reboot [OPTION]...

       halt [OPTION]...

       poweroff [OPTION]...

       These programs allow a system administrator to reboot, halt or poweroff
       the system.

       When called with --force or when in runlevel 0 or 6, this tool  invokes
       the reboot(2) system call itself and directly reboots the system.  Oth-
       erwise this simply invokes the shutdown(8) tool  with  the  appropriate

       Before  invoking  reboot(2), a shutdown time record is first written to

       -f, --force
              Does not invoke shutdown(8)  and  instead  performs  the  actual
              action you would expect from the name.

       -p, --poweroff
              Instructs the halt command to instead behave as poweroff.

       -w, --wtmp-only
              Does  not  call  shutdown(8)  or  the  reboot(2) system call and
              instead only writes the shutdown record to /var/log/wtmp

              Outputs slightly more verbose messages  when  rebooting,  useful
              for debugging problems with shutdown.

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

              Where the current runlevel will be read  from;  this  file  will
              also  be  updated  with  the runlevel record being replaced by a
              shutdown time record.

              A new runlevel record for the shutdown time will be appended  to
              this file.

       Written by Scott James Remnant <scott@netsplit.com>

Upstart                           2009-07-09                         reboot(8)
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