How to Set or Change Hostname on CentOS Stream 9

To change the hostname on CentOS Stream 9, follow these steps.

Step 1 : Check Current Hostname

hostname

Step 2 : Set the New Hostname (e.g., server-01)

sudo hostnamectl set-hostname server-01

Step 3 : Verify the New Hostname

cat /etc/hostname

Step 4 : Reboot the System

sudo reboot

Congratulations! You have successfully set or changed the hostname on CentOS Stream 9. Your system should now reflect the updated hostname after the reboot.