SHUTDOWN(1M)        RISC/os Reference Manual         SHUTDOWN(1M)



NAME
     shutdown - shut down system, change system state

SYNOPSIS
     /etc/shutdown [ -y ] [ -ggrace_period [ -iinit_state ]

DESCRIPTION
     This command is executed by the super-user to change the
     state of the machine.  By default, it brings the system to a
     state where only the console has access to the UNIX system.
     This state is traditionally called "single-user".

     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.

     -g grace_period
                    allows the super-user to change the number of
                    seconds from the 60-second default.  Note
                    that there is no space between the arguments,
                    e.g.  -g60 specifies a grace period of 60
                    seconds.

     -i init_state  specifies the state that init(1M) is to be
                    put in following the warnings, if any.  By
                    default, system state "s" is used (the same
                    as states "1" and "S").  Note that there is
                    no space between the arguments, e.g.  -i0
                    specifies that the system is to be shutdown,
                    state 0.

     Other recommended system state definitions are:

     state 0
          Shut the machine down so it is safe to remove the
          power.  The /etc/rc0 procedure is called to do this
          work.

     state 1, s, S
          Bring the machine to the state traditionally called
          single-user.  The /etc/rc0 procedure is called to do
          this work.  (Though s and 1 are both used to go to sin-
          gle user state, s only kills processes spawned by init



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SHUTDOWN(1M)        RISC/os Reference Manual         SHUTDOWN(1M)



          and does not unmount file systems.  State 1 unmounts
          everything except root and kills all user processes,
          except those that relate to the console.)

     state 6
          Stop the UNIX system and reboot to the state defined by
          the initdefault entry in /etc/inittab.

SEE ALSO
     init(1M), rc0(1M), rc2(1M).
     inittab(4) in the Programmer's Reference Manual.












































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