systemd 245
Oct 10, 2016
Aliases: fastboot(8), fastboot(8), fasthalt(8), halt(8), poweroff(8), reboot(8)
systemd-sysv
system and service manager - SysV links
systemd
system and service manager
upstart-sysv
event-based init daemon - SysV links
runit-init
system-wide service supervision (as init system)
sysvinit-core
System-V-like init utilities
systemd-sysvcompat
sysvinit compat for systemd
sysvinit
Linux System V Init
systemd-sysvinit
System V init tools
NAME
shutdown - Halt, power-off or reboot the machine
SYNOPSIS
| shutdown [OPTIONS...] [TIME] [WALL...] |
DESCRIPTION
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.
OPTIONS
The following options are understood:
--help
Print a short help text and exit.
-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
Do not halt, power-off, reboot, just write wall message.
--no-wall
Do not send wall message before halt, power-off, 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".
EXIT STATUS
On success, 0 is returned, a non-zero failure code otherwise.
