trying to upgrade from command line gives this: ~$ sudo apt update && sudo apt dist-upgrade [sudo] password for humphrey: Ign:1 http://au.archive.ubuntu.com/ubuntu xenial InRelease Hit:2 http://au.archive.ubuntu.com/ubuntu xenial-updates InRelease Ign:3 http://au.archive.ubuntu.com/ubuntu xenial-backports InRelease Err:4 http://au.archive.ubuntu.com/ubuntu xenial Release 403 Forbidden [IP: 202.158.214.106 80] Hit:5 http://au.archive.ubuntu.com/ubuntu xenial-backports Release Hit:7 http://apt.insynchq.com/ubuntu xenial InRelease Err:7 http://apt.insynchq.com/ubuntu xenial InRelease The following signatures were invalid: KEYEXPIRED 1599756787 KEYEXPIRED 1599757948 KEYEXPIRED 1599756787 KEYEXPIRED 1599756787 KEYEXPIRED 1599757948 Hit:9 http://ppa.launchpad.net/fingerprint/fingerprint-gui/ubuntu xenial InRelease Get:8 http://apt.insync.io/ubuntu xenial InRelease [5,539 B] Get:10 http://security.ubuntu.com/ubuntu xenial-security InRelease [109 kB] Err:8 http://apt.insync.io/ubuntu xenial InRelease The following signatures were invalid: KEYEXPIRED 1599756787 KEYEXPIRED 1599757948 KEYEXPIRED 1599756787 KEYEXPIRED 1599756787 KEYEXPIRED 1599757948 Hit:11 http://archive.canonical.com/ubuntu xenial InRelease Reading package lists... Done E: The repository 'http://au.archive.ubuntu.com/ubuntu xenial Release' does not have a Release file. N: Updating from such a repository can't be done securely, and is therefore disabled by default. N: See apt-secure(8) manpage for repository creation and user configuration details. W: An error occurred during the signature verification. The repository is not updated and the previous index files will be used. GPG error: http://apt.insynchq.com/ubuntu xenial InRelease: The following signatures were invalid: KEYEXPIRED 1599756787 KEYEXPIRED 1599757948 KEYEXPIRED 1599756787 KEYEXPIRED 1599756787 KEYEXPIRED 1599757948 W: An error occurred during the signature verification. The repository is not updated and the previous index files will be used. GPG error: http://apt.insync.io/ubuntu xenial InRelease: The following signatures were invalid: KEYEXPIRED 1599756787 KEYEXPIRED 1599757948 KEYEXPIRED 1599756787 KEYEXPIRED 1599756787 KEYEXPIRED 1599757948 humphrey@Gummitch:~$
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1914846 Title: cannot upgrade from 16.04 to 18.04 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/ubuntu-release-upgrader/+bug/1914846/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
