# man > reboot(8)

[_POWEROFF_(8)](https://www.chedong.com/phpMan.php/man/POWEROFF/8/markdown)                                   poweroff                                   [_POWEROFF_(8)](https://www.chedong.com/phpMan.php/man/POWEROFF/8/markdown)

## 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)](https://www.chedong.com/phpMan.php/man/systemctl/1/markdown) 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)](https://www.chedong.com/phpMan.php/man/systemd/1/markdown), [**systemctl**(1)](https://www.chedong.com/phpMan.php/man/systemctl/1/markdown), [**shutdown**(8)](https://www.chedong.com/phpMan.php/man/shutdown/8/markdown), [**wall**(1)](https://www.chedong.com/phpMan.php/man/wall/1/markdown)

systemd 255                                                                              [_POWEROFF_(8)](https://www.chedong.com/phpMan.php/man/POWEROFF/8/markdown)