shutdown — Halt, power-off or reboot the machine
shutdown [OPTIONS...] [now] [WALL...]
shutdown may be used to halt, power-off or reboot the machine.
The first argument should be the string now which however is ignored by this implementation. Optionally, this may be followed by a wall message to be sent to all logged-in users before going down.
The following options are understood:
--help
Prints a short help text and exits.
-H
, --halt
Halt the machine.
-P
, --poweroff
Power-off the machine (the default).
-r
, --reboot
Reboot the machine.
-h
Equivalent to
--poweroff
, unless
--halt
is
specified.
-k
Don't halt, power-off, reboot, just write wall message.
--no-wall
Don't send wall message before halt, power-off, reboot.