How to perform do-release-upgrade from 15.04 to 16.04 or later verions?
211
Can I skip over releases when upgrading?
81570
What does `--frontend` do in `do-release-upgrade` and where can I find the list of possible values?
151584
Why doesn't the command do-release-upgrade doesn't require sudo?
130579
how to upgrade a single package in debian
97346
Is it possible to skip releases during an upgrade?
98421
How will people upgrade from 12.10 to later releases after 13.04 is EOL?
129223
Ubuntu upgrade from 17.04 to 18.04
2136
How to roll back Ubuntu to a previous version?
19288
Update manager doesn't offer an upgrade to the new release
144172
How to upgrade to a point release from the same base release (12.04 to 12.04.03)
7580
How to safely upgrade from an older Ubuntu version to a newer one?
59088
How to upgrade to a newer release of Ubuntu using the Live CD?
89856
How to resume the interrupted upgrade from 14.10 to 15.04?
30754
Cannot update: "No available releases found"
51350
While updating the ubuntu 16.04 does not have a Release file Error
11556
Can I smoothly upgrade from one LTS to next LTS release?
77692
How do I update Drush to the latest available version?