Hi all. Ive been using 16.04 since release and have had no issues updating and upgrading 16.04. Id like to move on to 18.04 now. Ive tried to the graphical mechanism. After entering my password, the dialog box disappears. In terminal Ive tried update...then upgrade...then dist-upgrade and do-release-upgrade.
I am told " Please install all available updates for your release before upgrading." or that there is nothing to upgrade to.
I poked through my PPA list and found no options for the 18.04. I think this is the problem but am not sure.
What is the next step? What did I break? What am I missing? Appreciate any input
-J