# phpman > man > killall5(8)

[KILLALL5(8)](https://www.chedong.com/phpMan.php/man/KILLALL5/8/markdown)                      Linux System Administrator's Manual                     [KILLALL5(8)](https://www.chedong.com/phpMan.php/man/KILLALL5/8/markdown)



## NAME
       killall5 -- send a signal to all processes.

## SYNOPSIS
       **killall5** **-signalnumber** [**-o** _omitpid_[,_omitpid_...]]  [**-o** _omitpid_[,_omitpid_...]...]

## DESCRIPTION
       **killall5**  is  the  SystemV  killall command. It sends a signal to all processes except kernel
       threads and the processes in its own session, so it won't kill the shell that is running  the
       script  it  was  called  from.  Its  primary  (only)  use  is  in the **rc** scripts found in the
       /etc/init.d directory.

## OPTIONS
       -o _omitpid_
              Tells _killall5_ to omit processes with that process id.

## NOTES
       _killall5_ can also be invoked as pidof, which is simply a (symbolic) link to the _killall5_ pro‐
       gram.

## EXIT STATUS
       The program return zero if it killed processes.  It return 2 if no process were killed, and 1
       if it was unable to find any processes (/proc/ is missing).

## SEE ALSO
       [**halt**(8)](https://www.chedong.com/phpMan.php/man/halt/8/markdown), [**reboot**(8)](https://www.chedong.com/phpMan.php/man/reboot/8/markdown), [**pidof**(8)](https://www.chedong.com/phpMan.php/man/pidof/8/markdown)

## AUTHOR
       Miquel van Smoorenburg, <miquels@cistron.nl>



                                             04 Nov 2003                                 [KILLALL5(8)](https://www.chedong.com/phpMan.php/man/KILLALL5/8/markdown)