apt upgrade -y<br /> <br /> === Apache Web Server ===<br /> <br /> apt install apache2 -y<br /> <br /> * Configuration: /etc/apache2<br /> * Serve from: /var/www/html<br /> <br /> === Composite Video ===<br /> <br /> In /boot/firmware/config.txt:<br /> enable_tvout=1<br /> dtoverlay=vc4-kms-v3d,composite<br /> <br /> Ensure hdmi_force_hotplug=1 is commented out or set to 0.<br /> <br /> In /boot/firmware/cmdline.txt, either:<br /> vc4.tv_norm=PAL<br /> vc4.tv_norm=NTSC<br /> <br /> To control overscan, see settings:<br /> margin_left<br /> margin_right<br /> <br /> === Go Development ===<br /> <br /> Because of limited RAM, best to cross compile on a more powerful system:<br /> CGO_ENABLED=0 GOOS=linux GOARCH=arm GOARM=7 go build myprog.go<br /> <br /> Or install ARMv6 release:<br /> wget https://go.dev/dl/go1.26.3.linux-armv6l.tar.gz<br /> tar -C /usr/local -xzf go1.26.3.linux-armv6l.tar.gz<br /> <br /> Set environment variables:<br /> PATH=$PATH:/usr/local/go/bin<br /> GOPATH=$HOME/go<br /> <br /> === GPIO Development ===<br /> <br /> Raspberry Pi OS use the newer gpiod subsystem (which interacts with /dev/gpiochip0).<br /> <br /> In C++:<br /> apt install libgpiod-dev gpiod -y<br /> g++ -O3 prog.cpp -o prog -lgpiodcxx<br /> <br /> See [https://libgpiod.readthedocs.io/en/master/ documentation].<br /> <br /> In Python, use:<br /> apt install python3-dev -y<br /> <br /> for python gpiod bindings. See [https://pypi.org/project/gpiod/ documentation]. <br /> <br /> Or the abstraction:<br /> apt install python3-gpiozero -y<br /> <br /> In Go, use: periph.io<br /> <br /> === Mail ===<br /> <br /> MUA:<br /> apt install bsd-mailx<br /> apt install mutt<br /> <br /> Mount mail directory from server:<br /> mailhost:/var/spool/mail /var/mail nfs rw,nofail,noatime,_netdev,soft,intr 0 0<br /> <br /> Or use automounter (see other section). Note: UID/GID must match.<br /> <br /> Exim is the default MTA:<br /> dpkg-reconfigure exim4-config<br /> update-exim4.conf<br /> systemctl restart exim4<br /> <br /> Monitor logs:<br /> tail -f /var/log/exim4/mainlog<br /> <br /> === NFS Automounter ===<br /> <br /> apt install autofs nfs-common -y<br /> <br /> To allow remove mounts to be accessed under /net/&lt;server&gt;/&lt;export&gt;, edit /etc/auto.master and enable the host map:<br /> /net -hosts --timeout=60<br /> <br /> systemctl enable autofs<br /> systemctl restart autofs<br /> <br /> To mount remote mail directory:<br /> <br /> Create the new /etc/auto.master.d/mail.autofs file:<br /> /- /etc/auto.direct --timeout=60<br /> <br /> Create the /etc/auto.direct file:<br /> /var/mail -fstype=nfs,rw,soft,intr,tcp,rsize=8192,wsize=8192 mailhost:/var/spool/mail<br /> <br /> systemctl restart autofs<br /> <br /> === NTP Client ===<br /> <br /> apt install systemd-timesyncd -y<br /> <br /> Edit /etc/systemd/timesyncd.conf and set NTP parameter<br /> systemctl restart systemd-timesyncd<br /> timedatectl status<br /> timedatectl timesync-status<br /> <br /> === SSH ===<br /> <br /> Copy key (and generate ~/.ssh) from client tp pi:<br /> ssh-copy-id username@raspi.example.com<br /> <br /> === Swap ===<br /> free -m<br /> swapon --show<br /> <br /> To see current zram configuration:<br /> zramctl <br /> zramctl --output-all /dev/zram0<br /> <br /> Configure in /etc/rpi/swap.conf<br /> [Zram]<br /> FixedSizeMiB=512<br /> <br /> Add filesystem swap:<br /> swapoff -a<br /> dd if=/dev/zero of=/var/swap bs=1M count=1024<br /> chmod 600 /var/swap<br /> mkswap /var/swap<br /> swapon /var/swap<br /> <br /> Add to /etc/fstab:<br /> /var/swap none swap sw 0 0<br /> <br /> === Temperature ===<br /> <br /> echo &quot;scale=2; $(cat /sys/class/thermal/thermal_zone0/temp) / 1000&quot; | bc<br /> <br /> CPU Core throttling above 80 C.</div>

NickPGSmith https://www.smithnet.org.uk/wiki/index.php?title=Rasberry_Pi&diff=1742 2026-05-30T06:17:15Z

<p>NickPGSmith: /* Rasbery Pi OS */</p> <hr /> <div>== Device ==<br /> <br /> * [https://www.raspberrypi.com/documentation/computers/raspberry-pi.html#raspberry-pi-3-model-b Rasberry Pi 3B] (&quot;Rev 1.2&quot;)<br /> <br /> cat /proc/device-tree/model<br /> <br /> Hardware info:<br /> * AV Connector:<br /> ** 1 (tip): L Audio<br /> ** 2: R Audio<br /> ** 3: Ground<br /> ** Sleeve: Composite Video.<br /> * [https://www.raspberrypi.com/documentation/computers/raspberry-pi.html Boards]<br /> * [https://www.raspberrypi.com/documentation/computers/raspberry-pi.html#gpio GPIO Header]<br /> <br /> == Rasbery Pi OS ==<br /> <br /> See [https://www.raspberrypi.com/documentation/computers/config_txt.html /boot/firmware/config.txt].<br /> <br /> Command line configuration program:<br /> raspi-config<br /> <br /> Upgrade:<br /> apt update<br /> apt list --upgradeable<br /> apt upgrade -y<br /> <br /> === Apache Web Server ===<br /> <br /> apt install apache2 -y<br /> <br /> * Configuration: /etc/apache2<br /> * Serve from: /var/www/html<br /> <br /> === Composite Video ===<br /> <br /> In /boot/firmware/config.txt:<br /> enable_tvout=1<br /> dtoverlay=vc4-kms-v3d,composite<br /> <br /> Ensure hdmi_force_hotplug=1 is commented out or set to 0.<br /> <br /> In /boot/firmware/cmdline.txt, either:<br /> vc4.tv_norm=PAL<br /> vc4.tv_norm=NTSC<br /> <br /> To control overscan, see settings:<br /> margin_left<br /> margin_right<br /> <br /> === Go Development ===<br /> <br /> Because of limited RAM, best to cross compile on a more powerful system:<br /> CGO_ENABLED=0 GOOS=linux GOARCH=arm GOARM=7 go build myprog.go<br /> <br /> Or install ARMv6 release:<br /> wget https://go.dev/dl/go1.26.3.linux-armv6l.tar.gz<br /> tar -C /usr/local -xzf go1.26.3.linux-armv6l.tar.gz<br /> <br /> Set environment variables:<br /> PATH=$PATH:/usr/local/go/bin<br /> GOPATH=$HOME/go<br /> <br /> === GPIO Development ===<br /> <br /> Raspberry Pi OS use the newer gpiod subsystem (which interacts with /dev/gpiochip0).<br /> <br /> In C++:<br /> apt install libgpiod-dev gpiod -y<br /> g++ -O3 prog.cpp -o prog -lgpiodcxx<br /> <br /> See [https://libgpiod.readthedocs.io/en/master/ documentation].<br /> <br /> In Python, use:<br /> apt install python3-dev -y<br /> <br /> for python gpiod bindings. See [https://pypi.org/project/gpiod/ documentation]. <br /> <br /> Or the abstraction:<br /> apt install python3-gpiozero -y<br /> <br /> In Go, use: periph.io<br /> <br /> === Mail ===<br /> <br /> MUA:<br /> apt install bsd-mailx<br /> apt install mutt<br /> <br /> Mount mail directory from server:<br /> mailhost:/var/spool/mail /var/mail nfs rw,nofail,noatime,_netdev,soft,intr 0 0<br /> <br /> Or use automounter (see other section). Note: UID/GID must match.<br /> <br /> Exim is the default MTA:<br /> dpkg-reconfigure exim4-config<br /> update-exim4.conf<br /> systemctl restart exim4<br /> <br /> Monitor logs:<br /> tail -f /var/log/exim4/mainlog<br /> <br /> === NFS Automounter ===<br /> <br /> apt install autofs nfs-common -y<br /> <br /> To allow remove mounts to be accessed under /net/&lt;server&gt;/&lt;export&gt;, edit /etc/auto.master and enable the host map:<br /> /net -hosts --timeout=60<br /> <br /> systemctl enable autofs<br /> systemctl restart autofs<br /> <br /> To mount remote mail directory:<br /> <br /> Create the new /etc/auto.master.d/mail.autofs file:<br /> /- /etc/auto.direct --timeout=60<br /> <br /> Create the /etc/auto.direct file:<br /> /var/mail -fstype=nfs,rw,soft,intr,tcp,rsize=8192,wsize=8192 mailhost:/var/spool/mail<br /> <br /> systemctl restart autofs<br /> <br /> === NTP Client ===<br /> <br /> apt install systemd-timesyncd -y<br /> <br /> Edit /etc/systemd/timesyncd.conf and set NTP parameter<br /> systemctl restart systemd-timesyncd<br /> timedatectl status<br /> timedatectl timesync-status<br /> <br /> === Swap ===<br /> free -m<br /> swapon --show<br /> <br /> To see current zram configuration:<br /> zramctl <br /> zramctl --output-all /dev/zram0<br /> <br /> Configure in /etc/rpi/swap.conf<br /> [Zram]<br /> FixedSizeMiB=512<br /> <br /> Add filesystem swap:<br /> swapoff -a<br /> dd if=/dev/zero of=/var/swap bs=1M count=1024<br /> chmod 600 /var/swap<br /> mkswap /var/swap<br /> swapon /var/swap<br /> <br /> Add to /etc/fstab:<br /> /var/swap none swap sw 0 0<br /> <br /> === Temperature ===<br /> <br /> echo &quot;scale=2; $(cat /sys/class/thermal/thermal_zone0/temp) / 1000&quot; | bc<br /> <br /> CPU Core throttling above 80 C.</div>

NickPGSmith https://www.smithnet.org.uk/wiki/index.php?title=Rasberry_Pi&diff=1741 2026-05-28T20:27:58Z

<p>NickPGSmith: /* Swap */</p> <hr /> <div>== Device ==<br /> <br /> * [https://www.raspberrypi.com/documentation/computers/raspberry-pi.html#raspberry-pi-3-model-b Rasberry Pi 3B] (&quot;Rev 1.2&quot;)<br /> <br /> cat /proc/device-tree/model<br /> <br /> Hardware info:<br /> * AV Connector:<br /> ** 1 (tip): L Audio<br /> ** 2: R Audio<br /> ** 3: Ground<br /> ** Sleeve: Composite Video.<br /> * [https://www.raspberrypi.com/documentation/computers/raspberry-pi.html Boards]<br /> * [https://www.raspberrypi.com/documentation/computers/raspberry-pi.html#gpio GPIO Header]<br /> <br /> == Rasbery Pi OS ==<br /> <br /> See [https://www.raspberrypi.com/documentation/computers/config_txt.html /boot/firmware/config.txt].<br /> <br /> Command line configuration program:<br /> raspi-config<br /> <br /> Upgrade:<br /> apt update &amp;&amp; sudo apt upgrade -y<br /> <br /> === Apache Web Server ===<br /> <br /> apt install apache2 -y<br /> <br /> * Configuration: /etc/apache2<br /> * Serve from: /var/www/html<br /> <br /> === Composite Video ===<br /> <br /> In /boot/firmware/config.txt:<br /> enable_tvout=1<br /> dtoverlay=vc4-kms-v3d,composite<br /> <br /> Ensure hdmi_force_hotplug=1 is commented out or set to 0.<br /> <br /> In /boot/firmware/cmdline.txt, either:<br /> vc4.tv_norm=PAL<br /> vc4.tv_norm=NTSC<br /> <br /> To control overscan, see settings:<br /> margin_left<br /> margin_right<br /> <br /> === Go Development ===<br /> <br /> Because of limited RAM, best to cross compile on a more powerful system:<br /> CGO_ENABLED=0 GOOS=linux GOARCH=arm GOARM=7 go build myprog.go<br /> <br /> Or install ARMv6 release:<br /> wget https://go.dev/dl/go1.26.3.linux-armv6l.tar.gz<br /> tar -C /usr/local -xzf go1.26.3.linux-armv6l.tar.gz<br /> <br /> Set environment variables:<br /> PATH=$PATH:/usr/local/go/bin<br /> GOPATH=$HOME/go<br /> <br /> === GPIO Development ===<br /> <br /> Raspberry Pi OS use the newer gpiod subsystem (which interacts with /dev/gpiochip0).<br /> <br /> In C++:<br /> apt install libgpiod-dev gpiod -y<br /> g++ -O3 prog.cpp -o prog -lgpiodcxx<br /> <br /> See [https://libgpiod.readthedocs.io/en/master/ documentation].<br /> <br /> In Python, use:<br /> apt install python3-dev -y<br /> <br /> for python gpiod bindings. See [https://pypi.org/project/gpiod/ documentation]. <br /> <br /> Or the abstraction:<br /> apt install python3-gpiozero -y<br /> <br /> In Go, use: periph.io<br /> <br /> === Mail ===<br /> <br /> MUA:<br /> apt install bsd-mailx<br /> apt install mutt<br /> <br /> Mount mail directory from server:<br /> mailhost:/var/spool/mail /var/mail nfs rw,nofail,noatime,_netdev,soft,intr 0 0<br /> <br /> Or use automounter (see other section). Note: UID/GID must match.<br /> <br /> Exim is the default MTA:<br /> dpkg-reconfigure exim4-config<br /> update-exim4.conf<br /> systemctl restart exim4<br /> <br /> Monitor logs:<br /> tail -f /var/log/exim4/mainlog<br /> <br /> === NFS Automounter ===<br /> <br /> apt install autofs nfs-common -y<br /> <br /> To allow remove mounts to be accessed under /net/&lt;server&gt;/&lt;export&gt;, edit /etc/auto.master and enable the host map:<br /> /net -hosts --timeout=60<br /> <br /> systemctl enable autofs<br /> systemctl restart autofs<br /> <br /> To mount remote mail directory:<br /> <br /> Create the new /etc/auto.master.d/mail.autofs file:<br /> /- /etc/auto.direct --timeout=60<br /> <br /> Create the /etc/auto.direct file:<br /> /var/mail -fstype=nfs,rw,soft,intr,tcp,rsize=8192,wsize=8192 mailhost:/var/spool/mail<br /> <br /> systemctl restart autofs<br /> <br /> === NTP Client ===<br /> <br /> apt install systemd-timesyncd -y<br /> <br /> Edit /etc/systemd/timesyncd.conf and set NTP parameter<br /> systemctl restart systemd-timesyncd<br /> timedatectl status<br /> timedatectl timesync-status<br /> <br /> === Swap ===<br /> free -m<br /> swapon --show<br /> <br /> To see current zram configuration:<br /> zramctl <br /> zramctl --output-all /dev/zram0<br /> <br /> Configure in /etc/rpi/swap.conf<br /> [Zram]<br /> FixedSizeMiB=512<br /> <br /> Add filesystem swap:<br /> swapoff -a<br /> dd if=/dev/zero of=/var/swap bs=1M count=1024<br /> chmod 600 /var/swap<br /> mkswap /var/swap<br /> swapon /var/swap<br /> <br /> Add to /etc/fstab:<br /> /var/swap none swap sw 0 0<br /> <br /> === Temperature ===<br /> <br /> echo &quot;scale=2; $(cat /sys/class/thermal/thermal_zone0/temp) / 1000&quot; | bc<br /> <br /> CPU Core throttling above 80 C.</div>

NickPGSmith https://www.smithnet.org.uk/wiki/index.php?title=Rasberry_Pi&diff=1740 2026-05-28T20:13:37Z

<p>NickPGSmith: /* Swap */</p> <hr /> <div>== Device ==<br /> <br /> * [https://www.raspberrypi.com/documentation/computers/raspberry-pi.html#raspberry-pi-3-model-b Rasberry Pi 3B] (&quot;Rev 1.2&quot;)<br /> <br /> cat /proc/device-tree/model<br /> <br /> Hardware info:<br /> * AV Connector:<br /> ** 1 (tip): L Audio<br /> ** 2: R Audio<br /> ** 3: Ground<br /> ** Sleeve: Composite Video.<br /> * [https://www.raspberrypi.com/documentation/computers/raspberry-pi.html Boards]<br /> * [https://www.raspberrypi.com/documentation/computers/raspberry-pi.html#gpio GPIO Header]<br /> <br /> == Rasbery Pi OS ==<br /> <br /> See [https://www.raspberrypi.com/documentation/computers/config_txt.html /boot/firmware/config.txt].<br /> <br /> Command line configuration program:<br /> raspi-config<br /> <br /> Upgrade:<br /> apt update &amp;&amp; sudo apt upgrade -y<br /> <br /> === Apache Web Server ===<br /> <br /> apt install apache2 -y<br /> <br /> * Configuration: /etc/apache2<br /> * Serve from: /var/www/html<br /> <br /> === Composite Video ===<br /> <br /> In /boot/firmware/config.txt:<br /> enable_tvout=1<br /> dtoverlay=vc4-kms-v3d,composite<br /> <br /> Ensure hdmi_force_hotplug=1 is commented out or set to 0.<br /> <br /> In /boot/firmware/cmdline.txt, either:<br /> vc4.tv_norm=PAL<br /> vc4.tv_norm=NTSC<br /> <br /> To control overscan, see settings:<br /> margin_left<br /> margin_right<br /> <br /> === Go Development ===<br /> <br /> Because of limited RAM, best to cross compile on a more powerful system:<br /> CGO_ENABLED=0 GOOS=linux GOARCH=arm GOARM=7 go build myprog.go<br /> <br /> Or install ARMv6 release:<br /> wget https://go.dev/dl/go1.26.3.linux-armv6l.tar.gz<br /> tar -C /usr/local -xzf go1.26.3.linux-armv6l.tar.gz<br /> <br /> Set environment variables:<br /> PATH=$PATH:/usr/local/go/bin<br /> GOPATH=$HOME/go<br /> <br /> === GPIO Development ===<br /> <br /> Raspberry Pi OS use the newer gpiod subsystem (which interacts with /dev/gpiochip0).<br /> <br /> In C++:<br /> apt install libgpiod-dev gpiod -y<br /> g++ -O3 prog.cpp -o prog -lgpiodcxx<br /> <br /> See [https://libgpiod.readthedocs.io/en/master/ documentation].<br /> <br /> In Python, use:<br /> apt install python3-dev -y<br /> <br /> for python gpiod bindings. See [https://pypi.org/project/gpiod/ documentation]. <br /> <br /> Or the abstraction:<br /> apt install python3-gpiozero -y<br /> <br /> In Go, use: periph.io<br /> <br /> === Mail ===<br /> <br /> MUA:<br /> apt install bsd-mailx<br /> apt install mutt<br /> <br /> Mount mail directory from server:<br /> mailhost:/var/spool/mail /var/mail nfs rw,nofail,noatime,_netdev,soft,intr 0 0<br /> <br /> Or use automounter (see other section). Note: UID/GID must match.<br /> <br /> Exim is the default MTA:<br /> dpkg-reconfigure exim4-config<br /> update-exim4.conf<br /> systemctl restart exim4<br /> <br /> Monitor logs:<br /> tail -f /var/log/exim4/mainlog<br /> <br /> === NFS Automounter ===<br /> <br /> apt install autofs nfs-common -y<br /> <br /> To allow remove mounts to be accessed under /net/&lt;server&gt;/&lt;export&gt;, edit /etc/auto.master and enable the host map:<br /> /net -hosts --timeout=60<br /> <br /> systemctl enable autofs<br /> systemctl restart autofs<br /> <br /> To mount remote mail directory:<br /> <br /> Create the new /etc/auto.master.d/mail.autofs file:<br /> /- /etc/auto.direct --timeout=60<br /> <br /> Create the /etc/auto.direct file:<br /> /var/mail -fstype=nfs,rw,soft,intr,tcp,rsize=8192,wsize=8192 mailhost:/var/spool/mail<br /> <br /> systemctl restart autofs<br /> <br /> === NTP Client ===<br /> <br /> apt install systemd-timesyncd -y<br /> <br /> Edit /etc/systemd/timesyncd.conf and set NTP parameter<br /> systemctl restart systemd-timesyncd<br /> timedatectl status<br /> timedatectl timesync-status<br /> <br /> === Swap ===<br /> free -m<br /> swapon --show<br /> <br /> To see current zram configuration:<br /> zramctl <br /> zramctl --output-all /dev/zram0<br /> <br /> Configure in /etc/rpi/swap.conf<br /> [Zram]<br /> FixedSizeMiB=512<br /> <br /> dd filesystem swap:<br /> swapoff -a<br /> dd if=/dev/zero of=/swapfile bs=1M count=1024<br /> chmod 600 /swapfile<br /> mkswap /swapfile<br /> swapon /swapfile<br /> <br /> Add to /etc/fstab:<br /> /swapfile none swap sw 0 0<br /> <br /> === Temperature ===<br /> <br /> echo &quot;scale=2; $(cat /sys/class/thermal/thermal_zone0/temp) / 1000&quot; | bc<br /> <br /> CPU Core throttling above 80 C.</div>

NickPGSmith https://www.smithnet.org.uk/wiki/index.php?title=Rasberry_Pi&diff=1739 2026-05-28T20:13:27Z

<p>NickPGSmith: /* Swap */</p> <hr /> <div>== Device ==<br /> <br /> * [https://www.raspberrypi.com/documentation/computers/raspberry-pi.html#raspberry-pi-3-model-b Rasberry Pi 3B] (&quot;Rev 1.2&quot;)<br /> <br /> cat /proc/device-tree/model<br /> <br /> Hardware info:<br /> * AV Connector:<br /> ** 1 (tip): L Audio<br /> ** 2: R Audio<br /> ** 3: Ground<br /> ** Sleeve: Composite Video.<br /> * [https://www.raspberrypi.com/documentation/computers/raspberry-pi.html Boards]<br /> * [https://www.raspberrypi.com/documentation/computers/raspberry-pi.html#gpio GPIO Header]<br /> <br /> == Rasbery Pi OS ==<br /> <br /> See [https://www.raspberrypi.com/documentation/computers/config_txt.html /boot/firmware/config.txt].<br /> <br /> Command line configuration program:<br /> raspi-config<br /> <br /> Upgrade:<br /> apt update &amp;&amp; sudo apt upgrade -y<br /> <br /> === Apache Web Server ===<br /> <br /> apt install apache2 -y<br /> <br /> * Configuration: /etc/apache2<br /> * Serve from: /var/www/html<br /> <br /> === Composite Video ===<br /> <br /> In /boot/firmware/config.txt:<br /> enable_tvout=1<br /> dtoverlay=vc4-kms-v3d,composite<br /> <br /> Ensure hdmi_force_hotplug=1 is commented out or set to 0.<br /> <br /> In /boot/firmware/cmdline.txt, either:<br /> vc4.tv_norm=PAL<br /> vc4.tv_norm=NTSC<br /> <br /> To control overscan, see settings:<br /> margin_left<br /> margin_right<br /> <br /> === Go Development ===<br /> <br /> Because of limited RAM, best to cross compile on a more powerful system:<br /> CGO_ENABLED=0 GOOS=linux GOARCH=arm GOARM=7 go build myprog.go<br /> <br /> Or install ARMv6 release:<br /> wget https://go.dev/dl/go1.26.3.linux-armv6l.tar.gz<br /> tar -C /usr/local -xzf go1.26.3.linux-armv6l.tar.gz<br /> <br /> Set environment variables:<br /> PATH=$PATH:/usr/local/go/bin<br /> GOPATH=$HOME/go<br /> <br /> === GPIO Development ===<br /> <br /> Raspberry Pi OS use the newer gpiod subsystem (which interacts with /dev/gpiochip0).<br /> <br /> In C++:<br /> apt install libgpiod-dev gpiod -y<br /> g++ -O3 prog.cpp -o prog -lgpiodcxx<br /> <br /> See [https://libgpiod.readthedocs.io/en/master/ documentation].<br /> <br /> In Python, use:<br /> apt install python3-dev -y<br /> <br /> for python gpiod bindings. See [https://pypi.org/project/gpiod/ documentation]. <br /> <br /> Or the abstraction:<br /> apt install python3-gpiozero -y<br /> <br /> In Go, use: periph.io<br /> <br /> === Mail ===<br /> <br /> MUA:<br /> apt install bsd-mailx<br /> apt install mutt<br /> <br /> Mount mail directory from server:<br /> mailhost:/var/spool/mail /var/mail nfs rw,nofail,noatime,_netdev,soft,intr 0 0<br /> <br /> Or use automounter (see other section). Note: UID/GID must match.<br /> <br /> Exim is the default MTA:<br /> dpkg-reconfigure exim4-config<br /> update-exim4.conf<br /> systemctl restart exim4<br /> <br /> Monitor logs:<br /> tail -f /var/log/exim4/mainlog<br /> <br /> === NFS Automounter ===<br /> <br /> apt install autofs nfs-common -y<br /> <br /> To allow remove mounts to be accessed under /net/&lt;server&gt;/&lt;export&gt;, edit /etc/auto.master and enable the host map:<br /> /net -hosts --timeout=60<br /> <br /> systemctl enable autofs<br /> systemctl restart autofs<br /> <br /> To mount remote mail directory:<br /> <br /> Create the new /etc/auto.master.d/mail.autofs file:<br /> /- /etc/auto.direct --timeout=60<br /> <br /> Create the /etc/auto.direct file:<br /> /var/mail -fstype=nfs,rw,soft,intr,tcp,rsize=8192,wsize=8192 mailhost:/var/spool/mail<br /> <br /> systemctl restart autofs<br /> <br /> === NTP Client ===<br /> <br /> apt install systemd-timesyncd -y<br /> <br /> Edit /etc/systemd/timesyncd.conf and set NTP parameter<br /> systemctl restart systemd-timesyncd<br /> timedatectl status<br /> timedatectl timesync-status<br /> <br /> === Swap ===<br /> free -m<br /> swapon --show<br /> <br /> To see current zram configuration:<br /> zramctl <br /> zramctl --output-all /dev/zram0<br /> <br /> Configure in /etc/rpi/swap.conf<br /> [Zram]<br /> FixedSizeMiB=512<br /> <br /> dd filesystem swap:<br /> swapoff -a<br /> dd if=/dev/zero of=/swapfile bs=1M count=1024<br /> chmod 600 /swapfile<br /> mkswap /swapfile<br /> swapon /swapfile<br /> <br /> Add to /etc/fstab:<br /> /swapfile none swap sw 0 0<br /> <br /> === Temperature ===<br /> <br /> echo &quot;scale=2; $(cat /sys/class/thermal/thermal_zone0/temp) / 1000&quot; | bc<br /> <br /> CPU Core throttling above 80 C.</div>

NickPGSmith https://www.smithnet.org.uk/wiki/index.php?title=Rasberry_Pi&diff=1738 2026-05-28T08:47:39Z

<p>NickPGSmith: /* GPIO Development */</p> <hr /> <div>== Device ==<br /> <br /> * [https://www.raspberrypi.com/documentation/computers/raspberry-pi.html#raspberry-pi-3-model-b Rasberry Pi 3B] (&quot;Rev 1.2&quot;)<br /> <br /> cat /proc/device-tree/model<br /> <br /> Hardware info:<br /> * AV Connector:<br /> ** 1 (tip): L Audio<br /> ** 2: R Audio<br /> ** 3: Ground<br /> ** Sleeve: Composite Video.<br /> * [https://www.raspberrypi.com/documentation/computers/raspberry-pi.html Boards]<br /> * [https://www.raspberrypi.com/documentation/computers/raspberry-pi.html#gpio GPIO Header]<br /> <br /> == Rasbery Pi OS ==<br /> <br /> See [https://www.raspberrypi.com/documentation/computers/config_txt.html /boot/firmware/config.txt].<br /> <br /> Command line configuration program:<br /> raspi-config<br /> <br /> Upgrade:<br /> apt update &amp;&amp; sudo apt upgrade -y<br /> <br /> === Apache Web Server ===<br /> <br /> apt install apache2 -y<br /> <br /> * Configuration: /etc/apache2<br /> * Serve from: /var/www/html<br /> <br /> === Composite Video ===<br /> <br /> In /boot/firmware/config.txt:<br /> enable_tvout=1<br /> dtoverlay=vc4-kms-v3d,composite<br /> <br /> Ensure hdmi_force_hotplug=1 is commented out or set to 0.<br /> <br /> In /boot/firmware/cmdline.txt, either:<br /> vc4.tv_norm=PAL<br /> vc4.tv_norm=NTSC<br /> <br /> To control overscan, see settings:<br /> margin_left<br /> margin_right<br /> <br /> === Go Development ===<br /> <br /> Because of limited RAM, best to cross compile on a more powerful system:<br /> CGO_ENABLED=0 GOOS=linux GOARCH=arm GOARM=7 go build myprog.go<br /> <br /> Or install ARMv6 release:<br /> wget https://go.dev/dl/go1.26.3.linux-armv6l.tar.gz<br /> tar -C /usr/local -xzf go1.26.3.linux-armv6l.tar.gz<br /> <br /> Set environment variables:<br /> PATH=$PATH:/usr/local/go/bin<br /> GOPATH=$HOME/go<br /> <br /> === GPIO Development ===<br /> <br /> Raspberry Pi OS use the newer gpiod subsystem (which interacts with /dev/gpiochip0).<br /> <br /> In C++:<br /> apt install libgpiod-dev gpiod -y<br /> g++ -O3 prog.cpp -o prog -lgpiodcxx<br /> <br /> See [https://libgpiod.readthedocs.io/en/master/ documentation].<br /> <br /> In Python, use:<br /> apt install python3-dev -y<br /> <br /> for python gpiod bindings. See [https://pypi.org/project/gpiod/ documentation]. <br /> <br /> Or the abstraction:<br /> apt install python3-gpiozero -y<br /> <br /> In Go, use: periph.io<br /> <br /> === Mail ===<br /> <br /> MUA:<br /> apt install bsd-mailx<br /> apt install mutt<br /> <br /> Mount mail directory from server:<br /> mailhost:/var/spool/mail /var/mail nfs rw,nofail,noatime,_netdev,soft,intr 0 0<br /> <br /> Or use automounter (see other section). Note: UID/GID must match.<br /> <br /> Exim is the default MTA:<br /> dpkg-reconfigure exim4-config<br /> update-exim4.conf<br /> systemctl restart exim4<br /> <br /> Monitor logs:<br /> tail -f /var/log/exim4/mainlog<br /> <br /> === NFS Automounter ===<br /> <br /> apt install autofs nfs-common -y<br /> <br /> To allow remove mounts to be accessed under /net/&lt;server&gt;/&lt;export&gt;, edit /etc/auto.master and enable the host map:<br /> /net -hosts --timeout=60<br /> <br /> systemctl enable autofs<br /> systemctl restart autofs<br /> <br /> To mount remote mail directory:<br /> <br /> Create the new /etc/auto.master.d/mail.autofs file:<br /> /- /etc/auto.direct --timeout=60<br /> <br /> Create the /etc/auto.direct file:<br /> /var/mail -fstype=nfs,rw,soft,intr,tcp,rsize=8192,wsize=8192 mailhost:/var/spool/mail<br /> <br /> systemctl restart autofs<br /> <br /> === NTP Client ===<br /> <br /> apt install systemd-timesyncd -y<br /> <br /> Edit /etc/systemd/timesyncd.conf and set NTP parameter<br /> systemctl restart systemd-timesyncd<br /> timedatectl status<br /> timedatectl timesync-status<br /> <br /> === Swap ===<br /> free -m<br /> swapon --show<br /> <br /> Add filesystem swap:<br /> swapoff -a<br /> dd if=/dev/zero of=/swapfile bs=1M count=1024<br /> chmod 600 /swapfile<br /> mkswap /swapfile<br /> swapon /swapfile<br /> <br /> Add to /etc/fstab:<br /> /swapfile none swap sw 0 0<br /> <br /> To see current zram configuration:<br /> zramctl <br /> zramctl --output-all /dev/zram0<br /> <br /> To resize:<br /> swapoff /dev/zram0<br /> zramctl --reset /dev/zram0<br /> zramctl --find --size 512M<br /> mkswap /dev/zram0<br /> swapon /dev/zram0<br /> <br /> === Temperature ===<br /> <br /> echo &quot;scale=2; $(cat /sys/class/thermal/thermal_zone0/temp) / 1000&quot; | bc<br /> <br /> CPU Core throttling above 80 C.</div>

NickPGSmith https://www.smithnet.org.uk/wiki/index.php?title=Rasberry_Pi&diff=1737 2026-05-28T08:47:11Z

<p>NickPGSmith: /* GPIO Development */</p> <hr /> <div>== Device ==<br /> <br /> * [https://www.raspberrypi.com/documentation/computers/raspberry-pi.html#raspberry-pi-3-model-b Rasberry Pi 3B] (&quot;Rev 1.2&quot;)<br /> <br /> cat /proc/device-tree/model<br /> <br /> Hardware info:<br /> * AV Connector:<br /> ** 1 (tip): L Audio<br /> ** 2: R Audio<br /> ** 3: Ground<br /> ** Sleeve: Composite Video.<br /> * [https://www.raspberrypi.com/documentation/computers/raspberry-pi.html Boards]<br /> * [https://www.raspberrypi.com/documentation/computers/raspberry-pi.html#gpio GPIO Header]<br /> <br /> == Rasbery Pi OS ==<br /> <br /> See [https://www.raspberrypi.com/documentation/computers/config_txt.html /boot/firmware/config.txt].<br /> <br /> Command line configuration program:<br /> raspi-config<br /> <br /> Upgrade:<br /> apt update &amp;&amp; sudo apt upgrade -y<br /> <br /> === Apache Web Server ===<br /> <br /> apt install apache2 -y<br /> <br /> * Configuration: /etc/apache2<br /> * Serve from: /var/www/html<br /> <br /> === Composite Video ===<br /> <br /> In /boot/firmware/config.txt:<br /> enable_tvout=1<br /> dtoverlay=vc4-kms-v3d,composite<br /> <br /> Ensure hdmi_force_hotplug=1 is commented out or set to 0.<br /> <br /> In /boot/firmware/cmdline.txt, either:<br /> vc4.tv_norm=PAL<br /> vc4.tv_norm=NTSC<br /> <br /> To control overscan, see settings:<br /> margin_left<br /> margin_right<br /> <br /> === Go Development ===<br /> <br /> Because of limited RAM, best to cross compile on a more powerful system:<br /> CGO_ENABLED=0 GOOS=linux GOARCH=arm GOARM=7 go build myprog.go<br /> <br /> Or install ARMv6 release:<br /> wget https://go.dev/dl/go1.26.3.linux-armv6l.tar.gz<br /> tar -C /usr/local -xzf go1.26.3.linux-armv6l.tar.gz<br /> <br /> Set environment variables:<br /> PATH=$PATH:/usr/local/go/bin<br /> GOPATH=$HOME/go<br /> <br /> === GPIO Development ===<br /> <br /> Raspberry Pi OS use the newer gpiod subsystem (which interacts with /dev/gpiochip0).<br /> <br /> In C++:<br /> apt install libgpiod-dev gpiod<br /> g++ -O3 prog.cpp -o prog -lgpiodcxx<br /> <br /> See [https://libgpiod.readthedocs.io/en/master/ documentation].<br /> <br /> In Python, use:<br /> apt install python3-dev -y<br /> <br /> for python gpiod bindings. See [https://pypi.org/project/gpiod/ documentation]. <br /> <br /> Or the abstraction:<br /> apt install python3-gpiozero -y<br /> <br /> <br /> <br /> In Go, use: periph.io<br /> <br /> === Mail ===<br /> <br /> MUA:<br /> apt install bsd-mailx<br /> apt install mutt<br /> <br /> Mount mail directory from server:<br /> mailhost:/var/spool/mail /var/mail nfs rw,nofail,noatime,_netdev,soft,intr 0 0<br /> <br /> Or use automounter (see other section). Note: UID/GID must match.<br /> <br /> Exim is the default MTA:<br /> dpkg-reconfigure exim4-config<br /> update-exim4.conf<br /> systemctl restart exim4<br /> <br /> Monitor logs:<br /> tail -f /var/log/exim4/mainlog<br /> <br /> === NFS Automounter ===<br /> <br /> apt install autofs nfs-common -y<br /> <br /> To allow remove mounts to be accessed under /net/&lt;server&gt;/&lt;export&gt;, edit /etc/auto.master and enable the host map:<br /> /net -hosts --timeout=60<br /> <br /> systemctl enable autofs<br /> systemctl restart autofs<br /> <br /> To mount remote mail directory:<br /> <br /> Create the new /etc/auto.master.d/mail.autofs file:<br /> /- /etc/auto.direct --timeout=60<br /> <br /> Create the /etc/auto.direct file:<br /> /var/mail -fstype=nfs,rw,soft,intr,tcp,rsize=8192,wsize=8192 mailhost:/var/spool/mail<br /> <br /> systemctl restart autofs<br /> <br /> === NTP Client ===<br /> <br /> apt install systemd-timesyncd -y<br /> <br /> Edit /etc/systemd/timesyncd.conf and set NTP parameter<br /> systemctl restart systemd-timesyncd<br /> timedatectl status<br /> timedatectl timesync-status<br /> <br /> === Swap ===<br /> free -m<br /> swapon --show<br /> <br /> Add filesystem swap:<br /> swapoff -a<br /> dd if=/dev/zero of=/swapfile bs=1M count=1024<br /> chmod 600 /swapfile<br /> mkswap /swapfile<br /> swapon /swapfile<br /> <br /> Add to /etc/fstab:<br /> /swapfile none swap sw 0 0<br /> <br /> To see current zram configuration:<br /> zramctl <br /> zramctl --output-all /dev/zram0<br /> <br /> To resize:<br /> swapoff /dev/zram0<br /> zramctl --reset /dev/zram0<br /> zramctl --find --size 512M<br /> mkswap /dev/zram0<br /> swapon /dev/zram0<br /> <br /> === Temperature ===<br /> <br /> echo &quot;scale=2; $(cat /sys/class/thermal/thermal_zone0/temp) / 1000&quot; | bc<br /> <br /> CPU Core throttling above 80 C.</div>

NickPGSmith https://www.smithnet.org.uk/wiki/index.php?title=Rasberry_Pi&diff=1736 2026-05-28T08:14:22Z

<p>NickPGSmith: /* GPIO Development */</p> <hr /> <div>== Device ==<br /> <br /> * [https://www.raspberrypi.com/documentation/computers/raspberry-pi.html#raspberry-pi-3-model-b Rasberry Pi 3B] (&quot;Rev 1.2&quot;)<br /> <br /> cat /proc/device-tree/model<br /> <br /> Hardware info:<br /> * AV Connector:<br /> ** 1 (tip): L Audio<br /> ** 2: R Audio<br /> ** 3: Ground<br /> ** Sleeve: Composite Video.<br /> * [https://www.raspberrypi.com/documentation/computers/raspberry-pi.html Boards]<br /> * [https://www.raspberrypi.com/documentation/computers/raspberry-pi.html#gpio GPIO Header]<br /> <br /> == Rasbery Pi OS ==<br /> <br /> See [https://www.raspberrypi.com/documentation/computers/config_txt.html /boot/firmware/config.txt].<br /> <br /> Command line configuration program:<br /> raspi-config<br /> <br /> Upgrade:<br /> apt update &amp;&amp; sudo apt upgrade -y<br /> <br /> === Apache Web Server ===<br /> <br /> apt install apache2 -y<br /> <br /> * Configuration: /etc/apache2<br /> * Serve from: /var/www/html<br /> <br /> === Composite Video ===<br /> <br /> In /boot/firmware/config.txt:<br /> enable_tvout=1<br /> dtoverlay=vc4-kms-v3d,composite<br /> <br /> Ensure hdmi_force_hotplug=1 is commented out or set to 0.<br /> <br /> In /boot/firmware/cmdline.txt, either:<br /> vc4.tv_norm=PAL<br /> vc4.tv_norm=NTSC<br /> <br /> To control overscan, see settings:<br /> margin_left<br /> margin_right<br /> <br /> === Go Development ===<br /> <br /> Because of limited RAM, best to cross compile on a more powerful system:<br /> CGO_ENABLED=0 GOOS=linux GOARCH=arm GOARM=7 go build myprog.go<br /> <br /> Or install ARMv6 release:<br /> wget https://go.dev/dl/go1.26.3.linux-armv6l.tar.gz<br /> tar -C /usr/local -xzf go1.26.3.linux-armv6l.tar.gz<br /> <br /> Set environment variables:<br /> PATH=$PATH:/usr/local/go/bin<br /> GOPATH=$HOME/go<br /> <br /> === GPIO Development ===<br /> <br /> Raspberry Pi OS use the newer gpiod subsystem (which interacts with /dev/gpiochip0).<br /> <br /> In C++:<br /> apt install libgpiod-dev gpiod<br /> g++ -O3 prog.cpp -o prog -lgpiodcxx<br /> <br /> See [https://libgpiod.readthedocs.io/en/master/ documentation]<br /> <br /> In Python, use:<br /> apt install python3-gpiozero -y<br /> <br /> In Go, use: periph.io<br /> <br /> === Mail ===<br /> <br /> MUA:<br /> apt install bsd-mailx<br /> apt install mutt<br /> <br /> Mount mail directory from server:<br /> mailhost:/var/spool/mail /var/mail nfs rw,nofail,noatime,_netdev,soft,intr 0 0<br /> <br /> Or use automounter (see other section). Note: UID/GID must match.<br /> <br /> Exim is the default MTA:<br /> dpkg-reconfigure exim4-config<br /> update-exim4.conf<br /> systemctl restart exim4<br /> <br /> Monitor logs:<br /> tail -f /var/log/exim4/mainlog<br /> <br /> === NFS Automounter ===<br /> <br /> apt install autofs nfs-common -y<br /> <br /> To allow remove mounts to be accessed under /net/&lt;server&gt;/&lt;export&gt;, edit /etc/auto.master and enable the host map:<br /> /net -hosts --timeout=60<br /> <br /> systemctl enable autofs<br /> systemctl restart autofs<br /> <br /> To mount remote mail directory:<br /> <br /> Create the new /etc/auto.master.d/mail.autofs file:<br /> /- /etc/auto.direct --timeout=60<br /> <br /> Create the /etc/auto.direct file:<br /> /var/mail -fstype=nfs,rw,soft,intr,tcp,rsize=8192,wsize=8192 mailhost:/var/spool/mail<br /> <br /> systemctl restart autofs<br /> <br /> === NTP Client ===<br /> <br /> apt install systemd-timesyncd -y<br /> <br /> Edit /etc/systemd/timesyncd.conf and set NTP parameter<br /> systemctl restart systemd-timesyncd<br /> timedatectl status<br /> timedatectl timesync-status<br /> <br /> === Swap ===<br /> free -m<br /> swapon --show<br /> <br /> Add filesystem swap:<br /> swapoff -a<br /> dd if=/dev/zero of=/swapfile bs=1M count=1024<br /> chmod 600 /swapfile<br /> mkswap /swapfile<br /> swapon /swapfile<br /> <br /> Add to /etc/fstab:<br /> /swapfile none swap sw 0 0<br /> <br /> To see current zram configuration:<br /> zramctl <br /> zramctl --output-all /dev/zram0<br /> <br /> To resize:<br /> swapoff /dev/zram0<br /> zramctl --reset /dev/zram0<br /> zramctl --find --size 512M<br /> mkswap /dev/zram0<br /> swapon /dev/zram0<br /> <br /> === Temperature ===<br /> <br /> echo &quot;scale=2; $(cat /sys/class/thermal/thermal_zone0/temp) / 1000&quot; | bc<br /> <br /> CPU Core throttling above 80 C.</div>

NickPGSmith https://www.smithnet.org.uk/wiki/index.php?title=Rasberry_Pi&diff=1735 2026-05-28T08:06:50Z

<p>NickPGSmith: /* Go Development */</p> <hr /> <div>== Device ==<br /> <br /> * [https://www.raspberrypi.com/documentation/computers/raspberry-pi.html#raspberry-pi-3-model-b Rasberry Pi 3B] (&quot;Rev 1.2&quot;)<br /> <br /> cat /proc/device-tree/model<br /> <br /> Hardware info:<br /> * AV Connector:<br /> ** 1 (tip): L Audio<br /> ** 2: R Audio<br /> ** 3: Ground<br /> ** Sleeve: Composite Video.<br /> * [https://www.raspberrypi.com/documentation/computers/raspberry-pi.html Boards]<br /> * [https://www.raspberrypi.com/documentation/computers/raspberry-pi.html#gpio GPIO Header]<br /> <br /> == Rasbery Pi OS ==<br /> <br /> See [https://www.raspberrypi.com/documentation/computers/config_txt.html /boot/firmware/config.txt].<br /> <br /> Command line configuration program:<br /> raspi-config<br /> <br /> Upgrade:<br /> apt update &amp;&amp; sudo apt upgrade -y<br /> <br /> === Apache Web Server ===<br /> <br /> apt install apache2 -y<br /> <br /> * Configuration: /etc/apache2<br /> * Serve from: /var/www/html<br /> <br /> === Composite Video ===<br /> <br /> In /boot/firmware/config.txt:<br /> enable_tvout=1<br /> dtoverlay=vc4-kms-v3d,composite<br /> <br /> Ensure hdmi_force_hotplug=1 is commented out or set to 0.<br /> <br /> In /boot/firmware/cmdline.txt, either:<br /> vc4.tv_norm=PAL<br /> vc4.tv_norm=NTSC<br /> <br /> To control overscan, see settings:<br /> margin_left<br /> margin_right<br /> <br /> === Go Development ===<br /> <br /> Because of limited RAM, best to cross compile on a more powerful system:<br /> CGO_ENABLED=0 GOOS=linux GOARCH=arm GOARM=7 go build myprog.go<br /> <br /> Or install ARMv6 release:<br /> wget https://go.dev/dl/go1.26.3.linux-armv6l.tar.gz<br /> tar -C /usr/local -xzf go1.26.3.linux-armv6l.tar.gz<br /> <br /> Set environment variables:<br /> PATH=$PATH:/usr/local/go/bin<br /> GOPATH=$HOME/go<br /> <br /> === GPIO Development ===<br /> <br /> Raspberry Pi OS use the newer gpiod subsystem (which interacts with /dev/gpiochip).<br /> <br /> In C++:<br /> apt install libgpiod-dev gpiod<br /> g++ -O3 prog.cpp -o prog -lgpiodcxx<br /> <br /> In Python, use:<br /> apt install python3-gpiozero -y<br /> <br /> In Go, use: periph.io<br /> <br /> === Mail ===<br /> <br /> MUA:<br /> apt install bsd-mailx<br /> apt install mutt<br /> <br /> Mount mail directory from server:<br /> mailhost:/var/spool/mail /var/mail nfs rw,nofail,noatime,_netdev,soft,intr 0 0<br /> <br /> Or use automounter (see other section). Note: UID/GID must match.<br /> <br /> Exim is the default MTA:<br /> dpkg-reconfigure exim4-config<br /> update-exim4.conf<br /> systemctl restart exim4<br /> <br /> Monitor logs:<br /> tail -f /var/log/exim4/mainlog<br /> <br /> === NFS Automounter ===<br /> <br /> apt install autofs nfs-common -y<br /> <br /> To allow remove mounts to be accessed under /net/&lt;server&gt;/&lt;export&gt;, edit /etc/auto.master and enable the host map:<br /> /net -hosts --timeout=60<br /> <br /> systemctl enable autofs<br /> systemctl restart autofs<br /> <br /> To mount remote mail directory:<br /> <br /> Create the new /etc/auto.master.d/mail.autofs file:<br /> /- /etc/auto.direct --timeout=60<br /> <br /> Create the /etc/auto.direct file:<br /> /var/mail -fstype=nfs,rw,soft,intr,tcp,rsize=8192,wsize=8192 mailhost:/var/spool/mail<br /> <br /> systemctl restart autofs<br /> <br /> === NTP Client ===<br /> <br /> apt install systemd-timesyncd -y<br /> <br /> Edit /etc/systemd/timesyncd.conf and set NTP parameter<br /> systemctl restart systemd-timesyncd<br /> timedatectl status<br /> timedatectl timesync-status<br /> <br /> === Swap ===<br /> free -m<br /> swapon --show<br /> <br /> Add filesystem swap:<br /> swapoff -a<br /> dd if=/dev/zero of=/swapfile bs=1M count=1024<br /> chmod 600 /swapfile<br /> mkswap /swapfile<br /> swapon /swapfile<br /> <br /> Add to /etc/fstab:<br /> /swapfile none swap sw 0 0<br /> <br /> To see current zram configuration:<br /> zramctl <br /> zramctl --output-all /dev/zram0<br /> <br /> To resize:<br /> swapoff /dev/zram0<br /> zramctl --reset /dev/zram0<br /> zramctl --find --size 512M<br /> mkswap /dev/zram0<br /> swapon /dev/zram0<br /> <br /> === Temperature ===<br /> <br /> echo &quot;scale=2; $(cat /sys/class/thermal/thermal_zone0/temp) / 1000&quot; | bc<br /> <br /> CPU Core throttling above 80 C.</div>

NickPGSmith https://www.smithnet.org.uk/wiki/index.php?title=Rasberry_Pi&diff=1734 2026-05-27T20:24:18Z

<p>NickPGSmith: /* GPIO Development */</p> <hr /> <div>== Device ==<br /> <br /> * [https://www.raspberrypi.com/documentation/computers/raspberry-pi.html#raspberry-pi-3-model-b Rasberry Pi 3B] (&quot;Rev 1.2&quot;)<br /> <br /> cat /proc/device-tree/model<br /> <br /> Hardware info:<br /> * AV Connector:<br /> ** 1 (tip): L Audio<br /> ** 2: R Audio<br /> ** 3: Ground<br /> ** Sleeve: Composite Video.<br /> * [https://www.raspberrypi.com/documentation/computers/raspberry-pi.html Boards]<br /> * [https://www.raspberrypi.com/documentation/computers/raspberry-pi.html#gpio GPIO Header]<br /> <br /> == Rasbery Pi OS ==<br /> <br /> See [https://www.raspberrypi.com/documentation/computers/config_txt.html /boot/firmware/config.txt].<br /> <br /> Command line configuration program:<br /> raspi-config<br /> <br /> Upgrade:<br /> apt update &amp;&amp; sudo apt upgrade -y<br /> <br /> === Apache Web Server ===<br /> <br /> apt install apache2 -y<br /> <br /> * Configuration: /etc/apache2<br /> * Serve from: /var/www/html<br /> <br /> === Composite Video ===<br /> <br /> In /boot/firmware/config.txt:<br /> enable_tvout=1<br /> dtoverlay=vc4-kms-v3d,composite<br /> <br /> Ensure hdmi_force_hotplug=1 is commented out or set to 0.<br /> <br /> In /boot/firmware/cmdline.txt, either:<br /> vc4.tv_norm=PAL<br /> vc4.tv_norm=NTSC<br /> <br /> To control overscan, see settings:<br /> margin_left<br /> margin_right<br /> <br /> === Go Development ===<br /> <br /> Because of limited RAM, best to cross compile on a more powerful system:<br /> CGO_ENABLED=0 GOOS=linux GOARCH=arm GOARM=7 go build myprog.go<br /> <br /> === GPIO Development ===<br /> <br /> Raspberry Pi OS use the newer gpiod subsystem (which interacts with /dev/gpiochip).<br /> <br /> In C++:<br /> apt install libgpiod-dev gpiod<br /> g++ -O3 prog.cpp -o prog -lgpiodcxx<br /> <br /> In Python, use:<br /> apt install python3-gpiozero -y<br /> <br /> In Go, use: periph.io<br /> <br /> === Mail ===<br /> <br /> MUA:<br /> apt install bsd-mailx<br /> apt install mutt<br /> <br /> Mount mail directory from server:<br /> mailhost:/var/spool/mail /var/mail nfs rw,nofail,noatime,_netdev,soft,intr 0 0<br /> <br /> Or use automounter (see other section). Note: UID/GID must match.<br /> <br /> Exim is the default MTA:<br /> dpkg-reconfigure exim4-config<br /> update-exim4.conf<br /> systemctl restart exim4<br /> <br /> Monitor logs:<br /> tail -f /var/log/exim4/mainlog<br /> <br /> === NFS Automounter ===<br /> <br /> apt install autofs nfs-common -y<br /> <br /> To allow remove mounts to be accessed under /net/&lt;server&gt;/&lt;export&gt;, edit /etc/auto.master and enable the host map:<br /> /net -hosts --timeout=60<br /> <br /> systemctl enable autofs<br /> systemctl restart autofs<br /> <br /> To mount remote mail directory:<br /> <br /> Create the new /etc/auto.master.d/mail.autofs file:<br /> /- /etc/auto.direct --timeout=60<br /> <br /> Create the /etc/auto.direct file:<br /> /var/mail -fstype=nfs,rw,soft,intr,tcp,rsize=8192,wsize=8192 mailhost:/var/spool/mail<br /> <br /> systemctl restart autofs<br /> <br /> === NTP Client ===<br /> <br /> apt install systemd-timesyncd -y<br /> <br /> Edit /etc/systemd/timesyncd.conf and set NTP parameter<br /> systemctl restart systemd-timesyncd<br /> timedatectl status<br /> timedatectl timesync-status<br /> <br /> === Swap ===<br /> free -m<br /> swapon --show<br /> <br /> Add filesystem swap:<br /> swapoff -a<br /> dd if=/dev/zero of=/swapfile bs=1M count=1024<br /> chmod 600 /swapfile<br /> mkswap /swapfile<br /> swapon /swapfile<br /> <br /> Add to /etc/fstab:<br /> /swapfile none swap sw 0 0<br /> <br /> To see current zram configuration:<br /> zramctl <br /> zramctl --output-all /dev/zram0<br /> <br /> To resize:<br /> swapoff /dev/zram0<br /> zramctl --reset /dev/zram0<br /> zramctl --find --size 512M<br /> mkswap /dev/zram0<br /> swapon /dev/zram0<br /> <br /> === Temperature ===<br /> <br /> echo &quot;scale=2; $(cat /sys/class/thermal/thermal_zone0/temp) / 1000&quot; | bc<br /> <br /> CPU Core throttling above 80 C.</div>

NickPGSmith https://www.smithnet.org.uk/wiki/index.php?title=Rasberry_Pi&diff=1733 2026-05-27T17:10:45Z

<p>NickPGSmith: /* NFS Automounter */</p> <hr /> <div>== Device ==<br /> <br /> * [https://www.raspberrypi.com/documentation/computers/raspberry-pi.html#raspberry-pi-3-model-b Rasberry Pi 3B] (&quot;Rev 1.2&quot;)<br /> <br /> cat /proc/device-tree/model<br /> <br /> Hardware info:<br /> * AV Connector:<br /> ** 1 (tip): L Audio<br /> ** 2: R Audio<br /> ** 3: Ground<br /> ** Sleeve: Composite Video.<br /> * [https://www.raspberrypi.com/documentation/computers/raspberry-pi.html Boards]<br /> * [https://www.raspberrypi.com/documentation/computers/raspberry-pi.html#gpio GPIO Header]<br /> <br /> == Rasbery Pi OS ==<br /> <br /> See [https://www.raspberrypi.com/documentation/computers/config_txt.html /boot/firmware/config.txt].<br /> <br /> Command line configuration program:<br /> raspi-config<br /> <br /> Upgrade:<br /> apt update &amp;&amp; sudo apt upgrade -y<br /> <br /> === Apache Web Server ===<br /> <br /> apt install apache2 -y<br /> <br /> * Configuration: /etc/apache2<br /> * Serve from: /var/www/html<br /> <br /> === Composite Video ===<br /> <br /> In /boot/firmware/config.txt:<br /> enable_tvout=1<br /> dtoverlay=vc4-kms-v3d,composite<br /> <br /> Ensure hdmi_force_hotplug=1 is commented out or set to 0.<br /> <br /> In /boot/firmware/cmdline.txt, either:<br /> vc4.tv_norm=PAL<br /> vc4.tv_norm=NTSC<br /> <br /> To control overscan, see settings:<br /> margin_left<br /> margin_right<br /> <br /> === Go Development ===<br /> <br /> Because of limited RAM, best to cross compile on a more powerful system:<br /> CGO_ENABLED=0 GOOS=linux GOARCH=arm GOARM=7 go build myprog.go<br /> <br /> === GPIO Development ===<br /> <br /> Raspberry Pi OS use the newer gpiod subsystem (which interacts with /dev/gpiochip).<br /> <br /> In Python, use:<br /> apt install python3-gpiozero -y<br /> <br /> In Go, use: periph.io<br /> <br /> === Mail ===<br /> <br /> MUA:<br /> apt install bsd-mailx<br /> apt install mutt<br /> <br /> Mount mail directory from server:<br /> mailhost:/var/spool/mail /var/mail nfs rw,nofail,noatime,_netdev,soft,intr 0 0<br /> <br /> Or use automounter (see other section). Note: UID/GID must match.<br /> <br /> Exim is the default MTA:<br /> dpkg-reconfigure exim4-config<br /> update-exim4.conf<br /> systemctl restart exim4<br /> <br /> Monitor logs:<br /> tail -f /var/log/exim4/mainlog<br /> <br /> === NFS Automounter ===<br /> <br /> apt install autofs nfs-common -y<br /> <br /> To allow remove mounts to be accessed under /net/&lt;server&gt;/&lt;export&gt;, edit /etc/auto.master and enable the host map:<br /> /net -hosts --timeout=60<br /> <br /> systemctl enable autofs<br /> systemctl restart autofs<br /> <br /> To mount remote mail directory:<br /> <br /> Create the new /etc/auto.master.d/mail.autofs file:<br /> /- /etc/auto.direct --timeout=60<br /> <br /> Create the /etc/auto.direct file:<br /> /var/mail -fstype=nfs,rw,soft,intr,tcp,rsize=8192,wsize=8192 mailhost:/var/spool/mail<br /> <br /> systemctl restart autofs<br /> <br /> === NTP Client ===<br /> <br /> apt install systemd-timesyncd -y<br /> <br /> Edit /etc/systemd/timesyncd.conf and set NTP parameter<br /> systemctl restart systemd-timesyncd<br /> timedatectl status<br /> timedatectl timesync-status<br /> <br /> === Swap ===<br /> free -m<br /> swapon --show<br /> <br /> Add filesystem swap:<br /> swapoff -a<br /> dd if=/dev/zero of=/swapfile bs=1M count=1024<br /> chmod 600 /swapfile<br /> mkswap /swapfile<br /> swapon /swapfile<br /> <br /> Add to /etc/fstab:<br /> /swapfile none swap sw 0 0<br /> <br /> To see current zram configuration:<br /> zramctl <br /> zramctl --output-all /dev/zram0<br /> <br /> To resize:<br /> swapoff /dev/zram0<br /> zramctl --reset /dev/zram0<br /> zramctl --find --size 512M<br /> mkswap /dev/zram0<br /> swapon /dev/zram0<br /> <br /> === Temperature ===<br /> <br /> echo &quot;scale=2; $(cat /sys/class/thermal/thermal_zone0/temp) / 1000&quot; | bc<br /> <br /> CPU Core throttling above 80 C.</div>

NickPGSmith https://www.smithnet.org.uk/wiki/index.php?title=Rasberry_Pi&diff=1732 2026-05-27T17:10:13Z

<p>NickPGSmith: /* NFS Automounter */</p> <hr /> <div>== Device ==<br /> <br /> * [https://www.raspberrypi.com/documentation/computers/raspberry-pi.html#raspberry-pi-3-model-b Rasberry Pi 3B] (&quot;Rev 1.2&quot;)<br /> <br /> cat /proc/device-tree/model<br /> <br /> Hardware info:<br /> * AV Connector:<br /> ** 1 (tip): L Audio<br /> ** 2: R Audio<br /> ** 3: Ground<br /> ** Sleeve: Composite Video.<br /> * [https://www.raspberrypi.com/documentation/computers/raspberry-pi.html Boards]<br /> * [https://www.raspberrypi.com/documentation/computers/raspberry-pi.html#gpio GPIO Header]<br /> <br /> == Rasbery Pi OS ==<br /> <br /> See [https://www.raspberrypi.com/documentation/computers/config_txt.html /boot/firmware/config.txt].<br /> <br /> Command line configuration program:<br /> raspi-config<br /> <br /> Upgrade:<br /> apt update &amp;&amp; sudo apt upgrade -y<br /> <br /> === Apache Web Server ===<br /> <br /> apt install apache2 -y<br /> <br /> * Configuration: /etc/apache2<br /> * Serve from: /var/www/html<br /> <br /> === Composite Video ===<br /> <br /> In /boot/firmware/config.txt:<br /> enable_tvout=1<br /> dtoverlay=vc4-kms-v3d,composite<br /> <br /> Ensure hdmi_force_hotplug=1 is commented out or set to 0.<br /> <br /> In /boot/firmware/cmdline.txt, either:<br /> vc4.tv_norm=PAL<br /> vc4.tv_norm=NTSC<br /> <br /> To control overscan, see settings:<br /> margin_left<br /> margin_right<br /> <br /> === Go Development ===<br /> <br /> Because of limited RAM, best to cross compile on a more powerful system:<br /> CGO_ENABLED=0 GOOS=linux GOARCH=arm GOARM=7 go build myprog.go<br /> <br /> === GPIO Development ===<br /> <br /> Raspberry Pi OS use the newer gpiod subsystem (which interacts with /dev/gpiochip).<br /> <br /> In Python, use:<br /> apt install python3-gpiozero -y<br /> <br /> In Go, use: periph.io<br /> <br /> === Mail ===<br /> <br /> MUA:<br /> apt install bsd-mailx<br /> apt install mutt<br /> <br /> Mount mail directory from server:<br /> mailhost:/var/spool/mail /var/mail nfs rw,nofail,noatime,_netdev,soft,intr 0 0<br /> <br /> Or use automounter (see other section). Note: UID/GID must match.<br /> <br /> Exim is the default MTA:<br /> dpkg-reconfigure exim4-config<br /> update-exim4.conf<br /> systemctl restart exim4<br /> <br /> Monitor logs:<br /> tail -f /var/log/exim4/mainlog<br /> <br /> === NFS Automounter ===<br /> <br /> apt install autofs nfs-common -y<br /> <br /> Edit /etc/auto.master and enable the host map:<br /> /net -hosts --timeout=60<br /> <br /> systemctl enable autofs<br /> systemctl restart autofs<br /> <br /> To mount remote mail directory:<br /> <br /> Create the new /etc/auto.master.d/mail.autofs file:<br /> /- /etc/auto.direct --timeout=60<br /> <br /> Create the /etc/auto.direct file:<br /> /var/mail -fstype=nfs,rw,soft,intr,tcp,rsize=8192,wsize=8192 mailhost:/var/spool/mail<br /> <br /> systemctl restart autofs<br /> <br /> === NTP Client ===<br /> <br /> apt install systemd-timesyncd -y<br /> <br /> Edit /etc/systemd/timesyncd.conf and set NTP parameter<br /> systemctl restart systemd-timesyncd<br /> timedatectl status<br /> timedatectl timesync-status<br /> <br /> === Swap ===<br /> free -m<br /> swapon --show<br /> <br /> Add filesystem swap:<br /> swapoff -a<br /> dd if=/dev/zero of=/swapfile bs=1M count=1024<br /> chmod 600 /swapfile<br /> mkswap /swapfile<br /> swapon /swapfile<br /> <br /> Add to /etc/fstab:<br /> /swapfile none swap sw 0 0<br /> <br /> To see current zram configuration:<br /> zramctl <br /> zramctl --output-all /dev/zram0<br /> <br /> To resize:<br /> swapoff /dev/zram0<br /> zramctl --reset /dev/zram0<br /> zramctl --find --size 512M<br /> mkswap /dev/zram0<br /> swapon /dev/zram0<br /> <br /> === Temperature ===<br /> <br /> echo &quot;scale=2; $(cat /sys/class/thermal/thermal_zone0/temp) / 1000&quot; | bc<br /> <br /> CPU Core throttling above 80 C.</div>

NickPGSmith https://www.smithnet.org.uk/wiki/index.php?title=Rasberry_Pi&diff=1731 2026-05-27T17:09:39Z

<p>NickPGSmith: /* NFS Automounter */</p> <hr /> <div>== Device ==<br /> <br /> * [https://www.raspberrypi.com/documentation/computers/raspberry-pi.html#raspberry-pi-3-model-b Rasberry Pi 3B] (&quot;Rev 1.2&quot;)<br /> <br /> cat /proc/device-tree/model<br /> <br /> Hardware info:<br /> * AV Connector:<br /> ** 1 (tip): L Audio<br /> ** 2: R Audio<br /> ** 3: Ground<br /> ** Sleeve: Composite Video.<br /> * [https://www.raspberrypi.com/documentation/computers/raspberry-pi.html Boards]<br /> * [https://www.raspberrypi.com/documentation/computers/raspberry-pi.html#gpio GPIO Header]<br /> <br /> == Rasbery Pi OS ==<br /> <br /> See [https://www.raspberrypi.com/documentation/computers/config_txt.html /boot/firmware/config.txt].<br /> <br /> Command line configuration program:<br /> raspi-config<br /> <br /> Upgrade:<br /> apt update &amp;&amp; sudo apt upgrade -y<br /> <br /> === Apache Web Server ===<br /> <br /> apt install apache2 -y<br /> <br /> * Configuration: /etc/apache2<br /> * Serve from: /var/www/html<br /> <br /> === Composite Video ===<br /> <br /> In /boot/firmware/config.txt:<br /> enable_tvout=1<br /> dtoverlay=vc4-kms-v3d,composite<br /> <br /> Ensure hdmi_force_hotplug=1 is commented out or set to 0.<br /> <br /> In /boot/firmware/cmdline.txt, either:<br /> vc4.tv_norm=PAL<br /> vc4.tv_norm=NTSC<br /> <br /> To control overscan, see settings:<br /> margin_left<br /> margin_right<br /> <br /> === Go Development ===<br /> <br /> Because of limited RAM, best to cross compile on a more powerful system:<br /> CGO_ENABLED=0 GOOS=linux GOARCH=arm GOARM=7 go build myprog.go<br /> <br /> === GPIO Development ===<br /> <br /> Raspberry Pi OS use the newer gpiod subsystem (which interacts with /dev/gpiochip).<br /> <br /> In Python, use:<br /> apt install python3-gpiozero -y<br /> <br /> In Go, use: periph.io<br /> <br /> === Mail ===<br /> <br /> MUA:<br /> apt install bsd-mailx<br /> apt install mutt<br /> <br /> Mount mail directory from server:<br /> mailhost:/var/spool/mail /var/mail nfs rw,nofail,noatime,_netdev,soft,intr 0 0<br /> <br /> Or use automounter (see other section). Note: UID/GID must match.<br /> <br /> Exim is the default MTA:<br /> dpkg-reconfigure exim4-config<br /> update-exim4.conf<br /> systemctl restart exim4<br /> <br /> Monitor logs:<br /> tail -f /var/log/exim4/mainlog<br /> <br /> === NFS Automounter ===<br /> <br /> apt install autofs nfs-common -y<br /> <br /> Edit /etc/auto.master and enable the host map:<br /> /net -hosts --timeout=60<br /> <br /> systemctl enable autofs<br /> systemctl restart autofs<br /> <br /> To mount remove mail directory:<br /> <br /> Create the new /etc/auto.master.d/mail.autofs file:<br /> /- /etc/auto.direct --timeout=60<br /> <br /> Create the /etc/auto.direct file:<br /> /var/mail -fstype=nfs,rw,soft,intr,tcp,rsize=8192,wsize=8192 mailhost:/var/spool/mail<br /> <br /> systemctl restart autofs<br /> <br /> === NTP Client ===<br /> <br /> apt install systemd-timesyncd -y<br /> <br /> Edit /etc/systemd/timesyncd.conf and set NTP parameter<br /> systemctl restart systemd-timesyncd<br /> timedatectl status<br /> timedatectl timesync-status<br /> <br /> === Swap ===<br /> free -m<br /> swapon --show<br /> <br /> Add filesystem swap:<br /> swapoff -a<br /> dd if=/dev/zero of=/swapfile bs=1M count=1024<br /> chmod 600 /swapfile<br /> mkswap /swapfile<br /> swapon /swapfile<br /> <br /> Add to /etc/fstab:<br /> /swapfile none swap sw 0 0<br /> <br /> To see current zram configuration:<br /> zramctl <br /> zramctl --output-all /dev/zram0<br /> <br /> To resize:<br /> swapoff /dev/zram0<br /> zramctl --reset /dev/zram0<br /> zramctl --find --size 512M<br /> mkswap /dev/zram0<br /> swapon /dev/zram0<br /> <br /> === Temperature ===<br /> <br /> echo &quot;scale=2; $(cat /sys/class/thermal/thermal_zone0/temp) / 1000&quot; | bc<br /> <br /> CPU Core throttling above 80 C.</div>

NickPGSmith https://www.smithnet.org.uk/wiki/index.php?title=Rasberry_Pi&diff=1730 2026-05-27T17:07:43Z

<p>NickPGSmith: /* Mail */</p> <hr /> <div>== Device ==<br /> <br /> * [https://www.raspberrypi.com/documentation/computers/raspberry-pi.html#raspberry-pi-3-model-b Rasberry Pi 3B] (&quot;Rev 1.2&quot;)<br /> <br /> cat /proc/device-tree/model<br /> <br /> Hardware info:<br /> * AV Connector:<br /> ** 1 (tip): L Audio<br /> ** 2: R Audio<br /> ** 3: Ground<br /> ** Sleeve: Composite Video.<br /> * [https://www.raspberrypi.com/documentation/computers/raspberry-pi.html Boards]<br /> * [https://www.raspberrypi.com/documentation/computers/raspberry-pi.html#gpio GPIO Header]<br /> <br /> == Rasbery Pi OS ==<br /> <br /> See [https://www.raspberrypi.com/documentation/computers/config_txt.html /boot/firmware/config.txt].<br /> <br /> Command line configuration program:<br /> raspi-config<br /> <br /> Upgrade:<br /> apt update &amp;&amp; sudo apt upgrade -y<br /> <br /> === Apache Web Server ===<br /> <br /> apt install apache2 -y<br /> <br /> * Configuration: /etc/apache2<br /> * Serve from: /var/www/html<br /> <br /> === Composite Video ===<br /> <br /> In /boot/firmware/config.txt:<br /> enable_tvout=1<br /> dtoverlay=vc4-kms-v3d,composite<br /> <br /> Ensure hdmi_force_hotplug=1 is commented out or set to 0.<br /> <br /> In /boot/firmware/cmdline.txt, either:<br /> vc4.tv_norm=PAL<br /> vc4.tv_norm=NTSC<br /> <br /> To control overscan, see settings:<br /> margin_left<br /> margin_right<br /> <br /> === Go Development ===<br /> <br /> Because of limited RAM, best to cross compile on a more powerful system:<br /> CGO_ENABLED=0 GOOS=linux GOARCH=arm GOARM=7 go build myprog.go<br /> <br /> === GPIO Development ===<br /> <br /> Raspberry Pi OS use the newer gpiod subsystem (which interacts with /dev/gpiochip).<br /> <br /> In Python, use:<br /> apt install python3-gpiozero -y<br /> <br /> In Go, use: periph.io<br /> <br /> === Mail ===<br /> <br /> MUA:<br /> apt install bsd-mailx<br /> apt install mutt<br /> <br /> Mount mail directory from server:<br /> mailhost:/var/spool/mail /var/mail nfs rw,nofail,noatime,_netdev,soft,intr 0 0<br /> <br /> Or use automounter (see other section). Note: UID/GID must match.<br /> <br /> Exim is the default MTA:<br /> dpkg-reconfigure exim4-config<br /> update-exim4.conf<br /> systemctl restart exim4<br /> <br /> Monitor logs:<br /> tail -f /var/log/exim4/mainlog<br /> <br /> === NFS Automounter ===<br /> <br /> apt install autofs nfs-common -y<br /> <br /> Edit /etc/auto.master and enable the host map:<br /> /net -hosts --timeout=60<br /> <br /> systemctl enable autofs<br /> systemctl restart autofs<br /> <br /> === NTP Client ===<br /> <br /> apt install systemd-timesyncd -y<br /> <br /> Edit /etc/systemd/timesyncd.conf and set NTP parameter<br /> systemctl restart systemd-timesyncd<br /> timedatectl status<br /> timedatectl timesync-status<br /> <br /> === Swap ===<br /> free -m<br /> swapon --show<br /> <br /> Add filesystem swap:<br /> swapoff -a<br /> dd if=/dev/zero of=/swapfile bs=1M count=1024<br /> chmod 600 /swapfile<br /> mkswap /swapfile<br /> swapon /swapfile<br /> <br /> Add to /etc/fstab:<br /> /swapfile none swap sw 0 0<br /> <br /> To see current zram configuration:<br /> zramctl <br /> zramctl --output-all /dev/zram0<br /> <br /> To resize:<br /> swapoff /dev/zram0<br /> zramctl --reset /dev/zram0<br /> zramctl --find --size 512M<br /> mkswap /dev/zram0<br /> swapon /dev/zram0<br /> <br /> === Temperature ===<br /> <br /> echo &quot;scale=2; $(cat /sys/class/thermal/thermal_zone0/temp) / 1000&quot; | bc<br /> <br /> CPU Core throttling above 80 C.</div>

NickPGSmith https://www.smithnet.org.uk/wiki/index.php?title=Rasberry_Pi&diff=1729 2026-05-27T16:33:14Z

<p>NickPGSmith: /* Device */</p> <hr /> <div>== Device ==<br /> <br /> * [https://www.raspberrypi.com/documentation/computers/raspberry-pi.html#raspberry-pi-3-model-b Rasberry Pi 3B] (&quot;Rev 1.2&quot;)<br /> <br /> cat /proc/device-tree/model<br /> <br /> Hardware info:<br /> * AV Connector:<br /> ** 1 (tip): L Audio<br /> ** 2: R Audio<br /> ** 3: Ground<br /> ** Sleeve: Composite Video.<br /> * [https://www.raspberrypi.com/documentation/computers/raspberry-pi.html Boards]<br /> * [https://www.raspberrypi.com/documentation/computers/raspberry-pi.html#gpio GPIO Header]<br /> <br /> == Rasbery Pi OS ==<br /> <br /> See [https://www.raspberrypi.com/documentation/computers/config_txt.html /boot/firmware/config.txt].<br /> <br /> Command line configuration program:<br /> raspi-config<br /> <br /> Upgrade:<br /> apt update &amp;&amp; sudo apt upgrade -y<br /> <br /> === Apache Web Server ===<br /> <br /> apt install apache2 -y<br /> <br /> * Configuration: /etc/apache2<br /> * Serve from: /var/www/html<br /> <br /> === Composite Video ===<br /> <br /> In /boot/firmware/config.txt:<br /> enable_tvout=1<br /> dtoverlay=vc4-kms-v3d,composite<br /> <br /> Ensure hdmi_force_hotplug=1 is commented out or set to 0.<br /> <br /> In /boot/firmware/cmdline.txt, either:<br /> vc4.tv_norm=PAL<br /> vc4.tv_norm=NTSC<br /> <br /> To control overscan, see settings:<br /> margin_left<br /> margin_right<br /> <br /> === Go Development ===<br /> <br /> Because of limited RAM, best to cross compile on a more powerful system:<br /> CGO_ENABLED=0 GOOS=linux GOARCH=arm GOARM=7 go build myprog.go<br /> <br /> === GPIO Development ===<br /> <br /> Raspberry Pi OS use the newer gpiod subsystem (which interacts with /dev/gpiochip).<br /> <br /> In Python, use:<br /> apt install python3-gpiozero -y<br /> <br /> In Go, use: periph.io<br /> <br /> === Mail ===<br /> <br /> MUA:<br /> apt install bsd-mailx<br /> apt install mutt<br /> <br /> Mount mail directory from server:<br /> mailhost:/var/spool/mail /var/mail nfs rw,nofail,noatime,_netdev,soft,intr 0 0<br /> <br /> Exim is the default MTA:<br /> dpkg-reconfigure exim4-config<br /> update-exim4.conf<br /> systemctl restart exim4<br /> <br /> Monitor logs:<br /> tail -f /var/log/exim4/mainlog<br /> <br /> === NFS Automounter ===<br /> <br /> apt install autofs nfs-common -y<br /> <br /> Edit /etc/auto.master and enable the host map:<br /> /net -hosts --timeout=60<br /> <br /> systemctl enable autofs<br /> systemctl restart autofs<br /> <br /> === NTP Client ===<br /> <br /> apt install systemd-timesyncd -y<br /> <br /> Edit /etc/systemd/timesyncd.conf and set NTP parameter<br /> systemctl restart systemd-timesyncd<br /> timedatectl status<br /> timedatectl timesync-status<br /> <br /> === Swap ===<br /> free -m<br /> swapon --show<br /> <br /> Add filesystem swap:<br /> swapoff -a<br /> dd if=/dev/zero of=/swapfile bs=1M count=1024<br /> chmod 600 /swapfile<br /> mkswap /swapfile<br /> swapon /swapfile<br /> <br /> Add to /etc/fstab:<br /> /swapfile none swap sw 0 0<br /> <br /> To see current zram configuration:<br /> zramctl <br /> zramctl --output-all /dev/zram0<br /> <br /> To resize:<br /> swapoff /dev/zram0<br /> zramctl --reset /dev/zram0<br /> zramctl --find --size 512M<br /> mkswap /dev/zram0<br /> swapon /dev/zram0<br /> <br /> === Temperature ===<br /> <br /> echo &quot;scale=2; $(cat /sys/class/thermal/thermal_zone0/temp) / 1000&quot; | bc<br /> <br /> CPU Core throttling above 80 C.</div>

NickPGSmith https://www.smithnet.org.uk/wiki/index.php?title=Rasberry_Pi&diff=1728 2026-05-27T16:28:00Z

<p>NickPGSmith: </p> <hr /> <div>== Device ==<br /> <br /> * [https://www.raspberrypi.com/documentation/computers/raspberry-pi.html#raspberry-pi-3-model-b Rasberry Pi 3B] (&quot;Rev 1.2&quot;)<br /> <br /> cat /proc/device-tree/model<br /> <br /> Hardware info:<br /> * AV Connector:<br /> ** 1 (tip): L Audio<br /> ** 2: R Audio<br /> ** 3: Ground<br /> ** Sleeve: Composite Video.<br /> * [https://www.raspberrypi.com/documentation/computers/raspberry-pi.html#gpio GPIO Header]<br /> * [https://www.raspberrypi.com/documentation/computers/raspberry-pi.html Boards]<br /> <br /> == Rasbery Pi OS ==<br /> <br /> See [https://www.raspberrypi.com/documentation/computers/config_txt.html /boot/firmware/config.txt].<br /> <br /> Command line configuration program:<br /> raspi-config<br /> <br /> Upgrade:<br /> apt update &amp;&amp; sudo apt upgrade -y<br /> <br /> === Apache Web Server ===<br /> <br /> apt install apache2 -y<br /> <br /> * Configuration: /etc/apache2<br /> * Serve from: /var/www/html<br /> <br /> === Composite Video ===<br /> <br /> In /boot/firmware/config.txt:<br /> enable_tvout=1<br /> dtoverlay=vc4-kms-v3d,composite<br /> <br /> Ensure hdmi_force_hotplug=1 is commented out or set to 0.<br /> <br /> In /boot/firmware/cmdline.txt, either:<br /> vc4.tv_norm=PAL<br /> vc4.tv_norm=NTSC<br /> <br /> To control overscan, see settings:<br /> margin_left<br /> margin_right<br /> <br /> === Go Development ===<br /> <br /> Because of limited RAM, best to cross compile on a more powerful system:<br /> CGO_ENABLED=0 GOOS=linux GOARCH=arm GOARM=7 go build myprog.go<br /> <br /> === GPIO Development ===<br /> <br /> Raspberry Pi OS use the newer gpiod subsystem (which interacts with /dev/gpiochip).<br /> <br /> In Python, use:<br /> apt install python3-gpiozero -y<br /> <br /> In Go, use: periph.io<br /> <br /> === Mail ===<br /> <br /> MUA:<br /> apt install bsd-mailx<br /> apt install mutt<br /> <br /> Mount mail directory from server:<br /> mailhost:/var/spool/mail /var/mail nfs rw,nofail,noatime,_netdev,soft,intr 0 0<br /> <br /> Exim is the default MTA:<br /> dpkg-reconfigure exim4-config<br /> update-exim4.conf<br /> systemctl restart exim4<br /> <br /> Monitor logs:<br /> tail -f /var/log/exim4/mainlog<br /> <br /> === NFS Automounter ===<br /> <br /> apt install autofs nfs-common -y<br /> <br /> Edit /etc/auto.master and enable the host map:<br /> /net -hosts --timeout=60<br /> <br /> systemctl enable autofs<br /> systemctl restart autofs<br /> <br /> === NTP Client ===<br /> <br /> apt install systemd-timesyncd -y<br /> <br /> Edit /etc/systemd/timesyncd.conf and set NTP parameter<br /> systemctl restart systemd-timesyncd<br /> timedatectl status<br /> timedatectl timesync-status<br /> <br /> === Swap ===<br /> free -m<br /> swapon --show<br /> <br /> Add filesystem swap:<br /> swapoff -a<br /> dd if=/dev/zero of=/swapfile bs=1M count=1024<br /> chmod 600 /swapfile<br /> mkswap /swapfile<br /> swapon /swapfile<br /> <br /> Add to /etc/fstab:<br /> /swapfile none swap sw 0 0<br /> <br /> To see current zram configuration:<br /> zramctl <br /> zramctl --output-all /dev/zram0<br /> <br /> To resize:<br /> swapoff /dev/zram0<br /> zramctl --reset /dev/zram0<br /> zramctl --find --size 512M<br /> mkswap /dev/zram0<br /> swapon /dev/zram0<br /> <br /> === Temperature ===<br /> <br /> echo &quot;scale=2; $(cat /sys/class/thermal/thermal_zone0/temp) / 1000&quot; | bc<br /> <br /> CPU Core throttling above 80 C.</div>

NickPGSmith https://www.smithnet.org.uk/wiki/index.php?title=Rasberry_Pi&diff=1727 2026-05-27T15:59:49Z

<p>NickPGSmith: /* Mail */</p> <hr /> <div>== Device ==<br /> <br /> * [https://www.raspberrypi.com/documentation/computers/raspberry-pi.html#raspberry-pi-3-model-b Rasberry Pi 3B] (&quot;Rev 1.2&quot;)<br /> <br /> cat /proc/device-tree/model<br /> <br /> AV Connector:<br /> * 1 (tip): L Audio<br /> * 2: R Audio<br /> * 3: Ground<br /> * Sleeve: Composite Video.<br /> <br /> * [https://www.raspberrypi.com/documentation/computers/raspberry-pi.html#gpio-and-the-40-pin-header GPIO]<br /> <br /> == Rasbery Pi OS ==<br /> <br /> See [https://www.raspberrypi.com/documentation/computers/config_txt.html /boot/firmware/config.txt].<br /> <br /> Command line configuration program:<br /> raspi-config<br /> <br /> Upgrade:<br /> apt update &amp;&amp; sudo apt upgrade -y<br /> <br /> === Apache Web Server ===<br /> <br /> apt install apache2 -y<br /> <br /> * Configuration: /etc/apache2<br /> * Serve from: /var/www/html<br /> <br /> === Composite Video ===<br /> <br /> In /boot/firmware/config.txt:<br /> enable_tvout=1<br /> dtoverlay=vc4-kms-v3d,composite<br /> <br /> Ensure hdmi_force_hotplug=1 is commented out or set to 0.<br /> <br /> In /boot/firmware/cmdline.txt, either:<br /> vc4.tv_norm=PAL<br /> vc4.tv_norm=NTSC<br /> <br /> To control overscan, see settings:<br /> margin_left<br /> margin_right<br /> <br /> === Go Development ===<br /> <br /> Because of limited RAM, best to cross compile on a more powerful system:<br /> CGO_ENABLED=0 GOOS=linux GOARCH=arm GOARM=7 go build myprog.go<br /> <br /> === GPIO Development ===<br /> <br /> Raspberry Pi OS use the newer gpiod subsystem (which interacts with /dev/gpiochip).<br /> <br /> In Python, use:<br /> apt install python3-gpiozero -y<br /> <br /> In Go, use: periph.io<br /> <br /> === Mail ===<br /> <br /> MUA:<br /> apt install bsd-mailx<br /> apt install mutt<br /> <br /> Mount mail directory from server:<br /> mailhost:/var/spool/mail /var/mail nfs rw,nofail,noatime,_netdev,soft,intr 0 0<br /> <br /> Exim is the default MTA:<br /> dpkg-reconfigure exim4-config<br /> update-exim4.conf<br /> systemctl restart exim4<br /> <br /> Monitor logs:<br /> tail -f /var/log/exim4/mainlog<br /> <br /> === NFS Automounter ===<br /> <br /> apt install autofs nfs-common -y<br /> <br /> Edit /etc/auto.master and enable the host map:<br /> /net -hosts --timeout=60<br /> <br /> systemctl enable autofs<br /> systemctl restart autofs<br /> <br /> === NTP Client ===<br /> <br /> apt install systemd-timesyncd -y<br /> <br /> Edit /etc/systemd/timesyncd.conf and set NTP parameter<br /> systemctl restart systemd-timesyncd<br /> timedatectl status<br /> timedatectl timesync-status<br /> <br /> === Swap ===<br /> free -m<br /> swapon --show<br /> <br /> Add filesystem swap:<br /> swapoff -a<br /> dd if=/dev/zero of=/swapfile bs=1M count=1024<br /> chmod 600 /swapfile<br /> mkswap /swapfile<br /> swapon /swapfile<br /> <br /> Add to /etc/fstab:<br /> /swapfile none swap sw 0 0<br /> <br /> To see current zram configuration:<br /> zramctl <br /> zramctl --output-all /dev/zram0<br /> <br /> To resize:<br /> swapoff /dev/zram0<br /> zramctl --reset /dev/zram0<br /> zramctl --find --size 512M<br /> mkswap /dev/zram0<br /> swapon /dev/zram0<br /> <br /> === Temperature ===<br /> <br /> echo &quot;scale=2; $(cat /sys/class/thermal/thermal_zone0/temp) / 1000&quot; | bc<br /> <br /> CPU Core throttling above 80 C.</div>

NickPGSmith https://www.smithnet.org.uk/wiki/index.php?title=Rasberry_Pi&diff=1726 2026-05-27T15:25:14Z

<p>NickPGSmith: /* GPIO */</p> <hr /> <div>== Device ==<br /> <br /> * [https://www.raspberrypi.com/documentation/computers/raspberry-pi.html#raspberry-pi-3-model-b Rasberry Pi 3B] (&quot;Rev 1.2&quot;)<br /> <br /> cat /proc/device-tree/model<br /> <br /> AV Connector:<br /> * 1 (tip): L Audio<br /> * 2: R Audio<br /> * 3: Ground<br /> * Sleeve: Composite Video.<br /> <br /> * [https://www.raspberrypi.com/documentation/computers/raspberry-pi.html#gpio-and-the-40-pin-header GPIO]<br /> <br /> == Rasbery Pi OS ==<br /> <br /> See [https://www.raspberrypi.com/documentation/computers/config_txt.html /boot/firmware/config.txt].<br /> <br /> Command line configuration program:<br /> raspi-config<br /> <br /> Upgrade:<br /> apt update &amp;&amp; sudo apt upgrade -y<br /> <br /> === Apache Web Server ===<br /> <br /> apt install apache2 -y<br /> <br /> * Configuration: /etc/apache2<br /> * Serve from: /var/www/html<br /> <br /> === Composite Video ===<br /> <br /> In /boot/firmware/config.txt:<br /> enable_tvout=1<br /> dtoverlay=vc4-kms-v3d,composite<br /> <br /> Ensure hdmi_force_hotplug=1 is commented out or set to 0.<br /> <br /> In /boot/firmware/cmdline.txt, either:<br /> vc4.tv_norm=PAL<br /> vc4.tv_norm=NTSC<br /> <br /> To control overscan, see settings:<br /> margin_left<br /> margin_right<br /> <br /> === Go Development ===<br /> <br /> Because of limited RAM, best to cross compile on a more powerful system:<br /> CGO_ENABLED=0 GOOS=linux GOARCH=arm GOARM=7 go build myprog.go<br /> <br /> === GPIO Development ===<br /> <br /> Raspberry Pi OS use the newer gpiod subsystem (which interacts with /dev/gpiochip).<br /> <br /> In Python, use:<br /> apt install python3-gpiozero -y<br /> <br /> In Go, use: periph.io<br /> <br /> === Mail ===<br /> <br /> MUA:<br /> apt install bsd-mailx<br /> apt install mutt<br /> <br /> Mail spool directory (eg NFS mount from server):<br /> /var/mail<br /> <br /> Exim is the default MTA:<br /> dpkg-reconfigure exim4-config<br /> update-exim4.conf<br /> systemctl restart exim4<br /> <br /> Monitor logs:<br /> tail -f /var/log/exim4/mainlog<br /> <br /> === NFS Automounter ===<br /> <br /> apt install autofs nfs-common -y<br /> <br /> Edit /etc/auto.master and enable the host map:<br /> /net -hosts --timeout=60<br /> <br /> systemctl enable autofs<br /> systemctl restart autofs<br /> <br /> === NTP Client ===<br /> <br /> apt install systemd-timesyncd -y<br /> <br /> Edit /etc/systemd/timesyncd.conf and set NTP parameter<br /> systemctl restart systemd-timesyncd<br /> timedatectl status<br /> timedatectl timesync-status<br /> <br /> === Swap ===<br /> free -m<br /> swapon --show<br /> <br /> Add filesystem swap:<br /> swapoff -a<br /> dd if=/dev/zero of=/swapfile bs=1M count=1024<br /> chmod 600 /swapfile<br /> mkswap /swapfile<br /> swapon /swapfile<br /> <br /> Add to /etc/fstab:<br /> /swapfile none swap sw 0 0<br /> <br /> To see current zram configuration:<br /> zramctl <br /> zramctl --output-all /dev/zram0<br /> <br /> To resize:<br /> swapoff /dev/zram0<br /> zramctl --reset /dev/zram0<br /> zramctl --find --size 512M<br /> mkswap /dev/zram0<br /> swapon /dev/zram0<br /> <br /> === Temperature ===<br /> <br /> echo &quot;scale=2; $(cat /sys/class/thermal/thermal_zone0/temp) / 1000&quot; | bc<br /> <br /> CPU Core throttling above 80 C.</div>

NickPGSmith https://www.smithnet.org.uk/wiki/index.php?title=Rasberry_Pi&diff=1725 2026-05-27T15:23:36Z

<p>NickPGSmith: /* Device */</p> <hr /> <div>== Device ==<br /> <br /> * [https://www.raspberrypi.com/documentation/computers/raspberry-pi.html#raspberry-pi-3-model-b Rasberry Pi 3B] (&quot;Rev 1.2&quot;)<br /> <br /> cat /proc/device-tree/model<br /> <br /> AV Connector:<br /> * 1 (tip): L Audio<br /> * 2: R Audio<br /> * 3: Ground<br /> * Sleeve: Composite Video.<br /> <br /> * [https://www.raspberrypi.com/documentation/computers/raspberry-pi.html#gpio-and-the-40-pin-header GPIO]<br /> <br /> == Rasbery Pi OS ==<br /> <br /> See [https://www.raspberrypi.com/documentation/computers/config_txt.html /boot/firmware/config.txt].<br /> <br /> Command line configuration program:<br /> raspi-config<br /> <br /> Upgrade:<br /> apt update &amp;&amp; sudo apt upgrade -y<br /> <br /> == GPIO ==<br /> <br /> Raspberry Pi OS versions use the newer gpiod subsystem (which interacts with /dev/gpiochip)<br /> <br /> python:<br /> apt install python3-gpiozero -y<br /> <br /> go: periph.io<br /> <br /> <br /> === Apache Web Server ===<br /> <br /> apt install apache2 -y<br /> <br /> * Configuration: /etc/apache2<br /> * Serve from: /var/www/html<br /> <br /> === Composite Video ===<br /> <br /> In /boot/firmware/config.txt:<br /> enable_tvout=1<br /> dtoverlay=vc4-kms-v3d,composite<br /> <br /> Ensure hdmi_force_hotplug=1 is commented out or set to 0.<br /> <br /> In /boot/firmware/cmdline.txt, either:<br /> vc4.tv_norm=PAL<br /> vc4.tv_norm=NTSC<br /> <br /> To control overscan, see settings:<br /> margin_left<br /> margin_right<br /> <br /> === Go Development ===<br /> <br /> Because of limited RAM, best to cross compile on a more powerful system:<br /> CGO_ENABLED=0 GOOS=linux GOARCH=arm GOARM=7 go build myprog.go<br /> <br /> === Mail ===<br /> <br /> MUA:<br /> apt install bsd-mailx<br /> apt install mutt<br /> <br /> Mail spool directory (eg NFS mount from server):<br /> /var/mail<br /> <br /> Exim is the default MTA:<br /> dpkg-reconfigure exim4-config<br /> update-exim4.conf<br /> systemctl restart exim4<br /> <br /> Monitor logs:<br /> tail -f /var/log/exim4/mainlog<br /> <br /> === NFS Automounter ===<br /> <br /> apt install autofs nfs-common -y<br /> <br /> Edit /etc/auto.master and enable the host map:<br /> /net -hosts --timeout=60<br /> <br /> systemctl enable autofs<br /> systemctl restart autofs<br /> <br /> === NTP Client ===<br /> <br /> apt install systemd-timesyncd -y<br /> <br /> Edit /etc/systemd/timesyncd.conf and set NTP parameter<br /> systemctl restart systemd-timesyncd<br /> timedatectl status<br /> timedatectl timesync-status<br /> <br /> === Swap ===<br /> free -m<br /> swapon --show<br /> <br /> Add filesystem swap:<br /> swapoff -a<br /> dd if=/dev/zero of=/swapfile bs=1M count=1024<br /> chmod 600 /swapfile<br /> mkswap /swapfile<br /> swapon /swapfile<br /> <br /> Add to /etc/fstab:<br /> /swapfile none swap sw 0 0<br /> <br /> To see current zram configuration:<br /> zramctl <br /> zramctl --output-all /dev/zram0<br /> <br /> To resize:<br /> swapoff /dev/zram0<br /> zramctl --reset /dev/zram0<br /> zramctl --find --size 512M<br /> mkswap /dev/zram0<br /> swapon /dev/zram0<br /> <br /> === Temperature ===<br /> <br /> echo &quot;scale=2; $(cat /sys/class/thermal/thermal_zone0/temp) / 1000&quot; | bc<br /> <br /> CPU Core throttling above 80 C.</div>

NickPGSmith https://www.smithnet.org.uk/wiki/index.php?title=Rasberry_Pi&diff=1724 2026-05-27T15:23:20Z

<p>NickPGSmith: /* Device */</p> <hr /> <div>== Device ==<br /> <br /> * [https://www.raspberrypi.com/documentation/computers/raspberry-pi.html#raspberry-pi-3-model-b Rasberry Pi 3B] (&quot;Rev 1.2&quot;)<br /> <br /> cat /proc/device-tree/model<br /> <br /> AV Connector:<br /> * 1 (tip): L Audio<br /> * 2: R Audio<br /> * 3L Ground<br /> * Sleve: Composite Video.<br /> <br /> * [https://www.raspberrypi.com/documentation/computers/raspberry-pi.html#gpio-and-the-40-pin-header GPIO]<br /> <br /> == Rasbery Pi OS ==<br /> <br /> See [https://www.raspberrypi.com/documentation/computers/config_txt.html /boot/firmware/config.txt].<br /> <br /> Command line configuration program:<br /> raspi-config<br /> <br /> Upgrade:<br /> apt update &amp;&amp; sudo apt upgrade -y<br /> <br /> == GPIO ==<br /> <br /> Raspberry Pi OS versions use the newer gpiod subsystem (which interacts with /dev/gpiochip)<br /> <br /> python:<br /> apt install python3-gpiozero -y<br /> <br /> go: periph.io<br /> <br /> <br /> === Apache Web Server ===<br /> <br /> apt install apache2 -y<br /> <br /> * Configuration: /etc/apache2<br /> * Serve from: /var/www/html<br /> <br /> === Composite Video ===<br /> <br /> In /boot/firmware/config.txt:<br /> enable_tvout=1<br /> dtoverlay=vc4-kms-v3d,composite<br /> <br /> Ensure hdmi_force_hotplug=1 is commented out or set to 0.<br /> <br /> In /boot/firmware/cmdline.txt, either:<br /> vc4.tv_norm=PAL<br /> vc4.tv_norm=NTSC<br /> <br /> To control overscan, see settings:<br /> margin_left<br /> margin_right<br /> <br /> === Go Development ===<br /> <br /> Because of limited RAM, best to cross compile on a more powerful system:<br /> CGO_ENABLED=0 GOOS=linux GOARCH=arm GOARM=7 go build myprog.go<br /> <br /> === Mail ===<br /> <br /> MUA:<br /> apt install bsd-mailx<br /> apt install mutt<br /> <br /> Mail spool directory (eg NFS mount from server):<br /> /var/mail<br /> <br /> Exim is the default MTA:<br /> dpkg-reconfigure exim4-config<br /> update-exim4.conf<br /> systemctl restart exim4<br /> <br /> Monitor logs:<br /> tail -f /var/log/exim4/mainlog<br /> <br /> === NFS Automounter ===<br /> <br /> apt install autofs nfs-common -y<br /> <br /> Edit /etc/auto.master and enable the host map:<br /> /net -hosts --timeout=60<br /> <br /> systemctl enable autofs<br /> systemctl restart autofs<br /> <br /> === NTP Client ===<br /> <br /> apt install systemd-timesyncd -y<br /> <br /> Edit /etc/systemd/timesyncd.conf and set NTP parameter<br /> systemctl restart systemd-timesyncd<br /> timedatectl status<br /> timedatectl timesync-status<br /> <br /> === Swap ===<br /> free -m<br /> swapon --show<br /> <br /> Add filesystem swap:<br /> swapoff -a<br /> dd if=/dev/zero of=/swapfile bs=1M count=1024<br /> chmod 600 /swapfile<br /> mkswap /swapfile<br /> swapon /swapfile<br /> <br /> Add to /etc/fstab:<br /> /swapfile none swap sw 0 0<br /> <br /> To see current zram configuration:<br /> zramctl <br /> zramctl --output-all /dev/zram0<br /> <br /> To resize:<br /> swapoff /dev/zram0<br /> zramctl --reset /dev/zram0<br /> zramctl --find --size 512M<br /> mkswap /dev/zram0<br /> swapon /dev/zram0<br /> <br /> === Temperature ===<br /> <br /> echo &quot;scale=2; $(cat /sys/class/thermal/thermal_zone0/temp) / 1000&quot; | bc<br /> <br /> CPU Core throttling above 80 C.</div>

NickPGSmith https://www.smithnet.org.uk/wiki/index.php?title=Rasberry_Pi&diff=1723 2026-05-27T15:21:30Z

<p>NickPGSmith: /* Composite Video */</p> <hr /> <div>== Device ==<br /> <br /> * [https://www.raspberrypi.com/documentation/computers/raspberry-pi.html#raspberry-pi-3-model-b Rasberry Pi 3B] (&quot;Rev 1.2&quot;)<br /> <br /> cat /proc/device-tree/model<br /> <br /> * [https://www.raspberrypi.com/documentation/computers/raspberry-pi.html#gpio-and-the-40-pin-header GPIO]<br /> <br /> == Rasbery Pi OS ==<br /> <br /> See [https://www.raspberrypi.com/documentation/computers/config_txt.html /boot/firmware/config.txt].<br /> <br /> Command line configuration program:<br /> raspi-config<br /> <br /> Upgrade:<br /> apt update &amp;&amp; sudo apt upgrade -y<br /> <br /> == GPIO ==<br /> <br /> Raspberry Pi OS versions use the newer gpiod subsystem (which interacts with /dev/gpiochip)<br /> <br /> python:<br /> apt install python3-gpiozero -y<br /> <br /> go: periph.io<br /> <br /> <br /> === Apache Web Server ===<br /> <br /> apt install apache2 -y<br /> <br /> * Configuration: /etc/apache2<br /> * Serve from: /var/www/html<br /> <br /> === Composite Video ===<br /> <br /> In /boot/firmware/config.txt:<br /> enable_tvout=1<br /> dtoverlay=vc4-kms-v3d,composite<br /> <br /> Ensure hdmi_force_hotplug=1 is commented out or set to 0.<br /> <br /> In /boot/firmware/cmdline.txt, either:<br /> vc4.tv_norm=PAL<br /> vc4.tv_norm=NTSC<br /> <br /> To control overscan, see settings:<br /> margin_left<br /> margin_right<br /> <br /> === Go Development ===<br /> <br /> Because of limited RAM, best to cross compile on a more powerful system:<br /> CGO_ENABLED=0 GOOS=linux GOARCH=arm GOARM=7 go build myprog.go<br /> <br /> === Mail ===<br /> <br /> MUA:<br /> apt install bsd-mailx<br /> apt install mutt<br /> <br /> Mail spool directory (eg NFS mount from server):<br /> /var/mail<br /> <br /> Exim is the default MTA:<br /> dpkg-reconfigure exim4-config<br /> update-exim4.conf<br /> systemctl restart exim4<br /> <br /> Monitor logs:<br /> tail -f /var/log/exim4/mainlog<br /> <br /> === NFS Automounter ===<br /> <br /> apt install autofs nfs-common -y<br /> <br /> Edit /etc/auto.master and enable the host map:<br /> /net -hosts --timeout=60<br /> <br /> systemctl enable autofs<br /> systemctl restart autofs<br /> <br /> === NTP Client ===<br /> <br /> apt install systemd-timesyncd -y<br /> <br /> Edit /etc/systemd/timesyncd.conf and set NTP parameter<br /> systemctl restart systemd-timesyncd<br /> timedatectl status<br /> timedatectl timesync-status<br /> <br /> === Swap ===<br /> free -m<br /> swapon --show<br /> <br /> Add filesystem swap:<br /> swapoff -a<br /> dd if=/dev/zero of=/swapfile bs=1M count=1024<br /> chmod 600 /swapfile<br /> mkswap /swapfile<br /> swapon /swapfile<br /> <br /> Add to /etc/fstab:<br /> /swapfile none swap sw 0 0<br /> <br /> To see current zram configuration:<br /> zramctl <br /> zramctl --output-all /dev/zram0<br /> <br /> To resize:<br /> swapoff /dev/zram0<br /> zramctl --reset /dev/zram0<br /> zramctl --find --size 512M<br /> mkswap /dev/zram0<br /> swapon /dev/zram0<br /> <br /> === Temperature ===<br /> <br /> echo &quot;scale=2; $(cat /sys/class/thermal/thermal_zone0/temp) / 1000&quot; | bc<br /> <br /> CPU Core throttling above 80 C.</div>

NickPGSmith https://www.smithnet.org.uk/wiki/index.php?title=Rasberry_Pi&diff=1722 2026-05-27T15:20:25Z

<p>NickPGSmith: /* Mail */</p> <hr /> <div>== Device ==<br /> <br /> * [https://www.raspberrypi.com/documentation/computers/raspberry-pi.html#raspberry-pi-3-model-b Rasberry Pi 3B] (&quot;Rev 1.2&quot;)<br /> <br /> cat /proc/device-tree/model<br /> <br /> * [https://www.raspberrypi.com/documentation/computers/raspberry-pi.html#gpio-and-the-40-pin-header GPIO]<br /> <br /> == Rasbery Pi OS ==<br /> <br /> See [https://www.raspberrypi.com/documentation/computers/config_txt.html /boot/firmware/config.txt].<br /> <br /> Command line configuration program:<br /> raspi-config<br /> <br /> Upgrade:<br /> apt update &amp;&amp; sudo apt upgrade -y<br /> <br /> == GPIO ==<br /> <br /> Raspberry Pi OS versions use the newer gpiod subsystem (which interacts with /dev/gpiochip)<br /> <br /> python:<br /> apt install python3-gpiozero -y<br /> <br /> go: periph.io<br /> <br /> <br /> === Apache Web Server ===<br /> <br /> apt install apache2 -y<br /> <br /> * Configuration: /etc/apache2<br /> * Serve from: /var/www/html<br /> <br /> === Composite Video ===<br /> <br /> Note: CVBS is on sleve; Gnd is ring 3. It is enabled when no HDMI monitor is connected.<br /> <br /> In /boot/firmware/config.txt:<br /> enable_tvout=1<br /> dtoverlay=vc4-kms-v3d,composite<br /> <br /> Ensure hdmi_force_hotplug=1 is commented out or set to 0.<br /> <br /> In /boot/firmware/cmdline.txt, either:<br /> vc4.tv_norm=PAL<br /> vc4.tv_norm=NTSC<br /> <br /> To control overscan, see settings:<br /> margin_left<br /> margin_right<br /> <br /> === Go Development ===<br /> <br /> Because of limited RAM, best to cross compile on a more powerful system:<br /> CGO_ENABLED=0 GOOS=linux GOARCH=arm GOARM=7 go build myprog.go<br /> <br /> === Mail ===<br /> <br /> MUA:<br /> apt install bsd-mailx<br /> apt install mutt<br /> <br /> Mail spool directory (eg NFS mount from server):<br /> /var/mail<br /> <br /> Exim is the default MTA:<br /> dpkg-reconfigure exim4-config<br /> update-exim4.conf<br /> systemctl restart exim4<br /> <br /> Monitor logs:<br /> tail -f /var/log/exim4/mainlog<br /> <br /> === NFS Automounter ===<br /> <br /> apt install autofs nfs-common -y<br /> <br /> Edit /etc/auto.master and enable the host map:<br /> /net -hosts --timeout=60<br /> <br /> systemctl enable autofs<br /> systemctl restart autofs<br /> <br /> === NTP Client ===<br /> <br /> apt install systemd-timesyncd -y<br /> <br /> Edit /etc/systemd/timesyncd.conf and set NTP parameter<br /> systemctl restart systemd-timesyncd<br /> timedatectl status<br /> timedatectl timesync-status<br /> <br /> === Swap ===<br /> free -m<br /> swapon --show<br /> <br /> Add filesystem swap:<br /> swapoff -a<br /> dd if=/dev/zero of=/swapfile bs=1M count=1024<br /> chmod 600 /swapfile<br /> mkswap /swapfile<br /> swapon /swapfile<br /> <br /> Add to /etc/fstab:<br /> /swapfile none swap sw 0 0<br /> <br /> To see current zram configuration:<br /> zramctl <br /> zramctl --output-all /dev/zram0<br /> <br /> To resize:<br /> swapoff /dev/zram0<br /> zramctl --reset /dev/zram0<br /> zramctl --find --size 512M<br /> mkswap /dev/zram0<br /> swapon /dev/zram0<br /> <br /> === Temperature ===<br /> <br /> echo &quot;scale=2; $(cat /sys/class/thermal/thermal_zone0/temp) / 1000&quot; | bc<br /> <br /> CPU Core throttling above 80 C.</div>

NickPGSmith https://www.smithnet.org.uk/wiki/index.php?title=Rasberry_Pi&diff=1721 2026-05-27T15:19:54Z

<p>NickPGSmith: /* Apache Web Server */</p> <hr /> <div>== Device ==<br /> <br /> * [https://www.raspberrypi.com/documentation/computers/raspberry-pi.html#raspberry-pi-3-model-b Rasberry Pi 3B] (&quot;Rev 1.2&quot;)<br /> <br /> cat /proc/device-tree/model<br /> <br /> * [https://www.raspberrypi.com/documentation/computers/raspberry-pi.html#gpio-and-the-40-pin-header GPIO]<br /> <br /> == Rasbery Pi OS ==<br /> <br /> See [https://www.raspberrypi.com/documentation/computers/config_txt.html /boot/firmware/config.txt].<br /> <br /> Command line configuration program:<br /> raspi-config<br /> <br /> Upgrade:<br /> apt update &amp;&amp; sudo apt upgrade -y<br /> <br /> == GPIO ==<br /> <br /> Raspberry Pi OS versions use the newer gpiod subsystem (which interacts with /dev/gpiochip)<br /> <br /> python:<br /> apt install python3-gpiozero -y<br /> <br /> go: periph.io<br /> <br /> <br /> === Apache Web Server ===<br /> <br /> apt install apache2 -y<br /> <br /> * Configuration: /etc/apache2<br /> * Serve from: /var/www/html<br /> <br /> === Composite Video ===<br /> <br /> Note: CVBS is on sleve; Gnd is ring 3. It is enabled when no HDMI monitor is connected.<br /> <br /> In /boot/firmware/config.txt:<br /> enable_tvout=1<br /> dtoverlay=vc4-kms-v3d,composite<br /> <br /> Ensure hdmi_force_hotplug=1 is commented out or set to 0.<br /> <br /> In /boot/firmware/cmdline.txt, either:<br /> vc4.tv_norm=PAL<br /> vc4.tv_norm=NTSC<br /> <br /> To control overscan, see settings:<br /> margin_left<br /> margin_right<br /> <br /> === Go Development ===<br /> <br /> Because of limited RAM, best to cross compile on a more powerful system:<br /> CGO_ENABLED=0 GOOS=linux GOARCH=arm GOARM=7 go build myprog.go<br /> <br /> === Mail ===<br /> <br /> MUA:<br /> apt install bsd-mailx<br /> apt install mutt<br /> <br /> Mail spool directory (eg NFS mount from server):<br /> /var/mail<br /> <br /> Exim is the default MTA:<br /> dpkg-reconfigure exim4-config<br /> update-exim4.conf<br /> systemctl restart exim4<br /> <br /> Monitor logs:<br /> /var/log/exim4/mainlog<br /> <br /> === NFS Automounter ===<br /> <br /> apt install autofs nfs-common -y<br /> <br /> Edit /etc/auto.master and enable the host map:<br /> /net -hosts --timeout=60<br /> <br /> systemctl enable autofs<br /> systemctl restart autofs<br /> <br /> === NTP Client ===<br /> <br /> apt install systemd-timesyncd -y<br /> <br /> Edit /etc/systemd/timesyncd.conf and set NTP parameter<br /> systemctl restart systemd-timesyncd<br /> timedatectl status<br /> timedatectl timesync-status<br /> <br /> === Swap ===<br /> free -m<br /> swapon --show<br /> <br /> Add filesystem swap:<br /> swapoff -a<br /> dd if=/dev/zero of=/swapfile bs=1M count=1024<br /> chmod 600 /swapfile<br /> mkswap /swapfile<br /> swapon /swapfile<br /> <br /> Add to /etc/fstab:<br /> /swapfile none swap sw 0 0<br /> <br /> To see current zram configuration:<br /> zramctl <br /> zramctl --output-all /dev/zram0<br /> <br /> To resize:<br /> swapoff /dev/zram0<br /> zramctl --reset /dev/zram0<br /> zramctl --find --size 512M<br /> mkswap /dev/zram0<br /> swapon /dev/zram0<br /> <br /> === Temperature ===<br /> <br /> echo &quot;scale=2; $(cat /sys/class/thermal/thermal_zone0/temp) / 1000&quot; | bc<br /> <br /> CPU Core throttling above 80 C.</div>

NickPGSmith https://www.smithnet.org.uk/wiki/index.php?title=Rasberry_Pi&diff=1720 2026-05-27T15:19:40Z

<p>NickPGSmith: /* Apache Web Server */</p> <hr /> <div>== Device ==<br /> <br /> * [https://www.raspberrypi.com/documentation/computers/raspberry-pi.html#raspberry-pi-3-model-b Rasberry Pi 3B] (&quot;Rev 1.2&quot;)<br /> <br /> cat /proc/device-tree/model<br /> <br /> * [https://www.raspberrypi.com/documentation/computers/raspberry-pi.html#gpio-and-the-40-pin-header GPIO]<br /> <br /> == Rasbery Pi OS ==<br /> <br /> See [https://www.raspberrypi.com/documentation/computers/config_txt.html /boot/firmware/config.txt].<br /> <br /> Command line configuration program:<br /> raspi-config<br /> <br /> Upgrade:<br /> apt update &amp;&amp; sudo apt upgrade -y<br /> <br /> == GPIO ==<br /> <br /> Raspberry Pi OS versions use the newer gpiod subsystem (which interacts with /dev/gpiochip)<br /> <br /> python:<br /> apt install python3-gpiozero -y<br /> <br /> go: periph.io<br /> <br /> <br /> === Apache Web Server ===<br /> <br /> apt install apache2<br /> <br /> * Configuration: /etc/apache2 -y<br /> * Serve from: /var/www/html<br /> <br /> === Composite Video ===<br /> <br /> Note: CVBS is on sleve; Gnd is ring 3. It is enabled when no HDMI monitor is connected.<br /> <br /> In /boot/firmware/config.txt:<br /> enable_tvout=1<br /> dtoverlay=vc4-kms-v3d,composite<br /> <br /> Ensure hdmi_force_hotplug=1 is commented out or set to 0.<br /> <br /> In /boot/firmware/cmdline.txt, either:<br /> vc4.tv_norm=PAL<br /> vc4.tv_norm=NTSC<br /> <br /> To control overscan, see settings:<br /> margin_left<br /> margin_right<br /> <br /> === Go Development ===<br /> <br /> Because of limited RAM, best to cross compile on a more powerful system:<br /> CGO_ENABLED=0 GOOS=linux GOARCH=arm GOARM=7 go build myprog.go<br /> <br /> === Mail ===<br /> <br /> MUA:<br /> apt install bsd-mailx<br /> apt install mutt<br /> <br /> Mail spool directory (eg NFS mount from server):<br /> /var/mail<br /> <br /> Exim is the default MTA:<br /> dpkg-reconfigure exim4-config<br /> update-exim4.conf<br /> systemctl restart exim4<br /> <br /> Monitor logs:<br /> /var/log/exim4/mainlog<br /> <br /> === NFS Automounter ===<br /> <br /> apt install autofs nfs-common -y<br /> <br /> Edit /etc/auto.master and enable the host map:<br /> /net -hosts --timeout=60<br /> <br /> systemctl enable autofs<br /> systemctl restart autofs<br /> <br /> === NTP Client ===<br /> <br /> apt install systemd-timesyncd -y<br /> <br /> Edit /etc/systemd/timesyncd.conf and set NTP parameter<br /> systemctl restart systemd-timesyncd<br /> timedatectl status<br /> timedatectl timesync-status<br /> <br /> === Swap ===<br /> free -m<br /> swapon --show<br /> <br /> Add filesystem swap:<br /> swapoff -a<br /> dd if=/dev/zero of=/swapfile bs=1M count=1024<br /> chmod 600 /swapfile<br /> mkswap /swapfile<br /> swapon /swapfile<br /> <br /> Add to /etc/fstab:<br /> /swapfile none swap sw 0 0<br /> <br /> To see current zram configuration:<br /> zramctl <br /> zramctl --output-all /dev/zram0<br /> <br /> To resize:<br /> swapoff /dev/zram0<br /> zramctl --reset /dev/zram0<br /> zramctl --find --size 512M<br /> mkswap /dev/zram0<br /> swapon /dev/zram0<br /> <br /> === Temperature ===<br /> <br /> echo &quot;scale=2; $(cat /sys/class/thermal/thermal_zone0/temp) / 1000&quot; | bc<br /> <br /> CPU Core throttling above 80 C.</div>

NickPGSmith https://www.smithnet.org.uk/wiki/index.php?title=Rasberry_Pi&diff=1719 2026-05-27T15:15:39Z

<p>NickPGSmith: /* Temperature */</p> <hr /> <div>== Device ==<br /> <br /> * [https://www.raspberrypi.com/documentation/computers/raspberry-pi.html#raspberry-pi-3-model-b Rasberry Pi 3B] (&quot;Rev 1.2&quot;)<br /> <br /> cat /proc/device-tree/model<br /> <br /> * [https://www.raspberrypi.com/documentation/computers/raspberry-pi.html#gpio-and-the-40-pin-header GPIO]<br /> <br /> == Rasbery Pi OS ==<br /> <br /> See [https://www.raspberrypi.com/documentation/computers/config_txt.html /boot/firmware/config.txt].<br /> <br /> Command line configuration program:<br /> raspi-config<br /> <br /> Upgrade:<br /> apt update &amp;&amp; sudo apt upgrade -y<br /> <br /> == GPIO ==<br /> <br /> Raspberry Pi OS versions use the newer gpiod subsystem (which interacts with /dev/gpiochip)<br /> <br /> python:<br /> apt install python3-gpiozero -y<br /> <br /> go: periph.io<br /> <br /> <br /> === Apache Web Server ===<br /> <br /> apt install apache2<br /> <br /> * Configuration: /etc/apache2<br /> * Serve from: /var/www/html<br /> <br /> === Composite Video ===<br /> <br /> Note: CVBS is on sleve; Gnd is ring 3. It is enabled when no HDMI monitor is connected.<br /> <br /> In /boot/firmware/config.txt:<br /> enable_tvout=1<br /> dtoverlay=vc4-kms-v3d,composite<br /> <br /> Ensure hdmi_force_hotplug=1 is commented out or set to 0.<br /> <br /> In /boot/firmware/cmdline.txt, either:<br /> vc4.tv_norm=PAL<br /> vc4.tv_norm=NTSC<br /> <br /> To control overscan, see settings:<br /> margin_left<br /> margin_right<br /> <br /> === Go Development ===<br /> <br /> Because of limited RAM, best to cross compile on a more powerful system:<br /> CGO_ENABLED=0 GOOS=linux GOARCH=arm GOARM=7 go build myprog.go<br /> <br /> === Mail ===<br /> <br /> MUA:<br /> apt install bsd-mailx<br /> apt install mutt<br /> <br /> Mail spool directory (eg NFS mount from server):<br /> /var/mail<br /> <br /> Exim is the default MTA:<br /> dpkg-reconfigure exim4-config<br /> update-exim4.conf<br /> systemctl restart exim4<br /> <br /> Monitor logs:<br /> /var/log/exim4/mainlog<br /> <br /> === NFS Automounter ===<br /> <br /> apt install autofs nfs-common -y<br /> <br /> Edit /etc/auto.master and enable the host map:<br /> /net -hosts --timeout=60<br /> <br /> systemctl enable autofs<br /> systemctl restart autofs<br /> <br /> === NTP Client ===<br /> <br /> apt install systemd-timesyncd -y<br /> <br /> Edit /etc/systemd/timesyncd.conf and set NTP parameter<br /> systemctl restart systemd-timesyncd<br /> timedatectl status<br /> timedatectl timesync-status<br /> <br /> === Swap ===<br /> free -m<br /> swapon --show<br /> <br /> Add filesystem swap:<br /> swapoff -a<br /> dd if=/dev/zero of=/swapfile bs=1M count=1024<br /> chmod 600 /swapfile<br /> mkswap /swapfile<br /> swapon /swapfile<br /> <br /> Add to /etc/fstab:<br /> /swapfile none swap sw 0 0<br /> <br /> To see current zram configuration:<br /> zramctl <br /> zramctl --output-all /dev/zram0<br /> <br /> To resize:<br /> swapoff /dev/zram0<br /> zramctl --reset /dev/zram0<br /> zramctl --find --size 512M<br /> mkswap /dev/zram0<br /> swapon /dev/zram0<br /> <br /> === Temperature ===<br /> <br /> echo &quot;scale=2; $(cat /sys/class/thermal/thermal_zone0/temp) / 1000&quot; | bc<br /> <br /> CPU Core throttling above 80 C.</div>

NickPGSmith https://www.smithnet.org.uk/wiki/index.php?title=Rasberry_Pi&diff=1718 2026-05-27T15:15:26Z

<p>NickPGSmith: /* Swap */</p> <hr /> <div>== Device ==<br /> <br /> * [https://www.raspberrypi.com/documentation/computers/raspberry-pi.html#raspberry-pi-3-model-b Rasberry Pi 3B] (&quot;Rev 1.2&quot;)<br /> <br /> cat /proc/device-tree/model<br /> <br /> * [https://www.raspberrypi.com/documentation/computers/raspberry-pi.html#gpio-and-the-40-pin-header GPIO]<br /> <br /> == Rasbery Pi OS ==<br /> <br /> See [https://www.raspberrypi.com/documentation/computers/config_txt.html /boot/firmware/config.txt].<br /> <br /> Command line configuration program:<br /> raspi-config<br /> <br /> Upgrade:<br /> apt update &amp;&amp; sudo apt upgrade -y<br /> <br /> == GPIO ==<br /> <br /> Raspberry Pi OS versions use the newer gpiod subsystem (which interacts with /dev/gpiochip)<br /> <br /> python:<br /> apt install python3-gpiozero -y<br /> <br /> go: periph.io<br /> <br /> <br /> === Apache Web Server ===<br /> <br /> apt install apache2<br /> <br /> * Configuration: /etc/apache2<br /> * Serve from: /var/www/html<br /> <br /> === Composite Video ===<br /> <br /> Note: CVBS is on sleve; Gnd is ring 3. It is enabled when no HDMI monitor is connected.<br /> <br /> In /boot/firmware/config.txt:<br /> enable_tvout=1<br /> dtoverlay=vc4-kms-v3d,composite<br /> <br /> Ensure hdmi_force_hotplug=1 is commented out or set to 0.<br /> <br /> In /boot/firmware/cmdline.txt, either:<br /> vc4.tv_norm=PAL<br /> vc4.tv_norm=NTSC<br /> <br /> To control overscan, see settings:<br /> margin_left<br /> margin_right<br /> <br /> === Go Development ===<br /> <br /> Because of limited RAM, best to cross compile on a more powerful system:<br /> CGO_ENABLED=0 GOOS=linux GOARCH=arm GOARM=7 go build myprog.go<br /> <br /> === Mail ===<br /> <br /> MUA:<br /> apt install bsd-mailx<br /> apt install mutt<br /> <br /> Mail spool directory (eg NFS mount from server):<br /> /var/mail<br /> <br /> Exim is the default MTA:<br /> dpkg-reconfigure exim4-config<br /> update-exim4.conf<br /> systemctl restart exim4<br /> <br /> Monitor logs:<br /> /var/log/exim4/mainlog<br /> <br /> === NFS Automounter ===<br /> <br /> apt install autofs nfs-common -y<br /> <br /> Edit /etc/auto.master and enable the host map:<br /> /net -hosts --timeout=60<br /> <br /> systemctl enable autofs<br /> systemctl restart autofs<br /> <br /> === NTP Client ===<br /> <br /> apt install systemd-timesyncd -y<br /> <br /> Edit /etc/systemd/timesyncd.conf and set NTP parameter<br /> systemctl restart systemd-timesyncd<br /> timedatectl status<br /> timedatectl timesync-status<br /> <br /> === Temperature ===<br /> <br /> echo &quot;scale=2; $(cat /sys/class/thermal/thermal_zone0/temp) / 1000&quot; | bc<br /> <br /> CPU Core throttling above 80 C.</div>

NickPGSmith https://www.smithnet.org.uk/wiki/index.php?title=Rasberry_Pi&diff=1717 2026-05-27T15:14:55Z

<p>NickPGSmith: /* Mail */</p> <hr /> <div>== Device ==<br /> <br /> * [https://www.raspberrypi.com/documentation/computers/raspberry-pi.html#raspberry-pi-3-model-b Rasberry Pi 3B] (&quot;Rev 1.2&quot;)<br /> <br /> cat /proc/device-tree/model<br /> <br /> * [https://www.raspberrypi.com/documentation/computers/raspberry-pi.html#gpio-and-the-40-pin-header GPIO]<br /> <br /> == Rasbery Pi OS ==<br /> <br /> See [https://www.raspberrypi.com/documentation/computers/config_txt.html /boot/firmware/config.txt].<br /> <br /> Command line configuration program:<br /> raspi-config<br /> <br /> Upgrade:<br /> apt update &amp;&amp; sudo apt upgrade -y<br /> <br /> == GPIO ==<br /> <br /> Raspberry Pi OS versions use the newer gpiod subsystem (which interacts with /dev/gpiochip)<br /> <br /> python:<br /> apt install python3-gpiozero -y<br /> <br /> go: periph.io<br /> <br /> <br /> === Apache Web Server ===<br /> <br /> apt install apache2<br /> <br /> * Configuration: /etc/apache2<br /> * Serve from: /var/www/html<br /> <br /> === Composite Video ===<br /> <br /> Note: CVBS is on sleve; Gnd is ring 3. It is enabled when no HDMI monitor is connected.<br /> <br /> In /boot/firmware/config.txt:<br /> enable_tvout=1<br /> dtoverlay=vc4-kms-v3d,composite<br /> <br /> Ensure hdmi_force_hotplug=1 is commented out or set to 0.<br /> <br /> In /boot/firmware/cmdline.txt, either:<br /> vc4.tv_norm=PAL<br /> vc4.tv_norm=NTSC<br /> <br /> To control overscan, see settings:<br /> margin_left<br /> margin_right<br /> <br /> === Go Development ===<br /> <br /> Because of limited RAM, best to cross compile on a more powerful system:<br /> CGO_ENABLED=0 GOOS=linux GOARCH=arm GOARM=7 go build myprog.go<br /> <br /> === Mail ===<br /> <br /> MUA:<br /> apt install bsd-mailx<br /> apt install mutt<br /> <br /> Mail spool directory (eg NFS mount from server):<br /> /var/mail<br /> <br /> Exim is the default MTA:<br /> dpkg-reconfigure exim4-config<br /> update-exim4.conf<br /> systemctl restart exim4<br /> <br /> Monitor logs:<br /> /var/log/exim4/mainlog<br /> <br /> === Swap ===<br /> free -m<br /> swapon --show<br /> <br /> Add filesystem swap:<br /> swapoff -a<br /> dd if=/dev/zero of=/swapfile bs=1M count=1024<br /> chmod 600 /swapfile<br /> mkswap /swapfile<br /> swapon /swapfile<br /> <br /> Add to /etc/fstab:<br /> /swapfile none swap sw 0 0<br /> <br /> To see current zram configuration:<br /> zramctl <br /> zramctl --output-all /dev/zram0<br /> <br /> To resize:<br /> swapoff /dev/zram0<br /> zramctl --reset /dev/zram0<br /> zramctl --find --size 512M<br /> mkswap /dev/zram0<br /> swapon /dev/zram0<br /> <br /> === NFS Automounter ===<br /> <br /> apt install autofs nfs-common -y<br /> <br /> Edit /etc/auto.master and enable the host map:<br /> /net -hosts --timeout=60<br /> <br /> systemctl enable autofs<br /> systemctl restart autofs<br /> <br /> === NTP Client ===<br /> <br /> apt install systemd-timesyncd -y<br /> <br /> Edit /etc/systemd/timesyncd.conf and set NTP parameter<br /> systemctl restart systemd-timesyncd<br /> timedatectl status<br /> timedatectl timesync-status<br /> <br /> === Temperature ===<br /> <br /> echo &quot;scale=2; $(cat /sys/class/thermal/thermal_zone0/temp) / 1000&quot; | bc<br /> <br /> CPU Core throttling above 80 C.</div>

NickPGSmith https://www.smithnet.org.uk/wiki/index.php?title=Rasberry_Pi&diff=1716 2026-05-27T15:13:59Z

<p>NickPGSmith: /* Go */</p> <hr /> <div>== Device ==<br /> <br /> * [https://www.raspberrypi.com/documentation/computers/raspberry-pi.html#raspberry-pi-3-model-b Rasberry Pi 3B] (&quot;Rev 1.2&quot;)<br /> <br /> cat /proc/device-tree/model<br /> <br /> * [https://www.raspberrypi.com/documentation/computers/raspberry-pi.html#gpio-and-the-40-pin-header GPIO]<br /> <br /> == Rasbery Pi OS ==<br /> <br /> See [https://www.raspberrypi.com/documentation/computers/config_txt.html /boot/firmware/config.txt].<br /> <br /> Command line configuration program:<br /> raspi-config<br /> <br /> Upgrade:<br /> apt update &amp;&amp; sudo apt upgrade -y<br /> <br /> == GPIO ==<br /> <br /> Raspberry Pi OS versions use the newer gpiod subsystem (which interacts with /dev/gpiochip)<br /> <br /> python:<br /> apt install python3-gpiozero -y<br /> <br /> go: periph.io<br /> <br /> <br /> === Apache Web Server ===<br /> <br /> apt install apache2<br /> <br /> * Configuration: /etc/apache2<br /> * Serve from: /var/www/html<br /> <br /> === Composite Video ===<br /> <br /> Note: CVBS is on sleve; Gnd is ring 3. It is enabled when no HDMI monitor is connected.<br /> <br /> In /boot/firmware/config.txt:<br /> enable_tvout=1<br /> dtoverlay=vc4-kms-v3d,composite<br /> <br /> Ensure hdmi_force_hotplug=1 is commented out or set to 0.<br /> <br /> In /boot/firmware/cmdline.txt, either:<br /> vc4.tv_norm=PAL<br /> vc4.tv_norm=NTSC<br /> <br /> To control overscan, see settings:<br /> margin_left<br /> margin_right<br /> <br /> === Mail ===<br /> <br /> MUA:<br /> apt install bsd-mailx<br /> apt install mutt<br /> <br /> Mail spool directory (eg NFS mount from server):<br /> /var/mail<br /> <br /> Exim is the default MTA:<br /> dpkg-reconfigure exim4-config<br /> update-exim4.conf<br /> systemctl restart exim4<br /> <br /> Monitor logs:<br /> /var/log/exim4/mainlog<br /> <br /> === Swap ===<br /> free -m<br /> swapon --show<br /> <br /> Add filesystem swap:<br /> swapoff -a<br /> dd if=/dev/zero of=/swapfile bs=1M count=1024<br /> chmod 600 /swapfile<br /> mkswap /swapfile<br /> swapon /swapfile<br /> <br /> Add to /etc/fstab:<br /> /swapfile none swap sw 0 0<br /> <br /> To see current zram configuration:<br /> zramctl <br /> zramctl --output-all /dev/zram0<br /> <br /> To resize:<br /> swapoff /dev/zram0<br /> zramctl --reset /dev/zram0<br /> zramctl --find --size 512M<br /> mkswap /dev/zram0<br /> swapon /dev/zram0<br /> <br /> === NFS Automounter ===<br /> <br /> apt install autofs nfs-common -y<br /> <br /> Edit /etc/auto.master and enable the host map:<br /> /net -hosts --timeout=60<br /> <br /> systemctl enable autofs<br /> systemctl restart autofs<br /> <br /> === NTP Client ===<br /> <br /> apt install systemd-timesyncd -y<br /> <br /> Edit /etc/systemd/timesyncd.conf and set NTP parameter<br /> systemctl restart systemd-timesyncd<br /> timedatectl status<br /> timedatectl timesync-status<br /> <br /> === Temperature ===<br /> <br /> echo &quot;scale=2; $(cat /sys/class/thermal/thermal_zone0/temp) / 1000&quot; | bc<br /> <br /> CPU Core throttling above 80 C.</div>

NickPGSmith https://www.smithnet.org.uk/wiki/index.php?title=Rasberry_Pi&diff=1715 2026-05-27T15:13:25Z

<p>NickPGSmith: /* Rasbery Pi OS */</p> <hr /> <div>== Device ==<br /> <br /> * [https://www.raspberrypi.com/documentation/computers/raspberry-pi.html#raspberry-pi-3-model-b Rasberry Pi 3B] (&quot;Rev 1.2&quot;)<br /> <br /> cat /proc/device-tree/model<br /> <br /> * [https://www.raspberrypi.com/documentation/computers/raspberry-pi.html#gpio-and-the-40-pin-header GPIO]<br /> <br /> == Rasbery Pi OS ==<br /> <br /> See [https://www.raspberrypi.com/documentation/computers/config_txt.html /boot/firmware/config.txt].<br /> <br /> Command line configuration program:<br /> raspi-config<br /> <br /> Upgrade:<br /> apt update &amp;&amp; sudo apt upgrade -y<br /> <br /> === Go ===<br /> <br /> Cross compile on amd64:<br /> CGO_ENABLED=0 GOOS=linux GOARCH=arm GOARM=7 go build myprog.go<br /> <br /> == GPIO ==<br /> <br /> Raspberry Pi OS versions use the newer gpiod subsystem (which interacts with /dev/gpiochip)<br /> <br /> python:<br /> apt install python3-gpiozero -y<br /> <br /> go: periph.io<br /> <br /> <br /> === Apache Web Server ===<br /> <br /> apt install apache2<br /> <br /> * Configuration: /etc/apache2<br /> * Serve from: /var/www/html<br /> <br /> === Composite Video ===<br /> <br /> Note: CVBS is on sleve; Gnd is ring 3. It is enabled when no HDMI monitor is connected.<br /> <br /> In /boot/firmware/config.txt:<br /> enable_tvout=1<br /> dtoverlay=vc4-kms-v3d,composite<br /> <br /> Ensure hdmi_force_hotplug=1 is commented out or set to 0.<br /> <br /> In /boot/firmware/cmdline.txt, either:<br /> vc4.tv_norm=PAL<br /> vc4.tv_norm=NTSC<br /> <br /> To control overscan, see settings:<br /> margin_left<br /> margin_right<br /> <br /> === Mail ===<br /> <br /> MUA:<br /> apt install bsd-mailx<br /> apt install mutt<br /> <br /> Mail spool directory (eg NFS mount from server):<br /> /var/mail<br /> <br /> Exim is the default MTA:<br /> dpkg-reconfigure exim4-config<br /> update-exim4.conf<br /> systemctl restart exim4<br /> <br /> Monitor logs:<br /> /var/log/exim4/mainlog<br /> <br /> === Swap ===<br /> free -m<br /> swapon --show<br /> <br /> Add filesystem swap:<br /> swapoff -a<br /> dd if=/dev/zero of=/swapfile bs=1M count=1024<br /> chmod 600 /swapfile<br /> mkswap /swapfile<br /> swapon /swapfile<br /> <br /> Add to /etc/fstab:<br /> /swapfile none swap sw 0 0<br /> <br /> To see current zram configuration:<br /> zramctl <br /> zramctl --output-all /dev/zram0<br /> <br /> To resize:<br /> swapoff /dev/zram0<br /> zramctl --reset /dev/zram0<br /> zramctl --find --size 512M<br /> mkswap /dev/zram0<br /> swapon /dev/zram0<br /> <br /> === NFS Automounter ===<br /> <br /> apt install autofs nfs-common -y<br /> <br /> Edit /etc/auto.master and enable the host map:<br /> /net -hosts --timeout=60<br /> <br /> systemctl enable autofs<br /> systemctl restart autofs<br /> <br /> === NTP Client ===<br /> <br /> apt install systemd-timesyncd -y<br /> <br /> Edit /etc/systemd/timesyncd.conf and set NTP parameter<br /> systemctl restart systemd-timesyncd<br /> timedatectl status<br /> timedatectl timesync-status<br /> <br /> === Temperature ===<br /> <br /> echo &quot;scale=2; $(cat /sys/class/thermal/thermal_zone0/temp) / 1000&quot; | bc<br /> <br /> CPU Core throttling above 80 C.</div>

NickPGSmith