I've followed as many online posts as I can. I've upgraded Java and installed other stuff (bear in mind I'm a complete Linux newbie) but now I have to start Serviio manually and I can't add anything to my library. I mentioned this on Reddit and got a reply from a guy (and two others by PM) saying they'd had the same problem. The Serviio sub on Reddit is dead BTW.
Whenever you mention Serviio on Reddit everybody says "just use Plex" but Serviio is superior in every way... except for Linux! Sadly I'm going to have to accept a worse product because a simple "idiots-guide" script doesn't exist AFAIK
PS it's almost worth sticking with Windows just for Serviio but.... not enough.