Can I migrate from 19.10 to 20.10 Without re-installing?
211
Can I skip over releases when upgrading?
121201
Why can't I update applications without upgrading the whole OS?
46084
Can I downgrade from macOS Sierra to Snow Leopard (OS X 10.6)?
16782
Install packages from newer release without building (apt pinning)
25678
How to do a minimal install of 20.04?
31506
How do I update Ubuntu manually?
2136
How to roll back Ubuntu to a previous version?
24165
Upgrade to version newer than repositories
35093
Upgrading from the command line?
54710
How can I re install the APT Tool?
29191
Upgrade to 18.04 from 17.10
32200
How do I downgrade a package?
58979
How can I upgrade Ubuntu LTS to the next one offline?
1687
How to revert software sources back to default?
67481
How to revert a do-release-upgrade?
89400
How to save/restore Sublime Text 2 configs/plugins to migrate to another computer?
7580
How to safely upgrade from an older Ubuntu version to a newer one?