$ sudo vi /etc/sysconfing/network-scripts/ifcfg-eth0
Configuration for Dynamic IP
DEVICE=”eth0″
BOOTPROTO=dhcp
NM_CONTROLLED=”yes”
ONBOOT=yes
Static IP Configuration
DEVICE=”eth0″
BOOTPROTO=static
NM_CONTROLLED=”yes”
ONBOOT=yes
TYPE=”Ethernet”
IPADDR=192.168.1.2
PREFIX=24
GATEWAY=192.168.1.1
DEFROUTE=yes
DNS1=192.168.1.10
DNS2=192.168.1.20
$ sudo service network restart