Ubuntu set hostname permanently (computer name) command

To set the hostname (computer name) of an Ubuntu system permanently, you need to modify two files: /etc/hostname and /etc/hosts.

Here’s how to set the hostname in Ubuntu:

1. Open the terminal.
2. Use the following command to open the /etc/hostname file in a text editor:

3. Enter the desired hostname in the file and save the changes by pressing Ctrl + O and then Ctrl + X.
4. Open the /etc/hosts file:

5. Modify the file to include the following line, replacing new_hostname with your desired hostname:

6. Save the changes and close the file.
7. Finally, use the following command to reboot the system for the changes to take effect:

Once the system has restarted, you can verify the hostname has been set permanently by using the hostname command.