GNU/Linux Xubuntu 20.04 Installing NVIDIA Driver Guide
How to Install NVIDIA Graphics Driver on Xubuntu 20.04 Focal LTS GNU/Linux desktop – Step by step Tutorial.
And the NVIDIA Driver Xubuntu 20.04 Setup is a breeze, requiring just a few straightforward Shell Commands to complete.
Moreover, following the NVIDIA Recommendations is better to use the tested NVIDIA Linux Graphics Driver from the NVIDIA Driver Xubuntu PPA Repository.
Finally, with the nvidia-settings Tool you can configure Brightness, Gamma, XVideo attributes, Temperature, and OpenGL.

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1. Launching Terminal
Open a Terminal Shell emulator window
(Press “Enter” to Execute Commands)Ctrl+Alt+t on desktop
And Update Apt Repository:sudo apt update
Authenticate with the User Admin Pass.
If Got “User is Not in Sudoers file” then see: How to Enable sudo.
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