You haven't old us which release you are using but please see this document for currently supported Ubuntu releases: https://wiki.ubuntu.com/Releases
Ubuntu 13.10, Saucy Salamander, reached "End of Life" on July 17, 2014, nearly three years ago. Please use and/or upgrade to *only* currently supported releases of Ubuntu. ** Changed in: ubuntu-release-upgrader (Ubuntu) Status: New => Incomplete -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1683027 Title: I can't upgrade to 13.10 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/ubuntu-release-upgrader/+bug/1683027/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs