Open up a terminal window and type:

gpg --keyserver keyserver.ubuntu.com --recv-key 18F3EEF7  

Then type this:

gpg -a --export 18F3EEF7 | sudo apt-key add -

It should say 'OK'.

 

Open up a terminal window if you haven't already and type:

sudo nano /etc/apt/sources.list  

(or alternatively, use any text editor you want)

Go to the end of the file and add this:

For Ubuntu 12.04:

deb http://deb.openanalytics.eu precise main

For Ubuntu 12.10:

deb http://deb.openanalytics.eu quantal main

For Debian 7:

deb http://deb.openanalytics.eu wheezy main

Now save and close the file (in nano: ctrl+O and ctrl+X).

Finally, run this command in the terminal window:

sudo apt-get update  

Congratulations! Now you're ready to install the packages from our repository.