I'm aware I can use (sudo?)
shutdown -h hh:mm in a terminal window to shut down a system, however the user that is logged in is a kiosk user, which is locked down in such a way that terminal (or any window other than firefox, for that matter) cannot be opened.
My question is:
Is there a way I can do this without having a terminal window opened? I've read about cron, but can't quite work it out.
How can I change the shutoff time depending on what day it is?