How to upgrade Jaunty 9.04 to Ubuntu 12.04?
211
Can I skip over releases when upgrading?
75798
How to upgrade to the latest GNOME version?
112955
How can I upgrade Ubuntu from 19.10 to 20.04 without losing packages?
89744
Extended support for Ubuntu 12
35243
Is it safe to do-release-upgrade from 12.04.4 to 14.04.1?
87236
How to upgrade Ubuntu 12.04 to 13.10?
43778
Is it possible to "upgrade" from a 32bit to a 64bit installation?
16428
Upgrade to the latest PHP version in ubuntu 16.04
79358
Upgrade High-Trust Addin/App from 2013 to 2016
7580
How to safely upgrade from an older Ubuntu version to a newer one?
44639
How can I install Celestia on Ubuntu 18.04.1?
71052
How to make Firefox use the newest Java version, which is already installed?
50810
No upgrade available for 19.04 from 18.10
29775
Is there a way to use JAVA on Ubuntu after FF stopped NPAPI support?
126659
upgrade from 11.10 to 12.04 - No upgrade option available in update manager
103445
Will painless upgrading from Drupal 8 alpha 3.x to beta be possible?
144507
No facility exists in Update Manager to upgrade to a new version, why?