GNU/Linux Ubuntu 20.04 Installing Logitech Trackball Driver Guide
Hi! The linked Tutorial shows you Step-by-Step How to Install Logitech Trackball Mouse Software in Ubuntu 20.04 Focal LTS GNU/Linux.
First, Solaar for Ubuntu is a manager for many Logitech Keyboards, Mice, and Trackpads that connect wirelessly to a USB Unifying, Bolt, Lightspeed, or Nano receiver; connect directly via a USB Cable; or connect via Bluetooth.
It is able to Pair/Unpair Devices to the Receiver, and for most devices read Battery Status. Solaar can also control some changeable Settings of Devices, such as Scroll Wheel direction and function Key behavior.
Finally, Solaar comes in two flavors, Command-Line and GUI. Both are able to List the Devices Paired to a Unifying Receiver, show Detailed Info for each Device, and also Pair/Unpair supported Devices with the Receiver.
Installing Logitech Trackball Driver
How to Install Logitech Trackball Mouse Software in Ubuntu