shutdown man page

shutdown — Halt, power-off or reboot the machine

TL;DR

shutdown -h now

shutdown -r now

shutdown -r +{{5}} &

shutdown -h 13:00

shutdown -c

Synopsis

shutdown [Options...] [TIME] [WALL...]

Description

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.

Options

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 cancel the effect of an invocation of shutdown with a time argument that is not "+0" or "now".

Exit Status

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

See Also

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

Referenced By

apccontrol(8), halt(8), kexec(8), last(1), login(1), nologin(5), sudo(8), systemd.directives(7), systemd.index(7), wall(1).

systemd 231 shutdown