Hello Linux Geeksters. As you may know, Synapse is a launcher written in Vala that enables the users to easily launch their favorite apps or open the needed files. Among others, it searches for desktop files, allows the users to play or set to queue tracks in Banshee and Rhytmbox, it has support for commands (as a virtual terminal) and enables the users to easily suspend or hibernate the computer.

The latest version available is Synapse 0.2.99, which is still under development.
In this article I will show you how to install Synapse 0.2.99 on Ubuntu 14.04 Trusty Tahr, Ubuntu 13.10 Saucy Salamander, Ubuntu 12.10 Quantal Quetzal, Linux Mint 17 Qiana, Linux Mint 16 Petra, Linux Mint 14 Nadia, Pinguy OS 14.04, Elementary OS 0.3 Isis and Elementary OS 0.2 Luna.
Because it is available via PPA, installing Synapse 0.2.99 on the listed Ubuntu, Linux Mint, Pinguy OS and Elementary OS systems is easy. All you have to do is add the ppa to your system, update the local repository index and install the synapse package. Like this:
$ sudo add-apt-repository ppa:synapse-core/testing
$ sudo apt-get update
$ sudo apt-get install synapse
Optional, to remove synapse, do:
$ sudo apt-get remove synapse
Or, you can also disable the Synapse PPA, remove synapse and downgrade all the packages that got updated via the ppa, to their versions from the official repositories, via ppa-purge:
$ sudo apt-get install ppa-purge
$ sudo ppa-purge ppa:synapse-core/testing