Upgrade from 12.04 LTS to 14.10
97346
Is it possible to skip releases during an upgrade?
35243
Is it safe to do-release-upgrade from 12.04.4 to 14.04.1?
121201
Why can't I update applications without upgrading the whole OS?
49161
Upgrade manager wants me to do a partial upgrade
120436
Point Release upgrade from 14.04.1 to 14.04.2?
35566
Kernel did not upgrade between 14.04 LTS to 16.04 LTS
75798
How to upgrade to the latest GNOME version?
24165
Upgrade to version newer than repositories
112955
How can I upgrade Ubuntu from 19.10 to 20.04 without losing packages?
100141
Is there any "official" guidance to upgrading from Lubuntu 18.04 LTS (LXDE) to Lubuntu 18.10 (LXQt)
87236
How to upgrade Ubuntu 12.04 to 13.10?
36703
How do I upgrade from 12.10 to 13.04?
147789
Updating core from 8.4.4 to 8.6.1
88901
Updates for Ubuntu LTS Desktop versus LTS Server
100963
How to only perform LTS upgrades?
60659
Install newer package version from trusty-backports
11556
Can I smoothly upgrade from one LTS to next LTS release?