reboot [OPTION]...  [REBOOTCOMMAND]

       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 (with REBOOTCOMMAND argument passed)
       and directly reboots the system.  Otherwise  this  simply  invokes  the
       shutdown(8) tool with the appropriate arguments without passing REBOOT-
       COMMAND argument.

       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 <>

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