How to change your hostname Centos6 and Centos7

Changing your server hostname must be the first step you do when you're getting a new installation for a webserver or control panel. here's how we can change simply it.

Centos6

You could change the hostname by this simple command

 # hostname host.name.com

which is host.name.com is the hostname you want to set

Centos7

on this OS it's a little bit complicated

 # sudo nano /etc/sysconfig/network

then you have to write this line on the file

 HOSTNAME=host.name.com

then save and exit

You may need to restart the network on server/machine though this command

# /etc/init.d/network restart

#reboot

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Don't forgot to add your hostname to hosts file, by the following command

# nano /etc/hosts

xxx.xxx.xxx.xxx host.name.com 

the ip of the server followed by the hostname then save the exit the file