halt
Purpose
Terminate all processes and halt the system (you must log in as root ).
Syntax
halt [options]
Options
-n does not flush out in-memory buffers to disk before halting the system.-f forces a halt without calling the /sbin/shutdown command.-i shuts down all network interfaces before halting the system.
Description
The halt command lets the super user (root) terminate all processes and halt the system. The halt command invokes /sbin/shutdown with the -h option.