Recently released Ubuntu 18.04. So I want to show how to change the hostname from Ubuntu 18.04. This is not the same as Ubuntu old version. It’s some critical for the new user.

★ How To Configure Static IP address On Ubuntu 18.04

★ How To Install Zabbix Server On Ubuntu 18.04

Step #01: Open hosts file via nay editor.

root@technologyrsslocal:~# vi /etc/hosts

Insert your hostname then save file. Esc : wq press Enter.

Step #02: Then open hostname file.

root@technologyrsslocal:~# vi /etc/hostname

Insert your hostname then save file. Esc : wq press Enter.

Step #03: Change preserve hostname false option.

root@technologyrsslocal:~# vi /etc/cloud/cloud.cfg

Change false option

preserve_hostname: false

Change to

preserve_hostname: true

Then save it.

reboot your machine otherwise can’t change the hostname on Ubuntu 18.04.

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