Shut Down Linux After a Set Time

You can schedule a Linux shutdown from the command line. This is useful for temporary maintenance, lab machines, downloads or systems that should power off after a task window.

Shut down after a delay

sudo shutdown -h +30

This schedules a halt or power-off in 30 minutes, depending on the system.

Shut down at a specific time

sudo shutdown -h 23:30

Cancel a scheduled shutdown

sudo shutdown -c

Only schedule shutdowns on shared systems after warning other users. On servers, check active sessions and running jobs first.