Changing System Hostname

Get the hostname of the computer:

      hostnamectl

  Set the hostname of the computer:

      sudo hostnamectl set-hostname "hostname"

  Set a pretty hostname for the computer:

      sudo hostnamectl set-hostname --static "hostname.example.com" && sudo hostnamectl set-hostname --pretty "hostname"

  Reset hostname to its default value:

      sudo hostnamectl set-hostname --pretty ""