HALT(8) halt HALT(8)
NAME
halt, poweroff, reboot - Halt, power-off or reboot the machine
SYNOPSIS
halt [OPTIONS...]
poweroff [OPTIONS...]
reboot [OPTIONS...]
DESCRIPTION
halt, poweroff, reboot may be used to halt, power-off, or reboot the
machine. All three commands take the same options.
OPTIONS
The following options are understood:
--help
Print a short help text and exit.
--halt
Halt the machine, regardless of which one of the three commands is
invoked.
-p, --poweroff
Power-off the machine, when either halt or poweroff is invoked.
This option is ignored when reboot is invoked.
--reboot
Reboot the machine, regardless of which one of the three commands
is invoked.
-f, --force
Force immediate halt, power-off, 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.
-w, --wtmp-only
Only write wtmp shutdown entry, do not actually halt, power-off,
reboot.
-d, --no-wtmp
Do not write wtmp shutdown entry.
-n, --no-sync
Don't sync hard disks/storage media before halt, power-off, reboot.
--no-wall
Do not send wall message before halt, power-off, reboot.
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
halt, poweroff, reboot 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 252 HALT(8)
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