Verify the Changes

Step 1: Check the Current Hostname

Before making any changes, it’s important to know the current hostname of your system. This can be done using the `hostnamectl` command. Open a terminal and type:...

Step 2: Change the Hostname

To change the hostname on RHEL 9, you need to edit the `/etc/hostname` file. This file contains the current hostname of your system. Open a terminal and use a text editor (e.g.,` nano`, `vi`, `gedit`) to edit the file:...

Step 3: Update the Hosts File

Next, you need to update the `/etc/hosts` file to reflect the new hostname. This file maps IP addresses to hostnames and is used by the system for hostname resolution. Open the file in a text editor:...

Step 4: Apply the Changes

To apply the new hostname, you can either restart your system or use the hostnamectl command:...

Step 5: Verify the Changes

To verify that the hostname has been changed successfully, you can use the hostnamectl command again:...

How to Change Hostname on RHEL 9 (Red Hat Enterprise Linux 9) – FAQS

Can I change the hostname without restarting the system?...

Conclusion

In conclusion, changing the hostname on RHEL 9 is a straightforward process that can be accomplished by following a few simple steps. By checking the current hostname, editing the /etc/hostname and /etc/hosts files, applying the changes using hostnamectl, and verifying the new hostname, even beginners can successfully change the hostname on their system. Additionally, common questions regarding changing the hostname, such as the impact on network services and applications, the rules for choosing a hostname, and the ability to revert to the previous hostname, are addressed to provide a comprehensive understanding of the topi...