How do I subscribe to the Universe repository on OSMC?
I’ve only ever done it with a GUI before…
I know it might not answer your question, but I used the instructions at:
http://www.cylindric.net/blog/raspberrypi-adding-sabnzbd-sickbeard-and-couchpotato/
Thanks, Harold…
…but how did you get past the first step? I can’t get the python2.6 to download at all. I even tried manually including the source on my /etc/apt/sources.list
I’ve been wading through tutorial after tutorial trying to get this stuff to work and I’m about to pull my hair out! 
Ah sorry I don’t know it just worked for me…
Is there anything in the comments at the bottom regarding it? I’m really sorry I can’t help in more depth.
Maybe I’ll try it from a clean install. What version of OSMC were you using? What Raspi board?
I’ve had it installed on the original raspberry pi. However I did find that having it on the same machine as media was playing was a bit of a struggle.
I’ve since set up a separate headless Raspbian machine with Sabnzb and sickbeard installed. I have a hard drive shared with OSMC through NFS and it works really well.