*** This bug is a duplicate of bug 1534374 *** https://bugs.launchpad.net/bugs/1534374
This seems to be due in part to an issue with your network: 2015-12-02 17:53:34,578 DEBUG running doUpdate() (showErrors=True) 2015-12-02 17:56:36,120 ERROR IOError/SystemError in cache.update(): 'W:Failed to fetch http://us.archive.ubuntu.com/ubuntu/dists/vivid/universe/source/Sources Cannot initiate the connection to us.archive.ubuntu.com:80 (91.189.91.23). - connect (101: Network is unreachable) [IP: 91.189.91.23 80] , W:Failed to fetch http://us.archive.ubuntu.com/ubuntu/dists/vivid/multiverse/source/Sources Cannot initiate the connection to us.archive.ubuntu.com:80 (91.189.91.23). - connect (101: Network is unreachable) [IP: 91.189.91.23 80] , W:Failed to fetch http://us.archive.ubuntu.com/ubuntu/dists/vivid/main/binary-amd64/Packages Cannot initiate the connection to us.archive.ubuntu.com:80 (91.189.91.23). - connect (101: Network is unreachable) [IP: 91.189.91.23 80] , W:Failed to fetch http://us.archive.ubuntu.com/ubuntu/dists/vivid/restricted/binary-amd64/Packages Cannot initiate the connection to us.archive.ubuntu.com:80 (91.189.91.23). - connect (101: Network is unreachable) [IP: 91.189.91.23 80] Having said that the upgrade will fail due to bug 1534374. ** This bug has been marked a duplicate of bug 1534374 unable to upgrade beyond 14.04 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1522228 Title: upgrade couldn't find software that came with 14.04 so it could not upgrade them To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/ubuntu-release-upgrader/+bug/1522228/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs