# halt(8) - man - phpMan

[HALT(8)](https://www.chedong.com/phpMan.php/man/HALT/8/markdown)                                         halt                                         [HALT(8)](https://www.chedong.com/phpMan.php/man/HALT/8/markdown)



## 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)](https://www.chedong.com/phpMan.php/man/systemctl/1/markdown) 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
           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)](https://www.chedong.com/phpMan.php/man/systemctl/1/markdown) 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)](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 249                                                                                  [HALT(8)](https://www.chedong.com/phpMan.php/man/HALT/8/markdown)