Public bug reported: This just solved my issue:
* revert back to main Ubuntu server * reinstall apt from http://askubuntu.com/questions/765648/upgrading-from-15-10-to-16-04 -apt-not-installed The upgrade is running at the moment and has not finished yet. ProblemType: Bug DistroRelease: Ubuntu 15.10 Package: ubuntu-release-upgrader-core 1:15.10.0 ProcVersionSignature: Ubuntu 3.19.0-32.37-generic 3.19.8-ckt7 Uname: Linux 3.19.0-32-generic i686 ApportVersion: 2.17.3-0ubuntu4 Architecture: i386 CrashDB: ubuntu CurrentDesktop: Unity Date: Sun Jun 5 08:51:32 2016 InstallationDate: Installed on 2013-05-28 (1103 days ago) InstallationMedia: Ubuntu 13.04 "Raring Ringtail" - Release i386 (20130424) PackageArchitecture: all SourcePackage: ubuntu-release-upgrader UpgradeStatus: No upgrade log present (probably fresh install) VarLogDistupgradeTermlog: ** Affects: ubuntu-release-upgrader (Ubuntu) Importance: Undecided Status: New ** Tags: apport-bug dist-upgrade i386 third-party-packages wily -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1589201 Title: Upgrade from 15.04 to 16 fails with "(>= 1.0.10.2ubuntu2)' is not installed" To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/ubuntu-release-upgrader/+bug/1589201/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
