GNU/Linux Debian Bullseye Xinput QuickStart Guide
How to Install and Getting Started with xinput Command Line Tool on Debian Bullseye 11.x GNU/Linux desktop – Step by step Tutorial.
And xinput for Debian 11 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 Debian 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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