shutdown(1M)                                         shutdown(1M)



     NAME
          shutdown - close down the system at a given time

     SYNOPSIS
          /etc/shutdown [-hknry ] [ -ginterval] [-iinitstate] [timeout
          [warning-message ...]]

     DESCRIPTION
          shutdown provides an automated shutdown procedure which a
          superuser can use to notify users nicely when the system is
          shutting down, saving them from system administrators, hack-
          ers, and gurus, who would otherwise not bother with such ni-
          ceties.

          timeout is the time at which shutdown brings the system down
          and may be the word now (indicating an immediate shutdown)
          or specify a future time in one of two formats:  number and
          hour:min.  The first form brings the system down in number
          minutes and the second brings the system down at the time of
          day indicated (as a 24-hour clock).  If timeout is not
          specified, shutdown prompts the user for a value.

          At intervals which get closer together as apocalypse ap-
          proaches, the warning messages are displayed at the termi-
          nals of all users on the system.  The interval may be set
          with the -g option.  If no message is specified on the com-
          mand line, shutdown prompts the user for one.

          If -k is specified, no further actions are taken.  (If it
          isn't obvious, -k is to make people think the system is go-
          ing down!)

          When the timeout has expired, shutdown asks for final con-
          firmation.  Then a signal is sent to init(1M) to bring the
          system down to single-user state.  All other user processes
          are then terminated.  Subsequently, if -r or -h was used,
          then shutdown emulates reboot(1M), powerdown(1M), respec-
          tively.  Alternatively, the final system state may be speci-
          fied using the -i option.  The initstates 6 and 0 are
          synonyms for the options -r and -h, respectively.  The de-
          fault initstate is 1.

          The -n option prevents the normal sync(2) before stopping.
          If this option is used with the options -h or -r, the state
          of the file systems is not synchronized; this causes the
          file systems to be checked when the system is rebooted.

          The -y option instructs shutdown to use a default warning-
          message and a default timeout of two minutes, if they are
          not supplied on the command line.  The -y option is implied
          when the options -h, -k or -r are used.




     April, 1990                                                     1

     shutdown(1M)                                         shutdown(1M)



     FILES
          /etc/shutdown

     SEE ALSO
          reboot(1M), powerdown(1M), login(1), reboot(2).

     BUGS
          Only allows you to kill the system between now and 23:59 if
          you use the absolute time for shutdown.














































     2                                                     April, 1990