Halt, power -off or reboot the machine


Power off (halt) immediately

$ shutdown -h now

Reboot immediately

$ shutdown -r now

Reboot in 5 minutes

$ shutdown -r +[5] &

Shutdown at 1:00 pm (Uses 24h clock)

$ shutdown -h 13:00

Cancel a pending shutdown/reboot operation

$ shutdown -c


' shutdown 'u shutdown [OPTIONS...] [TIME] [WALL...]


shutdown may be used to halt, power -off or reboot the machine .

The first argument may be a time string (which is usually "now") . Optionally, this may be followed by a wall message to be sent to all logged -in users before going down .

The time string may either be in the format hh:mm for hour/minutes specifying the time to execute the shutdown at, specified in 24h clock format . Alternatively it may be in the syntax +m referring to the specified number of minutes m from now . now is an alias for "+0", i .e . for triggering an immediate shutdown . If no time argument is specified, +1 is implied .

Note that to specify a wall message you must specify a time argument, too .

If the time argument is used, 5 minutes before the system goes down the /run/nologin file is created to ensure that further logins shall not be allowed .


The following options are understood:

--help Print a short help text and exit .

-H , --halt Halt the machine .

-P , --poweroff Power -off the machine (the default) .

-r , --reboot Reboot the machine .

-h Equivalent to --poweroff ,unless --halt is specified .

-k Do not halt, power -off, reboot, just write wall message .

--no -wall Do not send wall message before halt, power -off, reboot .

-c Cancel a pending shutdown . This may be used to cancel the effect of an invocation of shutdown with a time argument that is not +0 or now.


On success, 0 is returned, a non -zero failure code otherwise .


systemd(1), systemctl(1), halt(8), wall(1)

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