Howtoforge published a tutorial about installing Minecraft Server on Ubuntu 20.04 LTS.
How to install Minecraft Server on Ubuntu 20.04 LTS
Minecraft is an open world and sandbox video game developed by Mojang Studios. With Minecraft, you can build anything you can imagine with unlimited resources in Creative mode. It allows you to play online with friends as well as in single-player mode. It is one of the best video games around the world. You can create your own Minecraft server to play with your friends and play together.
How to install Minecraft Server on Ubuntu 20.04 LTS