Refer: https://linuxconfig.org/how-to-install-minecraft-on-ubuntu-18-04-bionic-beaver-linux
Download Minecraft Package
The first step is to download the official minecraft package. Open up terminal and enter the following wget command to download the Minecraft.deb package:
$ wget -o ~/Minecraft.deb https://launcher.mojang.com/download/Minecraft.deb
Install Minecraft.deb package
The easiest way is to install the previously downloaded Minecraft.deb package is by using gdebi tool. First make sure that gdebi command is available on your system:
$ sudo apt install gdebi-core
Install the Minecraft.deb package:
$ sudo gdebi ~/Minecraft.deb