shutdown

 

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 Maintenance Commands                                 shutdown(1M)
 
 
 


NAME
      shutdown - shut down system, change system state
 


SYNOPSIS
      /usr/sbin/shutdown [ -y ]  [ -g grace-period ]   [  -i init-
      state ]  [ message ]
 


DESCRIPTION
      shutdown is executed by the super user to change  the  state
      of the machine. In most cases, it is used to change from the
      multi-user state (state 2) to another state.
 
      By default, shutdown brings the system to a state where only
      the  console  has access to the operating system. This state
      is called single-user.
 
      Before starting to shut down daemons and killing  processes,
      shutdown  sends  a  warning message and, by default, a final
      message asking for confirmation. message is a string that is
      sent  out following the standard warning message "The system
      will be shut down in ..."  If the string contains more  than
      one word, it should be contained within single (') or double
      (") quotation marks.
 
      The warning message and the user provided message are output
      when  there  are  7200, 3600, 1800, 1200, 600, 300, 120, 60,
      and 30 seconds remaining before  shutdown begins. See  EXAM-
      PLES.
 
      System state definitions are:
 
      state 0
            Stop the operating system.
 
      state 1
            State 1 is referred to as the administrative state. In
            state  1  file  systems required for multi-user opera-
            tions are mounted,  and  logins  requiring  access  to
            multi-user  file  systems can be used. When the system
            comes up from firmware mode into  state  1,  only  the
            console  is active and other multi-user (state 2) ser-
            vices  are  unavailable.  Note  that  not   all   user
            processes  are  stopped when transitioning from multi-
            user state to state 1.
 
      state s, S
            State s (or S)  is  referred  to  as  the  single-user
            state.  All  user processes are stopped on transitions
            to this state. In the single-user state, file  systems
            required  for  multi-user logins are unmounted and the
            system can  only  be  accessed  through  the  console.
            Logins  requiring  access  to  multi-user file systems
 
 
 
 SunOS 5.8           Last change: 19 Dec 1995                    1
 
 
 
 
 
 
 Maintenance Commands                                 shutdown(1M)
 
 
 
            cannot be used.
 
      state 5
            Shut the machine down so that it is safe to remove the
            power.   Have  the  machine remove power, if possible.
            The rc0 procedure is called to perform this task.
 
      state 6
            Stop the operating system  and  reboot  to  the  state
            defined  by the initdefault entry in /etc/inittab. The
            rc6 procedure is called to perform this task.
 


OPTIONS
      -y    Pre-answer the confirmation question  so  the  command
            can be run without user intervention.
 
      -g grace-period
            Allow the super user to change the number  of  seconds
            from the 60-second default.
 
      -i init-state
            If there are warnings,  init-state specifies the state
            init  is  to  be  in.  By default, system state `s' is
            used.
 
 EXAMPLES
      Example 1: Using shutdown
 
      In the following example,  shutdown  is  being  executed  on
      host  foo and is scheduled in 120 seconds.  The warning mes-
      sage is output 2 minutes, 1 minute, and  30  seconds  before
      the final confirmation message.
 
      example# shutdown -i S -g 120 "===== disk replacement ====="
      Shutdown started.   Tue Jun   7  14:51:40 PDT  1994
 
      Broadcast Message from root (pts/1) on foo Tue Jun  7 14:51:41...
      The system will be shut down in 2 minutes
      ===== disk replacement =====
      Broadcast Message from root (pts/1) on foo Tue Jun  7 14:52:41...
      The system will be shut down in 1 minutes
      ===== disk replacement =====
      Broadcast Message from root (pts/1) on foo Tue Jun  7 14:53:41...
      The system will be shut down in 30 seconds
      ===== disk replacement =====
      Do you want to continue? (y or n):
 


FILES
      /etc/inittab
            controls process dispatching by init
 
 
 
 
 
 SunOS 5.8           Last change: 19 Dec 1995                    2
 
 
 
 
 
 
 Maintenance Commands                                 shutdown(1M)
 
 
 


ATTRIBUTES
      See attributes(5) for descriptions of the  following  attri-
      butes:
 
      ____________________________________________________________
     |       ATTRIBUTE TYPE        |       ATTRIBUTE VALUE       |
     |_____________________________|_____________________________|
     | Availability                | SUNWcsu                     |
     |_____________________________|_____________________________|
 
 


SEE ALSO
      boot(1M),  halt(1M),  init(1M),   killall(1M),   reboot(1M),
      ufsdump(1M),   init.d(4),   inittab(4),  nologin(4),  attri-
      butes(5)
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 SunOS 5.8           Last change: 19 Dec 1995                    3
 
 
 

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