Given commands were created as 0 byte files

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rc0

rc0(8)							      System Manager's Manual							    rc0(8)

NAME

       rc0 - Runs command script executed when stopping the system

SYNOPSIS

       rc0

DESCRIPTION

       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  direc-
       tory: 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 initi-
       ated the call.  The umount -a command unmounts all file systems except the root file system.

FILES

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

RELATED INFORMATION

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

																	    rc0(8)

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