In Linux-based operating systems, setting or changing the system’s hostname is a straightforward task. With just a few commands, you can customize your server’s identity as you wish. This guide will provide step-by-step instructions on how to change the hostname on a CentOS operating system.

Step 1: Check the Current Hostname

First, use the following command to check your current hostname:

hostnamectl

This command will list the current hostname and other related information on the system.

Step 2: Set the New Hostname

To set a new hostname, use the command below. Replace "server.domain.com" with your preferred hostname:

hostnamectl set-hostname server.domain.com

This command sets the hostname to "server.domain.com." You can customize it as you like.

Step 3: Verify the Changes

To confirm that the new hostname is set correctly and there are no errors, run:

hostnamectl

This command will display the new hostname along with other system information. If your new hostname is shown correctly, the process is complete.

You have now successfully changed the hostname on your CentOS operating system! You can identify and manage your server with the new hostname.

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