NAME
shutdown - bring the system down
SYNOPSIS
shutdown [OPTION]... TIME [MESSAGE]
...
OPTIONS
-r Requests that the system be rebooted after it has been brought
down.
-h Requests that the system be either halted or powered off after
it has been brought down, with the choice as to which left up to
the system.
-H Requests that the system be halted after it has been brought
down.
-P Requests that the system be powered off after it has been
brought down.
-c Cancels a running shutdown. TIME is not specified with this
option, the first argument is MESSAGE.
-k Only send out the warning messages and disable logins, do not
actually bring the system down.
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