Change Redhat/ CentOS hostname permanently

FREQUENTLY ASKED QUESTIONS  (Linux Networking)
Q: How to change hostname permanently in Redhat/CentOS ?
This post covers changing the hostname permanently in Fedora, CentOS, Redhat, etc.

The default hostname will be look like "localhost.localdomain" or something like that.

Step1: Edit the network configuration file located in "/etc/sysconfig/"

[root@server ~#]cd /etc/sysconfig/

[root@server ~#]vi network

#in the 3rd line edit and specify the new hostname of the system.

HOSTNAME=webserver

Step2: Restart the system to take effect the new hostname.

[root@server ~#]reboot

Step3: After restarting the system verify the new hostname

[root@server ~#]hostname

webserver


Note: You can temporary change hostname by the below command
[root@server ~#]hostname dbserver
(this changes the current hostname to "dbserver" untill reboot the system.

LABELS: CentOS, extra-tips, FAQ, Fedora, linux, Linux Commands, Redhat