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Changing hostname in linux

To change the hostname in RHEL 9.2 or a similar version, you can follow these steps:

1. Open a terminal window or connect to your RHEL operating system via SSH. You can use Putty or a similar client for an SSH connection.
2. Log in as the root user
3. Check the current hostname by running the following command:

hostnamectl

This command will display the current hostname and other system information. Since this is a new machine, it doesn't have a static hostnamectl configured yet.

4. To change the hostname, use the hostnamectl command with the set-hostname option, followed by the new hostname you want to set. For example, if you want to change the hostname to dbdocs, run the following command:

sudo hostnamectl set-hostname dbdocs

You may need to enter your password to authorize the command.

5. After executing the hostnamectl command, you can verify the change by running hostnamectl again: Changing Hostname in Linux

One approach to consider is using the sysctl command , which enables you to modify the kernel parameter for the transient name without requiring a system reboot. Here's an example of how to utilize this method

sudo sysctl kernel.hostname=dbdocs

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