If you’re using Synergy for mouse and keyboard sharing, you may find that it suddenly disappears from Ubuntu. It will show up as installed in the Software Centre, but you won’t be able to remove or reinstall it, and there will be no icon on the unity bar.
If you try running it from the command line using the following command.
You may get an error similar to the following.
no configuration file found
The easiest way to solve this is to download the .deb package from the Synergy website, then open up a terminal and install it from there.
sudo dpkg -i synergy-1.4.10-Linux-x86_64.deb
This will then reinstall it and you should then be able to find the programme listed in the dash home.