Existing tools which support pairing of Logitech Unifying devices rely on the user to define the receiver's USB device, which may result in trial and error usage.
Unipair searches automatically for the receiver, and waits for the connected input device to be recognized by the system.
sudo ./unipair Searching for the Logitech Receiver... Found USB Receiver: /dev/hidraw1 Switch your device OFF and press ENTER to continue. Waiting - switch your device ON or press CTRL+C to exit. ....... Detected new device Node: /dev/hidraw4 Subsystem: hidraw
The program requires libudev to compile.