Unable to upgrade Ubuntu 14.04 LTS to Ubuntu 16.04 LTS
2670
Why is "No new release found" when upgrading from a LTS to the next?
63278
Update Linux Subsystem on Windows (Ubuntu) to 16.04
20751
Problem upgrading Ubuntu 9.10
129101
Upgrading Ubuntu 9.04 to 9.10 when Update Manager doesn't let you
149279
Why can not upgrade texlive2016 to texlive2017 on windows
23096
How to remove obsolete packages after failed release upgrade via do-release-upgrade on Ubuntu?
5882
How to upgrade Ubuntu from an ISO image
132495
14.04.5 to 16.04 Update failed - xenial.tar.gz.gpg missing
56225
Do I have to download both the 14.04 and the 14.04.1 versions of ubuntu?
967
How can I avoid "please insert CD/DVD" error when updating Ubuntu?
128471
How do I update from 9.0.10 to 9.1.0?
30754
Cannot update: "No available releases found"
129223
Ubuntu upgrade from 17.04 to 18.04
19288
Update manager doesn't offer an upgrade to the new release
48809
"The upgrade has aborted" error, how to proceed?
58979
How can I upgrade Ubuntu LTS to the next one offline?
63176
How can I update to Ubuntu 21.04?