Thank you for your help, but I don't want cgminer to restart, I want the whole miner to reboot. Isn't there a linux command for rebooting with a timer like "shutdown -p 300" but then for rebooting?

EDIT: I got it, the command is reboot -d [SECONDS], so you could type in the command in system > startup so the command will be executed at startup and will repeat everytime after boot!