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SHUTDOWN(8) shutdown SHUTDOWN(8)

NAME

shutdown - Halt, power-off or reboot the machine

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
Prints a short help text and exits.
-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
Don't halt, power-off, reboot, just write wall message.
--no-wall
Don't 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.

NOTES

This is a legacy command available for compatibility only.

SEE ALSO

 
systemd(1), systemctl(1), halt(8), wall(1)
systemd 204