How to upgrade a remote box from 10.10 to 12.04 LTS when apt doesn't work?
7580
How to safely upgrade from an older Ubuntu version to a newer one?
144507
No facility exists in Update Manager to upgrade to a new version, why?
53588
How do remove the CD / DVD install as a source for apt-get packages when installing new features?
8603
Upgrading my Wubi 11.04 to 11.10
54571
How do I install the latest version of Git with apt?
19464
What are the easy ways to install Ubuntu remotely?
43281
Upgrade Debian Jessie (8) to Buster (10) possible or need to go sequential in versions upgrades?
57377
Will I be able to use wubi to install Ubuntu releases newer than 12.10?
80233
Upgrade to 20.04 from 19.10 isn't available
967
How can I avoid "please insert CD/DVD" error when updating Ubuntu?
20399
How do I upgrade from 14.04 LTS to 16.04.1 LTS?
40885
What should I do when I got the KEYEXPIRED error message after an apt-get update?
42634
How do I upgrade to the development release (aka. Ubuntu+1)?
8722
How to make apt recognize an installed tar package?
102559
How to install package from newer distribution?
127852
How do I update a program installed from a manually-downloaded deb package?
95336
Installing particular versions when repo has newer versions?