I found: https://forum.armbian.com/topic/2898-how-to-install-enable-and-start-watchdog-in-h3/ Install: sudo apt-get install watchdog Test watchdog: Activate, after 16 sec the nanopi is restarted: sudo sh -c 'echo 1 > /dev/watchdog' Deactivate: sudo sh -c 'echo V > /dev/watchdog' Start the watchdog s...