# phpman > info > runit-init

[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)