GNU/Linux Deepin 20 Installing NVIDIA GTX 1660 Driver Guide
Hi! The tutorial provides a comprehensive, step-by-step guide on How to Install the NVIDIA GeForce GTX 1660 Driver in Deepin GNU/Linux 20.x Desktops.
And the NVIDIA GTX 1660 Deepin Linux 20 Driver Setup is Simple and involves only the Execution of one Shell Commands.
Finally, with the nvidia-settings Tool you can configure Brightness, Gamma, XVideo attributes, Temperature, and OpenGL.

1. Terminal QuickStart
How to QuickStart with Command Line on Deepin Linux
First, Update the Apt Repo Sources with:
sudo apt update
Authenticate with the User Admin Pass.
If Got “User is Not in Sudoers file” then see: How to Enable sudo.