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HTML rendering created 2025-09-06 by Michael Kerrisk, author of The Linux Programming Interface. For details of in-depth Linux/UNIX system programming training courses that I teach, look here. Hosting by jambit GmbH. |
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NAME | SYNOPSIS | DESCRIPTION | OPTIONS | EXIT STATUS | COMPATIBILITY | SEE ALSO | COLOPHON |
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SHUTDOWN(8) shutdown SHUTDOWN(8)
shutdown - Halt, power off or reboot the machine
shutdown [OPTIONS...] [TIME] [WALL...]
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.
The time string may either be in the format "hh:mm" for
hour/minutes specifying the time to execute the shutdown at,
specified in 24h clock format. Alternatively it may be in the
syntax "+m" referring to the specified number of minutes m from
now. "now" is an alias for "+0", i.e. for triggering an immediate
shutdown. If no time argument is specified, "+1" is implied.
Note that to specify a wall message you must specify a time
argument, too.
If the time argument is used, 5 minutes before the system goes
down the /run/nologin file is created to ensure that further
logins shall not be allowed.
The following options are understood:
--help
Print a short help text and exit.
-H, --halt
Halt the machine.
-P, --poweroff
Power the machine off (the default).
-r, --reboot
Reboot the machine.
-h
The same as --poweroff, but does not override the action to
take if it is "halt". E.g. shutdown --reboot -h means
"poweroff", but shutdown --halt -h means "halt".
-k
Do not halt, power off, or reboot, but just write the wall
message.
--no-wall
Do not send wall message before halt, power off, or reboot.
-c
Cancel a pending shutdown. This may be used to cancel the
effect of an invocation of shutdown with a time argument that
is not "+0" or "now".
--show
Show a pending shutdown action and time if there is any.
Added in version 250.
On success, 0 is returned, a non-zero failure code otherwise.
The
shutdown command in previous init systems (including sysvinit)
defaulted to single-user mode instead of powering off the machine.
To change into single-user mode, use systemctl rescue instead.
systemd(1), systemctl(1), halt(8), wall(1)
This page is part of the systemd (systemd system and service
manager) project. Information about the project can be found at
⟨http://www.freedesktop.org/wiki/Software/systemd⟩. If you have a
bug report for this manual page, see
⟨http://www.freedesktop.org/wiki/Software/systemd/#bugreports⟩.
This page was obtained from the project's upstream Git repository
⟨https://github.com/systemd/systemd.git⟩ on 2025-08-11. (At that
time, the date of the most recent commit that was found in the
repository was 2025-08-11.) If you discover any rendering
problems in this HTML version of the page, or you believe there is
a better or more up-to-date source for the page, or you have
corrections or improvements to the information in this COLOPHON
(which is not part of the original manual page), send a mail to
[email protected]
systemd 258~rc2 SHUTDOWN(8)
Pages that refer to this page: last(1@@util-linux), login(1), wall(1), reboot(2), nologin(5), boot(7), systemd.directives(7), systemd.index(7), kexec(8), poweroff(8)
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HTML rendering created 2025-09-06 by Michael Kerrisk, author of The Linux Programming Interface. For details of in-depth Linux/UNIX system programming training courses that I teach, look here. Hosting by jambit GmbH. |
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