NAME    [Toc]    [Back]

       rc0  - Runs command script executed when stopping the system

SYNOPSIS    [Toc]    [Back]

       rc0

DESCRIPTION    [Toc]    [Back]

       The rc0 script contains run commands that enable a  smooth
       shutdown  and bring the system to a single-user state; run
       levels 0 and s. In addition to commands listed  in  within
       the  script  itself, rc0 contains instructions to run commands
 found in  the  /sbin/rc0.d  directory.   The  script
       defines  the  conditions under which the commands execute;
       some commands run if the system is being shut  down  while
       others  run  if the system is being shut down and rebooted
       to single user.

       By convention, files in the  /sbin/rc0.d  directory  begin
       with  either the letter "K" or the letter "S" and are followed
 by a two-digit number and a filename, for example:

       K00enlogin     K05lpd     K60cron     K30nfs

       In general, the system starts commands that begin with the
       letter  "S"  and stops commands that begin with the letter
       "K." The numbering of commands in the  /sbin/rc0.d  directory
  is  important  since  the numbers are sorted and the
       commands  are  run  in  ascending  order.   Files  in  the
       /sbin/rc0.d  directory  are normally links to files in the
       /etc/init.d directory.

       An entry in the inittab file causes the system to  execute
       the rc0 script, for example:

       ss:Ss:wait:/sbin/rc0  shutdown  < /dev/console > /dev/console
  2>&1  s0:0:wait:/sbin/rc0  off  <   /dev/console   >
       /dev/console 2>&1

       The  following operations are typical of those that result
       from executing the rc0 script and the commands located  in
       the /sbin/rc0.d directory: Notify users that the system is
       shutting down.  Sync the disks Stop  system  services  and
       daemons Stop processes Kill processes Unmount file systems
       Invoke init if the system is being  shut  down  to  single
       user

       The killall command sends a SIGTERM signal to stop running
       processes; SIGKILL follows to kill  all  processes  except
       the  process which initiated the call.  The umount -a command
 unmounts all file systems except the root  file  system.

FILES    [Toc]    [Back]

       Specifies the command path Specifies the directory of commands
 that corresponds to the run level

SEE ALSO    [Toc]    [Back]

       Commands: init(8), killall(8), rc2(8), rc3(8), shutdown(8)



                                                           rc0(8)