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
    Don't 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)