I'm currently messing with a orangepi R1 - it's an arm hf board that the developer has supplied an image for. It's allegedly Ubuntu server but 15.04 (I have my doubts that it's an actual Ubuntu server build since there's a ton of lxde packages floating around), and I'd like to get it up to a modern version of Ubuntu.
If it was x86, I could set up the old version repos, and do a release update through the versions or do a fresh install. There's no old releases repo for http://ports.ubuntu.com/ubuntu-ports/ - which is what this uses.
Is there any way to get this up to a modern LTS version of Ubuntu?