shutdown(1M)

NAME
     shutdown - shut down system, change system state

SYNOPSIS
     cd /; /etc/shutdown [ -y ] [ -ggrace_period [ -iinit_state ] [ -p ]

DESCRIPTION
     This command is executed by the superuser to change the state of the
     machine.  By default, it brings the system down into the PROM monitor.

     The command sends a warning message and a final message before it starts
     actual shutdown activities.  By default, the command asks for
     confirmation before it starts shutting down daemons and killing
     processes.  The options are used as follows:

     -y               Pre-answers the confirmation question so the command can
                      be run without user intervention.  A default of 60
                      seconds is allowed between the warning message and the
                      final message.  Another 60 seconds is allowed between
                      the final message and the confirmation, unless the grace
                      period is less than 60 seconds, in which case the grace
                      period is used.

     -ggrace_period   Allows the superuser to change the number of seconds
                      from the 60-second default.

     -iinit_state     Specifies the state that init(1M) is to be put in
                      following the warnings, if any.  By default, system
                      state "0" is used.

     -p               If the new init_state is 0, -p requests that the power
                      be turned off after the system is shut down.  Only some
                      systems support this.  For automatically turning the
                      system back on, see wakeupat(1M).

     The definitions of the init_state values that shutdown accept are:

     state 0          Stop the IRIX system and go to the firmware monitor.  At
                      this point it is safe to power down the machine.  The
                      /etc/rc0 procedure is called upon entering this
                      init_state to perform various system cleanup functions.

     state 1, s, S    Bring the machine to the state traditionally called
                      single-user, which provides a quiescent system and a
                      superuser shell running on the system console.  Upon
                      entering this state, the system kills all user processes
                      and unmounts all filesystems except the root (local
                      filesystems may be remounted before the shell prompt
                      appears, in some implementations).  The /etc/rc0
                      procedure is called to do these and various other system
                      cleanup functions.
     state 6          Stop the IRIX system and reboot to the state defined by
                      the initdefault entry in /etc/inittab.

CAPABILITIES
     The root user at MAC label .I dblow does not need capabilities, whereas
     if the MAC label  other than dblow must at least have CAP_MAC_WRITE
     capability in their permitted set of capabilities to perform the shutdown
     operation.
     In addition, capability CAP_SHUTDOWN is needed when requesting to power
     off the system with the -p option.

SEE ALSO
     init(1M), uadmin(1M), rc0(1M), rc2(1M), wakeupat(1M), inittab(4),
     capabilities(4).