First go into /etc/udev/rules.d/
Vi and Vim commands
$ sudo vi /etc/udev/rules.d/70-persistent-net.rules
For example, above I want to delete the old eth0 entry and then find the eth1 device I am still using but wish to rename and change the NAME parameter from eth1 back to eth0.
So make your adjustments or removals in 70-persistent-net.rules and then go to /etc/sysconfig/network-scripts where you will alter and rename the ifcfg-eth1 file.
$ sudo vi /etc/sysconfig/network-scripts/ifcfg-eth1
|eth1 renamed to eth0|
$ sudo mv /etc/sysconfig/network-scripts/ifcfg-eth1 /etc/sysconfig/network-scripts/ifcfg-eth0
Or write a new file completely with contents similar to below
Which are typical parameters for someone using a static IP address on a wired ethernet card. Finally, issue the command
$ sudo service network restart
Or reboot your system to enable the new named device.