Logitech's Unifying technology is awesome. Plug the USB receiver in the computer, power on your keyboard or mouse and it is ready for use! Well, the devices themselves do work, but software to attach new devices to a single receiver (or detach bound devices) is only available for Mac OS X and Windows. ltunify is a program resulting from the gathered knowledge on the Logitech HID++ protocol. It allows you to pair additional devices like keyboards and mice to your Unifying receiver, unpair existing devices and list information about connected devices. *** IMPORTANT *** - READ THE DOCS in /usr/doc/ltunify-0.2 Be sure you READ the information at the TOP of the /etc/udev/rules.d/42-logitech-unify-permissions.rules In /usr/doc/ltunify-0.2 be sure to read the README.txt for additional instructions on pairing. If you need to always have one device paired and want it paired on startup, place these two commands in rc.local exactly as you see them in this order; ltunify unpair 1 ltunify pair