appears to be using eoan package sources for focal upgrade.. first check normal state of apt update to eoan for reference:
derk@zlink1 ~ $ sudo apt update Hit:1 http://ca.archive.ubuntu.com/ubuntu eoan InRelease Hit:2 http://ca.archive.ubuntu.com/ubuntu eoan-updates InRelease Hit:3 http://ca.archive.ubuntu.com/ubuntu eoan-backports InRelease Hit:4 http://ca.archive.ubuntu.com/ubuntu eoan-security InRelease Hit:5 http://ca.archive.ubuntu.com/ubuntu eoan-proposed InRelease Reading package lists... Done Building dependency tree Reading state information... Done All packages are up to date. ### okay now try upgrade: RC=0 derk@zlink1 ~ $ sudo do-release-upgrade -d Checking for a new Ubuntu release Get:1 Upgrade tool signature [1,554 B] Get:2 Upgrade tool [1,334 kB] Fetched 1,335 kB in 0s (0 B/s) authenticate 'focal.tar.gz' against 'focal.tar.gz.gpg' extracting 'focal.tar.gz' Reading cache Checking package manager Reading package lists... Done Building dependency tree Reading state information... Done Hit http://ca.archive.ubuntu.com/ubuntu eoan InRelease Hit http://ca.archive.ubuntu.com/ubuntu eoan-updates InRelease Hit http://ca.archive.ubuntu.com/ubuntu eoan-backports InRelease Hit http://ca.archive.ubuntu.com/ubuntu eoan-security InRelease Hit http://ca.archive.ubuntu.com/ubuntu eoan-proposed InRelease Fetched 0 B in 0s (0 B/s) Reading package lists... Done Building dependency tree Reading state information... Done Updating repository information No valid sources.list entry found While scanning your repository information no entry about disco could be found. An upgrade might not succeed. Do you want to continue anyway? ### Uhmm this should be focal not eoan here no-wonder we fails Continue [yN] y Hit http://ca.archive.ubuntu.com/ubuntu eoan InRelease Hit http://ca.archive.ubuntu.com/ubuntu eoan-updates InRelease Hit http://ca.archive.ubuntu.com/ubuntu eoan-backports InRelease Hit http://ca.archive.ubuntu.com/ubuntu eoan-security InRelease Hit http://ca.archive.ubuntu.com/ubuntu eoan-proposed InRelease Fetched 0 B in 0s (0 B/s) Checking package manager Reading package lists... Done Building dependency tree Reading state information... Done Calculating the changes Calculating the changes Restoring original system state Aborting Reading package lists... Done Building dependency tree Reading state information... Done #### so the upgrade file has been accidentally reverted to eoan ?? -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1851040 Title: "No valid sources.list entry found" during attempt to upgrade from Eoan to Focal To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/ubuntu-release-upgrader/+bug/1851040/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs