In this post, i will show you how to change the hostname on linux CentOS 5.5. Reboot is required for both steps.
Option 1. Change Hostname using command shell:
[root@server ~]# vi /etc/sysconfig/network NETWORKING=yes NETWORKING_IPV6=no HOSTNAME=server.intranet.local
Change the HOSTNAME=your_preferred_hostname
Option 2. Change Hostname using GUI
Type Setup as below and Press Enter
[root@server ~]# setup
Select Network Configuration –> Edit DNS Configuration –> Hostname