Linux "shutdown" Command Line Options and Examples

Halt, power-off or reboot the machine

shutdown may be used to halt, power-off or reboot the machine. The first argument may be a time string (which is usually "now"). Optionally, this may be followed by a wall message to be sent to all logged-in users before going down.

Usage:

shutdown [OPTIONS...] [TIME] [WALL...]

Related Commands

Command Line Options:

--help

Print a short help text and exit.


                            shutdown --help ...

-H

Halt the machine.


                            shutdown -H ...

-P

Power-off the machine (the default).


                            shutdown -P ...

-r

Reboot the machine.


                            shutdown -r ...

-h

Equivalent to --poweroff, unless --halt is specified.


                            shutdown -h ...

-k

Do not halt, power-off, reboot, just write wall message.


                            shutdown -k ...

--no-wall

Do not send wall message before halt, power-off, reboot.


                            shutdown --no-wall ...

-c

Cancel a pending shutdown. This may be used cancel the effect of an invocation of shutdown with a timeargument that is not "+0" or "now".EXIT STATUSOn success, 0 is returned, a non-zero failure code otherwise.


                            shutdown -c ...