This command is similar to the restart command, but it simply shuts the computer down and does not reboot.

If the optional delay-seconds parameter is provided, the shutdown will happen automatically after the specified delay.

If a user is logged in, a UI will be displayed that shows the delay counting down. In this case, the UI will have a Shutdown Now button instead of a Cancel button. If the delay parameter is not specified, the user is prompted to press a button to shut down the computer

Version Platforms
8.0.584.0 AIX, HP-UX, Mac, Red Hat, SUSE, Solaris, Windows
8.1.535.0 Debian, Ubuntu


shutdown [delay-seconds]

Where delay-seconds is an optional parameter to provide a delay before shutting down.


This command will shut down the computer in three minutes.

shutdown 180


The delayed shutdown is a forced shutdown. It will not prompt the user to save changes to documents, etc. The machine will shut down without further prompting.