# man > init(8)

[_runit-init_(8)](https://www.chedong.com/phpMan.php/man/runit-init/8/markdown)                          System Manager's Manual                         [_runit-init_(8)](https://www.chedong.com/phpMan.php/man/runit-init/8/markdown)

## NAME
       init - a UNIX process no 1

## SYNOPSIS
       **init **[ 0 | 6 ]

## DESCRIPTION
       **runit-init **is the first process the kernel starts.  If **runit-init **is started as process no 1,
       it runs and replaces itself with [**runit**(8)](https://www.chedong.com/phpMan.php/man/runit/8/markdown).

       If  **runit-init  **is started while the system is up, it must be either called as **init 0 **or **init**
       **6**:

       **init 0 **tells the Unix process no 1 to shutdown and halt the system.  To signal  [**runit**(8)](https://www.chedong.com/phpMan.php/man/runit/8/markdown)  the
              system  halt request, **runit-init **removes all permissions of the file _/run/runit.reboot_
              (chmod 0), and sets the execute by owner  permission  of  the  file  _/run/runit.stopit_
              (chmod 100).  Then a CONT signal is sent to [**runit**(8)](https://www.chedong.com/phpMan.php/man/runit/8/markdown).

       **init 6 **tells the Unix process no 1 to shutdown and reboot the system.  To signal [**runit**(8)](https://www.chedong.com/phpMan.php/man/runit/8/markdown) the
              system  reboot  request,  **runit-init **sets the execute by owner permission of the files
              _/run/runit.reboot_ and _/run/runit.stopit_ (chmod 100). Then a CONT  signal  is  sent  to
              [**runit**(8)](https://www.chedong.com/phpMan.php/man/runit/8/markdown).

## EXIT CODES
       **runit-init **returns 111 on error, 0 in all other cases.

## SEE ALSO
       [runit(8)](https://www.chedong.com/phpMan.php/man/runit/8/markdown), [runsvdir(8)](https://www.chedong.com/phpMan.php/man/runsvdir/8/markdown), [runsvchdir(8)](https://www.chedong.com/phpMan.php/man/runsvchdir/8/markdown), [sv(8)](https://www.chedong.com/phpMan.php/man/sv/8/markdown), [runsv(8)](https://www.chedong.com/phpMan.php/man/runsv/8/markdown), [chpst(8)](https://www.chedong.com/phpMan.php/man/chpst/8/markdown), [utmpset(8)](https://www.chedong.com/phpMan.php/man/utmpset/8/markdown), [svlogd(8)](https://www.chedong.com/phpMan.php/man/svlogd/8/markdown)

       <http://smarden.org/runit/>

## AUTHOR
       Gerrit Pape <<pape@smarden.org>>

                                                                                       [_runit-init_(8)](https://www.chedong.com/phpMan.php/man/runit-init/8/markdown)