Definitions for "watchdog "
The Linux kernel can reset the system if serious problems are detected. This can be implemented via special watchdog hardware, or via a slightly less reliable software-only watchdog inside the kernel. Either way, there needs to be a daemon that tells the kernel the system is working fine. If the daemon stops doing that, the system is reset. watchdog is such a daemon.
Daemonize, monitor and restart programs. logger, daemon, and inittab restart in a small package.
Software watchdog for Linux
A dog kept to watch and guard premises or property, and to give notice of the approach of intruders.
a dog trained to guard property
a dog kept to guard your home,
Watchdog is a BBC television series that investigates viewers' reports of problematic experiences with traders, retailers, and other companies around the UK. It has had great success in changing the awareness consumers have of their purchasing rights and in changing policies of companies, closing businesses down and pushing for law changes.
Keywords:  reboot, supposed, wrong, goes, tool
a tool that is supposed to automatically reboot a computer when something goes wrong
a guardian or defender against theft or illegal practices or waste; "she is the global watchdog for human rights abuses"
A fail-safe mechanism that can be used to set I/O points to a "safe" state if communications with the controller is lost.