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Change Server Name on Ubuntu

When we install ubuntu on our System, it shows as userName@serverName

The default server/computer name was set when you were installing Ubuntu. You can easily change it to whatever you want in both Desktop & Server by editing the hosts and hostname files.

To do this temporarily until next boot, follow the instructions:

Press Ctrl +Alt + t on keyboard to open the terminal. When it opens, run the below command:

sudo hostname NEW_NAME_HERE

This will temporarily change the hostname until next reboot. The change won’t be visible immediately in your current terminal. You can start a new terminal to see the new temporary hostname.

To change the name permanently,
run the following command to edit the host files:

sudo gedit /etc/hostname /etc/hosts

For Ubuntu server without a GUI, run sudo vi /etc/hostname and sudo vi /etc/hosts and edit them one by one. In both files, change the name to what you want and save them.

Finally, restart your computer to apply the changes.