This issue affected me too, and I think I figured out what the issue is. When the do-release upgrade script gives this prompt, While scanning your repository information no mirror entry for the upgrade was found. This can happen if you run an internal mirror or if the mirror information is out of date.
Do you want to rewrite your 'sources.list' file anyway? If you choose 'Yes' here it will update all 'cosmic' to 'disco' entries. and you say yes, it doesn't actually update all the 'cosmic' entries to 'disco'. Instead, it comments out the cosmic entries to mirrors.digitalocean.com, leaving only a few security.ubuntu.com entries uncommented. (I presume the ubuntu-minimal package is not available from those sources) I confirmed this by opening another SSH session at this prompt: Third party sources disabled Some third party entries in your sources.list were disabled. You can re-enable them after the upgrade with the 'software-properties' tool or your package manager. To continue please press [ENTER] ... and then I went to look at /etc/apt/sources.list and found most of the entries commented. I uncommented all the entries for mirrors.digitalocean.com, changed cosmic to disco, then went back to the original SSH session, hit enter, and suddenly the upgrade proceeded. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1825938 Title: Cannot update to 19.04 ubuntu-minimal could not be located To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/ubuntu-release-upgrader/+bug/1825938/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
