About system time in a bash script

Question

I'm starting work on a bash script that will shutdown my computer at a certain time of day, but I'm not really sure what all specifically needs to go into that. Could someone post an example of how they would do it?

Answer 1

If you want to shut down at 22:15 every day, be root, run crontab -e , then add

15 22 * * * shutdown -h 5

on a line by itself.

Then save. At 22:15 every day, you will get a warning that the system will shut down in 5 minutes, and five minutes later, true to its word, it shuts down. If you want to abort the shutdown, run shutdown -c as root after the warning.