updating from 11.1 to 13.1 or higher
1520
How to install software or upgrade from an old unsupported release?
112955
How can I upgrade Ubuntu from 19.10 to 20.04 without losing packages?
129223
Ubuntu upgrade from 17.04 to 18.04
60351
How can I update to a newer version of Git using apt-get?
71382
Upgrade iPad to newer (but not latest) iOS
1772
iPad 1 update from 5.1.1 to 7.1
105649
How can I download an older version of Xcode?
95336
Installing particular versions when repo has newer versions?
52190
How and when is old-releases.ubuntu.com updated?
13107
How to install updates via command line?
2136
How to roll back Ubuntu to a previous version?
211
Can I skip over releases when upgrading?
67481
How to revert a do-release-upgrade?
144507
No facility exists in Update Manager to upgrade to a new version, why?
130579
how to upgrade a single package in debian
31506
How do I update Ubuntu manually?
121201
Why can't I update applications without upgrading the whole OS?