Cannot Upgrade from Ubuntu 14.10
1520
How to install software or upgrade from an old unsupported release?
15687
How do I resume a release upgrade?
123413
Will apt-get dist-upgrade upgrade my system to a newer version?
86777
Distribution upgrade problem "No new release found"
153774
Upgrade to Ubuntu 13.10 from ISO image
120161
Ubuntu 19.04 problems install upgrades
7357
upgrade to 13.10 stalled and restart failed
80794
Ubuntu 18.04 stuck at upgrading linux-header
80233
Upgrade to 20.04 from 19.10 isn't available
74990
Error while trying to upgrade from Ubuntu 18.04 to 18.10: "Please install all available updates for your release before upgrading."
20399
How do I upgrade from 14.04 LTS to 16.04.1 LTS?
12534
14.04 --> 16.04 failed; apt (>= 1.0.1ubuntu2.13)' is not installed
36986
Ubuntu kernel not upgrading with upgrade to 15.10
144507
No facility exists in Update Manager to upgrade to a new version, why?
114305
On really old Ubuntu 6.06 - How to upgrade
56150
Can't upgrade/update ubuntu 18.04 as apt/dpkg error is showing up
49161
Upgrade manager wants me to do a partial upgrade