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systemd 245
March 2018
Aliases: poweroff(8), poweroff(8), poweroff(8), poweroff(8), poweroff(8), poweroff(8), poweroff(8), poweroff(8), poweroff(8), poweroff(8), poweroff(8), poweroff(8), poweroff(8), poweroff(8), poweroff(8), poweroff(8), poweroff(8), poweroff(8), reboot(8), reboot(8), reboot(8), reboot(8), reboot(8), reboot(8), reboot(8), reboot(8), reboot(8), reboot(8), reboot(8), reboot(8), reboot(8), reboot(8), reboot(8)

systemd-sysv

system and service manager - SysV links

systemd

system and service manager

sysvinit-core

System-V-like init utilities

systemd-sysvcompat

sysvinit compat for systemd

sysvinit

Linux System V Init

shepherd-bins

Shepherd's init binaries

systemd-sysvinit

System V init tools

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, regardless of which one of the three commands is invoked.
--reboot
Reboot the machine, regardless of which one of the three commands is invoked.
-f, --force
Force immediate halt, power-off, or reboot. When specified once, this results in an immediate but clean shutdown by the system manager. When specified twice, this results in an immediate shutdown without contacting the system manager. See the description of --force in systemctl(1) for more details.
-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
Dont 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.
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