There isn't a way to upgrade between OS releases

danrabbit from IRC offered the information below:

As far as I know there are a few issues.

Update manager disables ppas during upgrades. So since we're using ppas it wouldn't work.

It would need to be patched to used lsb_release -u so that it sets the repos to "trusty" and not "freya" (which doesn't exist)

Lewis Goddard: If we were to patch the update manager in Luna, it would be do-able, but there could be a lot of other issues we haven't even seen because it hasn't been done yet.

Launchpad Details: [#LP1486694](https://bugs.launchpad.net/bugs/1486694) Amelia Rose Khan - 2015-08-19 18:11:28 +0000