POWEROFF(8) poweroff POWEROFF(8)
NAME
poweroff, reboot, halt - Power off, reboot, or halt the machine
SYNOPSIS
poweroff [OPTIONS...]
reboot [OPTIONS...]
halt [OPTIONS...]
DESCRIPTION
poweroff, reboot, and halt may be used to power off, reboot, or halt the
machine. All three commands take the same options.
OPTIONS
The following options are understood:
--help
Print a short help text and exit.
Added in version 253.
--halt
Halt the machine, regardless of which one of the three commands is
invoked.
Added in version 253.
-p, --poweroff
Power off the machine, when either halt or poweroff is invoked. This
option is ignored when reboot is invoked.
Added in version 253.
--reboot
Reboot the machine, regardless of which one of the three commands is
invoked.
Added in version 253.
-f, --force
Force immediate power-off, halt, or reboot. If specified, the
command does not contact the init system. In most cases, filesystems
are not properly unmounted before shutdown. For example, the command
reboot -f is mostly equivalent to systemctl reboot -ff, instead of
systemctl reboot -f.
Added in version 253.
-w, --wtmp-only
Only write wtmp shutdown entry, do not actually power off, reboot,
or halt.
Added in version 253.
-d, --no-wtmp
Do not write wtmp shutdown entry.
Added in version 253.
-n, --no-sync
Do not sync hard disks/storage media before power-off, reboot, or
halt.
Added in version 253.
--no-wall
Do not send wall message before power-off, reboot, or halt.
Added in version 253.
EXIT STATUS
On success, 0 is returned, a non-zero failure code otherwise.
NOTES
These commands are implemented in a way that preserves basic
compatibility with the original SysV commands. systemctl(1) verbs
poweroff, reboot, halt provide the same functionality with some
additional features.
Note that on many SysV systems halt used to be synonymous to poweroff,
i.e. both commands would equally result in powering the machine off.
systemd is more accurate here, and halt results in halting the machine
only (leaving power on), and poweroff is required to actually power it
off.
SEE ALSO
systemd(1), systemctl(1), shutdown(8), wall(1)
systemd 257.9 POWEROFF(8)
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