HowTo Change Hostname in Linux

To check for current hostname:

1

hostname

Change hostname

1	hostname new_hostname

Make change permanent on reboot:

• Debian/Ubuntu: edit or make changes on this file /etc/hostname
• RHEL/CentOS: edit or make changes on this file /etc/sysconfig/network

Important:

Make sure to check or update new hostname in /etc/hosts as some running application could be using hostname values in there. Test running applications as well or try to reload/restart if possible (ex: apache).