Ubuntu

Change hostname without a restart

• Last tested on Ubuntu 16.04 (2018-04-23)

1. To permanently change the computer name
   Edit /etc/hostname and /etc/hosts
2. Restart hostname service

   $ systemctl restart systemd-logind.service
   

3. Use hostnamectl with set-hostname flag.

   $ hostnamectl set-hostname NEW_NAME_HERE
   

Snap (package manager)

• Last tested on Ubuntu 20.04 (2022-02-06)