PLS confer me full detail step by step
Answers:
1. Login to the device as root (or SU to root)
2. Using your favorite schoolbook editor modify the /etc/sysconfig/network directory.
3. Make your change and recover them.
4. Reboot
5. Enjoy! ;-)
You can also use redhat-configure-network which I conjecture is contained by /usr/bin, long time since I looked at red headdress.