NAME

       shutdown, reboot, poweroff - poweroff or reboot the system

SYNOPSIS

       /usr/sbin/shutdown [-h] [-r] [-f] [-F] [now]
       /usr/sbin/reboot [-w] [-f] [-n]
       /usr/sbin/halt [-w] [-f] [-n]
       /usr/sbin/poweroff [-w] [-f] [-n]

DESCRIPTION

       Shutdown  is  a program to poweroff or reboot the system that maintains some compatibility
       with original SysV-init halt, poweroff, reboot and shutdown programs.  These programs  are
       expected by some initscripts, graphical desktop environments and tools like acpi.
       When  called  as  shutdown, halt or poweroff without options, runit(8) is told to shutdown
       the system and poweroff.
       When called as reboot runit(8) is told to reboot the system.
       When runit(8) is not the current init system this program sends data  in  the  appropriate
       format to perform the requested action to the initctl pipe, if it exists.

SHUTDOWN OPTIONS

       -h     Shutdown  the  system  and  poweroff;  this is the default. Actually this option is
              ignored and can be omitted, it is maintained only for backward  compatibility  with
              Sysv's shutdown.

       -r     Reboot the system instead of poweroff.

       -f     Write  a /fastboot flag file. The program or the scripts responsible for the system
              boot task can test for this file when the system comes up again and decide to  skip
              fsck.  The program or the scripts that perform the boot task also need to take care
              of the removal of the flag file.

       -F     Write a /forcefsck flag file. The program or the scripts responsible for the system
              boot  task  can test for this file when the system comes up again and decide to run
              fsck with a 'force' flag.  The program or the scripts that perform  the  boot  task
              also need to take care of the removal of the flag file.

       The  original  Sysv  shutdown  implementation allowed for an optional time parameter for a
       delayed shutdown and another one for a shutdown message.  The runit shutdown program  does
       not support any extra argument after the options, except for 'now'.

HALT OPTIONS

       -f     Invoke  sync(),  then  force  an  unsafe  reboot  or  poweroff  immediately without
              signaling the init system.  This will likely result in an unclean shutdown and  can
              cause  data loss or corruption.  When runit is init, this option is a No-Op and all
              other options are ignored. See #899246

       --force
              Invoke sync(),  then  force  an  unsafe  reboot  or  poweroff  immediately  without
              signaling  the init system.  This will likely result in an unclean shutdown and can
              cause data loss or corruption.  This option works regardless of  the  running  init
              system.

       -w, --wtmp-only
              No-Op, maintained for compatibility with initscripts. See #919699

       -n     Write  a  /etc/runit/nosync  flag  file.  If this file exists runit does not invoke
              sync() before reboot or poweroff.  The /etc/runit/nosync flag file is also  checked
              when this program is called with -f or --force

       Any other option given is ignored except that a warning is printed.

SWITCHING FORM OTHER INIT SYSTEMS

       This  program  maintains  a compatibility layer with SysV-init's initctl pipe according to
       the spec described in SysV-init's initctl(5). This allow one to  reboot  the  system  when
       switching from another init to runit-init.
       Currently  only  switching  from systemd and SysV-init is tested but any other init system
       that maintains an initctl pipe compatible with SysV's one should work.

BUGS

       Combining flags, like halt -wf is not supported, all merged short options will be ignored.

SEE ALSO

       init(8)

                                         August 30, 2022                              SHUTDOWN(8)