How to Set or Change Hostname on Rocky Linux 9

To change the hostname on Rocky Linux 9, follow the steps below.

Step 1 : Check the current hostname using the following command:

hostname

Step 2 : Set the new hostname using the following command:

sudo hostnamectl set-hostname server-01

Step 3 : Verify the change by checking the hostname again:

cat /etc/hostname

Step 4 : Open the /etc/hosts file to update the new hostname:

sudo nano /etc/hosts

In the file, locate the line containing the old hostname and replace it with the new one (e.g., server-01).

Step 5 : Reboot your system for the changes to take effect:

sudo reboot

Congratulations, you have successfully set or changed the hostname on Rocky Linux 9.