Skip to content

blog.Gudynas.lt

About everything

Menu
  • Home
  • AS215899
  • OpenWebRX SDR
  • ADS-B Tracker
  • About sdr.Gudynas.lt
  • Contacts
Menu

Raspberry Hardware Watchdog

Posted on 2021-07-14 by Justas

Automatically power cycle the Raspberry Pi once it gets stuck.

1) Enable the hardware watchdog on your Pi and reboot

sudo su
echo 'dtparam=watchdog=on' >> /boot/config.txt
reboot

2) Install the watchdog system service

sudo apt-get update
sudo apt-get install watchdog

3) Configure the watchdog service

sudo su
echo 'watchdog-device = /dev/watchdog' >> /etc/watchdog.conf
echo 'watchdog-timeout = 15' >> /etc/watchdog.conf
echo 'max-load-1 = 24' >> /etc/watchdog.conf

4) Enable the service

sudo systemctl enable watchdog
sudo systemctl start watchdog
sudo systemctl status watchdog

Now next time your Raspberry Pi freezes, the hardware watchdog will restart it automatically after 15 seconds.

If you want to test this you can try running a fork bomb on your shell:

sudo bash -c ':(){ :|:& };:'

!!!Running this code will render your Raspberry Pi unaccessible until it’s reset by the watchdog.!!!

Leave a Reply Cancel reply

Your email address will not be published. Required fields are marked *


This site uses Akismet to reduce spam. Learn how your comment data is processed.

Categories

  • sdr.Gudynas.lt Project (6)
  • Linux (42)
  • Windows (1)
  • Uncategorized (2)

Archives

  • August 2025 (1)
  • March 2025 (1)
  • November 2024 (2)
  • January 2024 (2)
  • December 2023 (1)
  • October 2023 (1)
  • September 2023 (2)
  • May 2023 (1)
  • April 2023 (1)
  • March 2023 (1)
  • August 2022 (1)
  • July 2022 (1)
  • March 2022 (1)
  • December 2021 (5)
  • November 2021 (5)
  • September 2021 (4)
  • August 2021 (1)
  • July 2021 (1)
  • May 2021 (1)
  • April 2021 (1)
  • January 2021 (1)
  • October 2020 (2)
  • August 2020 (1)
  • May 2020 (1)
  • November 2019 (2)
  • September 2018 (10)

Recent Posts

  • SDR.Gudynas.lt upgrades, ADS-B receiver installed
  • Ready for Winter, Network upgrades, and What was done in 2024 for sdr.gudynas.lt project
  • 2023-10-15 Some SSTV decoding on 10/11m SDR
  • Enabling auto-adjust waterfall colors by default OpenWebRX
  • Enabled Background decoding and HF propagation

Recent Comments

  • Bruce MAYO on About sdr.Gudynas.lt OpenWebRX project
  • BT on About sdr.Gudynas.lt OpenWebRX project
  • Bernd on About sdr.Gudynas.lt OpenWebRX project
July 2021
M T W T F S S
 1234
567891011
12131415161718
19202122232425
262728293031  
« May   Aug »
© 2025 blog.Gudynas.lt | Powered by Minimalist Blog WordPress Theme