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    Command:

    shutdown

    
    
    

    SYNOPSIS

           shutdown [OPTION]...  TIME [MESSAGE]
    
    
    

    DESCRIPTION

           shutdown arranges for the system to be brought down in a safe way.  All
           logged-in users are notified that the system is going down and,  within
           the last five minutes of TIME, new logins are prevented.
    
           TIME  may  have  different  formats, the most common is simply the word
           'now' which will bring the system down immediately.  Other  valid  for-
           mats  are  +m,  where m is the number of minutes to wait until shutting
           down and hh:mm which specifies the time on the 24hr clock.
    
           Once TIME has elapsed, shutdown sends a request to the  init(8)  daemon
           to bring the system down into the appropriate runlevel.
    
           This is performed by emitting the runlevel(7) event, which includes the
           new runlevel in the RUNLEVEL environment variable as well as the previ-
           ous  runlevel  (obtained from the environment or from /var/run/utmp) in
           the PREVLEVEL variable.  An additional INIT_HALT variable may  be  set,
           this will contain the value HALT when bringing the system down for halt
           and POWEROFF when bringing the system down for power off.
    
    
    

    OPTIONS

           -r     Requests that the system be rebooted after it has  been  brought
                  down.
    
           -h     Requests  that  the system be either halted or powered off after
                  it has been brought down, with the choice as to which left up to
                  the system.
    
           -H     Requests  that  the  system  be halted after it has been brought
                  down.
    
           -P     Requests that the system  be  powered  off  after  it  has  been
                  brought down.
    
           -c     Cancels  a  running  shutdown.   TIME is not specified with this
                  option, the first argument is MESSAGE.
    
           -k     Only send out the warning messages and disable  logins,  do  not
                  actually bring the system down.
    
    
    

    ENVIRONMENT

           RUNLEVEL
                  shutdown  will  read  the current runlevel from this environment
                  variable if set in preference to reading from /var/run/utmp
    
    
    

    FILES

           /var/run/utmp
                  Where the current runlevel will be read  from;  this  file  will
                  also be updated with the new runlevel.
    
    
    

    REPORTING BUGS

           Report bugs at <https://launchpad.net/upstart/+bugs>
    
    
    

    COPYRIGHT

           Copyright (C) 2009 Canonical Ltd.
           This is free software; see the source for copying conditions.  There is
           NO warranty; not even for MERCHANTABILITY or FITNESS FOR  A  PARTICULAR
           PURPOSE.
    
    
    

    SEE ALSO

           runlevel(7) init(8) telinit(8) reboot(8)
    
    
    

    Upstart 2009-07-09 shutdown(8)

    
    
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