Logitech does not have an official Unifying software for Linux. However, a simple Google search will take you to Solaar.
Solaar is a Linux device manager for Logitech’s Unifying peripherals and as I have learned since switching to Ubuntu, installation could not get any easier.
To install Solaar in Ubuntu, launch terminal and run the following command: sudo apt-get solaar-gnome3
Once installed, launch the application. It will prompt you if the Unifying receiver is plugged in when the software was being installed and will ask you to unplug it and plug it back in for the application to work properly.
Solaar automatically detects if there are any devices already paired with the receiver. If you need to pair a new device, highlight Unifying Receiver and click the Pair new device button. After a second or two, the device will appear in the list on the left and you are all set.
The user interface of the official Unifying software for Windows becomes convoluted compared to Solaar’s. Logitech can definitely learn something from this software.