How to use Linux software watchdog?

Question

Can anybody tell me how to handle the software watchdog in Linux?

I have a program SampleApplication which runs continuously and I need to restart it if

Answer 1

Use /etc/inittab you can utilize it to start in the specific run levels and if it is killed it shall be restarted automatically

n:2345:respawn:/path/to/app

This will make it respawn in run levels 2345 you probably only need 3 and 5 but this will work fine and is built into Linux.