how to protect my process from being killed?

Question

We have a mission-critical server program on top of Linux and we don\'t want others to terminate it accidentally. If somebody terminates it or it crashes, we want it to rest

Answer 1

You can use init to babysit the process, and since init only terminates on reboot, you don't need a "program B".

Add to the end of /etc/inittab:

x:3:respawn:/path/to/my/program

For information on syntax and other options can be found in man inittab