How to uninstall the NVIDIA drivers on Ubuntu 20.04 Focal Fossa Linux - LinuxConfig.org

In this tutorial you will learn how to uninstall the NVIDIA drivers on Ubuntu 20.04 Focal Fossa Linux, hence switch back to the opensource Nouveau Nvidia drivers.
This is a companion discussion topic for the original entry at https://linuxconfig.org/how-to-uninstall-the-nvidia-drivers-on-ubuntu-20-04-focal-fossa-linux