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/
