Changing a hostname permanently in Ubuntu

Question

I want to create a shell script that can change the hostname of my Ubuntu permanently. Whenever I use the hostname New_hostname command, it returns to the original hostname after I restart the machine.

I found out that the only way I can change this permanently is by modifying the file in /etc/hostname and save it. Is there some way I can do this using a shell script only? I also have a password.

Answer 1

The hostnamectl combines setting the hostname via the hostname command and editing /etc/hostname. Unfortunately, editing /etc/hosts still has to be done separately.

hostnamectl set-hostname <new-hostname>