Tecadmin published a tutorial about setting up a server with Ubuntu Linux 20.04 LTS
Initial Server Setup with Ubuntu 20.04 LTS (Focal Fossa)
In this tutorial, we are assuming that you already have fresh installed Ubuntu Ubuntu 20.04 LTS (Focal Fossa) server. We recommend using LTS version of Ubuntu for your servers like Ubuntu 20.04 LTS (Focal Fossa). Now after installing Ubuntu server 20.04 server, proceed for the post-installation steps on your server. This tutorial includes steps which are useful for configuring for a server to apply basic security of the server.
Initial Server Setup with Ubuntu 20.04 LTS (Focal Fossa)