centos man page for ifup

ifup(8) 					      System Administration tools and Daemons						   ifup(8)

NAME
       ifup - bring a network interface up

       ifdown - take a network interface down

SYNOPSIS
       ifup CONFIG [boot]

       ifdown CONFIG

DESCRIPTION
       The  ifup  and ifdown commands may be used to configure (or, respec- tively, deconfigure) network interfaces based on interface definitions
       in the files /etc/sysconfig/network and /etc/sysconfig/network-scripts/ifcfg-<configuration>

       These scripts take one argument normally: the name of the configuration (e.g. eth0). They are called with a second argument of "boot"  dur-
       ing the boot sequence so that devices that are not meant to be brought up on boot (ONBOOT=no, see below) can be ignored at that time.

FILES
       /etc/sysconfig/network

       /etc/sysconfig/network-scripts/ifcfg-<configuration>
	      The file defining an interface.

SEE ALSO
       /usr/share/doc/initscripts-*/sysconfig.txt

								    2009-10-27								   ifup(8)