Set hostname (FQDN & short name) in CentOS 6.x

To update system short name. Edit /etc/sysconfig/network and update the HOSTNAME field to the desired short-name.

HOSTNAME=node1

To update the systems fully qualified domain name. Edit /etc/hosts and insert a new entry following the notation of (host_ip // FQDN // short-name).
In our example:

• host_ip = 192.168.0.2 (Yours will be different)
• FQDN = node1.mydomain.local
• short-name node1

192.168.0.2 node1.mydomain.local node1