Install eXe Learning from PPA

Add PPA to sources list and update Apt cache.

$ sudo add-apt-repository ppa:exelearning/exelearning

$ sudo apt-get update

Check that Intef eXe Learning is now available on your distribution, and install

$ apt-cache search intef-exe

$ apt-cache show intef-exe

$ sudo apt-get install intef-exe

eXeLearning has been installed!

https://help.launchpad.net/Packaging/PPA/InstallingSoftware