Distribution upgrade problem
12578
How do I upgrade to a newer version of Ubuntu?
140893
Error when using apt-get update
63176
How can I update to Ubuntu 21.04?
80233
Upgrade to 20.04 from 19.10 isn't available
144507
No facility exists in Update Manager to upgrade to a new version, why?
100494
Update Manager asking me to update kernel but apt-get upgrade does not?
134530
Can I look at the upgrade log after a distribution upgrade?
33651
How to upgrade from Ubuntu 12.10 to 14.04
64558
What does `do-release-upgrade` really do?
127766
how to upgrade my Debian package with minor changes
59017
How to repair Ubuntu installation after interrupted dist-upgrade without losing any custom settings?
135383
Unable to update my system Ubuntu13.04: Getting message - requires installation of untrusted packages
116445
"Can't check signature: public key not found" while upgrading, why?
41519
What can I do if a package is not available on the newest version of Ubuntu (18.04) but is available on older versions?
55211
Problem when upgrading to Ubuntu 14.04 from Ubuntu 12.04
87236
How to upgrade Ubuntu 12.04 to 13.10?
102559
How to install package from newer distribution?