Change ip-address Permanently

Under the /etc/sysconfig/network-scripts directory, you’ll see file for every network interface on your system. For example, if your interface is “eth0”, you’ll see ifcfg-eth0 file under this directory.

Modify the ifcfg-eth0 file and change the IPADDR field accordingly as shown below to change the ip-address.

# vi /etc/sysconfig/network-scripts/ifcfg-eth0
DEVICE="eth0"
BOOTPROTO=none
NM_CONTROLLED="yes"
ONBOOT=yes
TYPE="Ethernet"
UUID="11111-2222-3333-4444"
IPADDR=192.168.1.2
PREFIX=24
GATEWAY=192.168.1.1
DEFROUTE=yes
IPV4_FAILURE_FATAL=yes
IPV6INIT=no
NAME="System em1"
HWADDR=DD:BB:DD:AA:11:55

Source: http://www.thegeekstuff.com/2013/10/change-hostname-ip-address/

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