SHUTDOWN(C)              XENIX System V               SHUTDOWN(C)



     Name
          shutdown - Terminates all processing.

     Syntax
          /etc/shutdown [ time ] [ su ]

     Description
          shutdown is part of the XENIX operation procedures.  Its
          primary function is to terminate all currently running
          processes in an orderly and cautious manner.  The time
          argument is the number of minutes before a shutdown will
          occur.  The optional su argument lets the user go single-
          user, without completely shutting down the system.  However,
          the system is shut down for multi-user use.  shutdown goes
          through the following steps.  First, all users logged on the
          system are notified to log off the system by a broadcasted
          message. All file system super-blocks are updated before the
          system is stopped (see sync(C)).  This must be done before
          rebooting the system, to insure file system integrity.

     See Also
          sync(C), umount(C), wall(C)

     Diagnostics
          The most common error diagnostic that will occur is device
          busy.  This diagnostic appears when a particular file system
          could not be unmounted.  See umount(C).

     Notes
          Once shutdown has been invoked, it must be allowed to run to
          completion and must not be interrupted by pressing BREAK or
          DEL.

          shutdown locks the hard disk heads.





















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