"Watchdog runs various checks to see if the hardware has locked up. If it detects that it has happened, it will reboot the machine."
"A virtual device is created (/dev/watchdog). If the virtual device isn't kicked by a process, Watchdog reboots the system."
"Although Watchdog can be essential for servers, it can also be useful for desktops. If a machine locks up, Watchdog will reboot it, ensuring access."
Watchdog is a software application designed to monitor Linux systems for hardware lock-ups. It creates a virtual device that resets a timer when 'kicked' by a process. If the timer is not reset, Watchdog automatically reboots the system. While hardware watchdogs are more reliable, software watchdogs are more accessible for most Linux systems. This tool is particularly beneficial for servers without direct user interfaces and can also assist desktop users by ensuring remote access is maintained even after a lock-up.
Read at ZDNET
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