This guide is about how to setup watchdog in Ubuntu.
Enable Watchdog
For Ubuntu V180531 the watchdog is enabled by default. However, for newer versions it’s disabled by default. You can use the following commands to enable it.$ sudo ln -s /lib/systemd/system/watchdog.service /etc/systemd/system/multi-user.target.wants/watchdog.service
$ sudo systemctl enable watchdog.service
$ sudo systemctl start watchdog.service
Tip: You need to create the service link manually, due to a debian bug.
Setup Watchdog Timeout
The default timeout is 10S, you can change it in /etc/watchdog.conf.$ sudo vim /etc/watchdog.conf
Modify watchdog-timeout to change the timeout.
Restart watchdog service.$ sudo systemctl restart watchdog
Test Watchdog
Trigger a Kernel crash.$ sudo -i
root@Khadas:~# echo c > /proc/sysrq-trigger
If watchdog setup successfully, the system will reboot after the timeout you set above.
Disable Watchdog
$ sudo systemctl disable watchdog |