Your sources.list file only has main in it which will likely make the upgrade difficult to calculate.
2018-04-27 19:43:08,499 DEBUG examining: 'deb http://np.archive.ubuntu.com/ubuntu/ xenial main' 2018-04-27 19:43:08,500 DEBUG entry 'deb http://np.archive.ubuntu.com/ubuntu/ bionic main' updated to new dist 2018-04-27 19:43:08,500 DEBUG examining: 'deb http://ubuntu.ntc.net.np/ubuntu/ xenial main' 2018-04-27 19:43:08,500 DEBUG entry 'deb http://ubuntu.ntc.net.np/ubuntu/ bionic main' updated to new dist Please try enabling universe and see if that resolves the issue. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1767380 Title: upgrading from 16 to 18 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/ubuntu-release-upgrader/+bug/1767380/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
