https://askubuntu.com/questions/113984/is-logitechs-unifying-receiver-supported

# -  - #
# - Install the software - #
sudo apt-get install git gcc;
git clone https://git.lekensteyn.nl/ltunify.git
cd ltunify
make install-home;

# - Logout & login again - #
# - Pair a new device - #
sudo ltunify pair;

# - Unpair devices - #
sudo ltunify unpair mouse

(be sure to have a second device that you can use after detaching your Unifying device!)




# -  - #
# - Install solaar applet for the top menu bar - #
# - You can pair up to 6 devices with one reciver - #
sudo add-apt-repository ppa:trebelnik-stefina/solaar;
sudo apt-get update;
sudo apt-get install solaar;