shutdown(1M)                                         shutdown(1M)



NAME
     shutdown - terminates processes that support multi-user mode
     and enters single-user mode

SYNOPSIS
     shutdown [-ginterval] [-h] [-iinitstate] [-k] [-n] [-r] [-y]
     [timeout [warning-message]]

ARGUMENTS
     -ginterval
          Specifies the time interval between the messages
          warning users of imminent shutdown of the system.

     -h   Runs powerdown(1M).  The system automatically uses the
          default timeout and warning message when you use this
          option.

     -iinitstate
          Specifies the final system state after shutdown.
          Specifying 6 causes a reboot (same effect as that of
          the option -r).  Specifying 0 causes the system to
          power down (same effect as that of the option -h).  The
          default is 1.

     -k   Causes the shutdown warning message to be broadcast to
          other users, but doesn't actually shut the system down.
          This option is handy in situations where you want the
          whole system to yourself.  The system automatically
          uses the default timeout and warning message when you
          use this option.

     -n   Prevents the normal sync(2) before stopping.  If you
          use this option with -h or -r, the file system states
          don't synchronize, so the system checks the file
          systems when rebooting.

     -r   Causes a system reboot after shutdown.  (For more
          information, see reboot(1M).)  The system automatically
          uses the default timeout and warning message when you
          use this option.

     timeout
          Specifies the time at which the shutdown process should
          begin.  Use now to indicate an immediate shutdown.  You
          can set the system shutdown to happen a particular
          number of minutes from the current time, or at a set
          time according to the 24-hour clock.  To specify the
          number of minutes until shutdown, use this format:

             number-of-minutes

          To set the shutdown for a particular time between now



January 1992                                                    1

shutdown(1M)                                         shutdown(1M)



          and 23:59, use this format:

             hour:min

          If you don't specify timeout, shutdown prompts you for
          a value.

     warning-message
          Specifies the message to be displayed at each of the
          terminals supported by the system.  These warning
          messages are displayed with increasing frequency as the
          shutdown time approaches.  If you don't specify a
          warning message, shutdown prompts you for one.

     -y   Causes shutdown to use a default warning-message and a
          default timeout of two minutes, if they are not
          supplied on the command line.  Without this option,
          unless you specify warning-message and timeout, the
          system prompts you to enter a message and time until
          shutdown.

DESCRIPTION
     shutdown automatically gives other system users advance
     notice of the impending system shutdown and then performs an
     orderly shutdown procedure.  In order to use shutdown you
     must be logged in to the root account.  When the timeout
     expires, shutdown prompts you to give final confirmation.
     Once you confirm the shutdown, the system signals init and
     brings the system down to a single-user state, terminating
     all other user processes.

LIMITATIONS
     If you use the absolute time for shutdown, you can only shut
     down the system between now and 23:59.

FILES
     /etc/shutdown
          Executable file

SEE ALSO
     powerdown(1M), reboot(1M)

     login(1) in A/UX Command Reference

     reboot(2) in A/UX Programmer's Reference










2                                                    January 1992