shutdown
Purpose
Terminate all processes and shut down (or reboot) the system.
Syntax
shutdown [options] time [ messages ]
Options
-t seconds specifies the time between the message and the kill signal.-h halts the system after terminating all the processes.-r reboots the system after terminating all the processes.-f performs a fast reboot.-k sends warning messages but does not shut down the system.-c cancels a shutdown that’s in progress.
Description
The shutdown command (the full pathname is /sbin/shutdown ) brings down the Linux system in an orderly way. You must specify a time when shutdown begins; use the keyword now to shutdown immediately. You must be logged in as root to run the shutdown command.