How to change the hostname of your Virtual Compute Nodes

Change Linux Virtual Compute Nodes Hostname

Please follow the below steps to change the hostname of your Virtual Compute Node.

Step 1: Log in

Step 2: Check Hostname

To check the current hostname of your server, run the command

# hostname

To change the hostname of your server, type new name followed by hostname

# hostnamectl set-hostname new-hostname

Step 3: Edit the network configuration file

For CentOS

Edit the /etc/hostname file and update hostname:

# vi /etc/hostname

Step 4: Edit the hosts file

Edit the /etc/hosts file and update your old-host-name:

# vi /etc/hosts

Now save and exit the file.

Step 5: Save Hostname permanently

Immediately after executing the previous command, the hostname is changed, but the change will last only until the next reboot. To permanently change the hostname, the next step is to run the following command in your terminal

# cd /etc/one-context.d/

This will take you inside the directory one-context.d

List the contents of the directory by running the following command,

# ls -la

You will see the following result

We need to move the directory 05-hostname to the root folder. For KVM-based servers, you will have a directory as net-15-hostname. To execute this run the following command in the terminal.

# mv 05-hostname /root/

# mv net-15-hostname /root/

Now your hostname is changed permanently.

For cPanel Server Node

Step 1. First follow the above-mentioned steps to change server hostname

Step 2. To change the server’s hostname, use WHM’s Change Hostname interface (WHM >> Home >> Networking Setup >> Change Hostname).

Step 3. Add the following lines into your Server node /etc/sysctl.conf configuration file.

kernel.hostname = hostname.domainname.com

kernel.domainname = domainname.com

Step 4. And execute the command # sysctl -p /etc/sysctl.conf to read and apply the changes of your /etc/sysctl.conf configuration file.