man > reboot(8)

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
           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)

systemd 255                                                                              POWEROFF(8)