How to Set or Change Hostname on Ubuntu 23.10

To change the hostname on Ubuntu 23.10, follow these steps:

Step 1 : Start by checking the current hostname using the command:

hostname

Step 2 : Use the following command to set the new hostname (replace "server-01" with your desired hostname):

sudo hostnamectl set-hostname server-01

Step 3 : Verify the change by checking the updated hostname with:

cat /etc/hostname

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

sudo nano /etc/hosts

Inside the file, locate the line with the old hostname and replace it with the new one.

Step 5 : Reboot your system to apply the changes:

sudo reboot

Congratulations! You have successfully set or changed the hostname on your Ubuntu 23.10 system.