In order to change the your CentOS or Cloudlinux hostname permanently, you need to edit two files. The files are
- /etc/sysconfig/network
- /etc/hosts
Prior to changing the hostname, it is wise to check the existing hostname.
1. To do this issue the following command after SSH to you server
hostname
For example, my hostname is “host.domain.net”
2. Once completed, edit “/etc/sysconfig/network” file by issuing the following command
nano /etc/sysconfig/network
The example output as below,
NETWORKING="yes" NETWORKING_IPV6="no" GATEWAYDEV="eth0" HOSTNAME=host.domain.net DOMAINNAME=domain.net
3. Look for “HOSTNAME=host.domain.net”, and change to your desire hostname and save the file. Take note on the “hostname” format. It must be fully qualified domain name (FQDN).
4. Next, edit “/etc/hosts” file by issuing the following command
nano /etc/host
The example output as below,
127.0.0.1 localhost 88.88.88.88 host.domain.net
5. Again, look for “host.domain.net”, and change to your desire hostname as above and save the file.
6. Finally, and then rebooting the system
reboot