Shutdown

Used to shutdown a machine. shutdown requires two arguments: a command and a time.

Common Flags and arguments

-h will halt the machine
-r will reboot the machine
-k will send out a message that the machine will reboot, but not actually do it

now is a valid time

shudown -h now will halt the machine immediately; all pending writes performed, all disks sync'd and all users will be logged out

Compare to init