idroot published a tutorial about installing ADB and Fastboot on Ubuntu 20.04 LTS.
How To Install ADB and Fastboot on Ubuntu 20.04 LTS
In this tutorial we will show you how to install ADB and Fastboot on Ubuntu 20.04 LTS, as well as some extra required package by Android
How To Install ADB and Fastboot on Ubuntu 20.04 LTS - idroot