How to revert a do-release-upgrade?
2136
How to roll back Ubuntu to a previous version?
106931
How to undo sudo add-apt-repository?
36703
How do I upgrade from 12.10 to 13.04?
64558
What does `do-release-upgrade` really do?
111573
What's the best way to re-enable PPAs/repos after an upgrade?
49161
Upgrade manager wants me to do a partial upgrade
66915
How to request a package upgrade in the next Ubuntu release
126343
How to downgrade a package via apt-get?
13399
Why can I no longer (un)install packages via apt-get after doing a partial dist-upgrade?
421
How do I update a Drupal distribution to a newer version?
81570
What does `--frontend` do in `do-release-upgrade` and where can I find the list of possible values?
86152
How to revert a "git rm -r ."?
98421
How will people upgrade from 12.10 to later releases after 13.04 is EOL?
18052
How to remove/install a package that is not fully installed?
23096
How to remove obsolete packages after failed release upgrade via do-release-upgrade on Ubuntu?
53588
How do remove the CD / DVD install as a source for apt-get packages when installing new features?
112955
How can I upgrade Ubuntu from 19.10 to 20.04 without losing packages?