How to Change Hostname on CentOS or Cloudlinux?

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

 


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