GNU/Linux Mint20 Xinput QuickStart Guide
How to Install and Getting Started with xinput Command Line Tool on Mint 20.x Ulyana/Ulyssa/Uma/Una GNU/Linux desktop – Step by step Tutorial.
And xinput for Mint 20 is a Utility to configure and test X input Devices, such as Mouses, Keyboards, and Touchpads
Most noteworthy this Guide make use also of the evdev and some others CLI Utilities.

1. Launching Terminal
How to QuickStart with Command Line on Mint GNU/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.
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