How to Find Mouse Button ID on Ubuntu 20.04 LTS

Finding Button

2. 2. Installing X11 Utils

   Then Install X11 Utils Package
   With:

   sudo apt install x11-utils

   Authenticate with the User Admin Pass.
   If Got “User is Not in Sudoers file” then see: How to Enable sudo.

3. 3. Running Xev

   Then Run Xev CLI Tool
   Simply with:

   xev

4. 4. Finding Button

   Finally, Click on the Xev Window
   Like this:

   
   On the Terminal Window you Find the Button ID: