Can't upgrade from Ubuntu 14.04 to 16.04 - dependency issue
12534
14.04 --> 16.04 failed; apt (>= 1.0.1ubuntu2.13)' is not installed
5820
How to fix the “Unable to calculate upgrade” issue from command line when upgrading from 12.04 to 14.04?
33651
How to upgrade from Ubuntu 12.10 to 14.04
3275
I can't seem to install Ubuntu 16.04.2
153266
errors upgrading from 14.04 to 16.04 about Unknown Multi-Arch type for compiz, libkf5akonadisearch-bin packages
151579
Interrupted upgrade from 15.10 to 16.04, Ubuntu boots into black screen
74990
Error while trying to upgrade from Ubuntu 18.04 to 18.10: "Please install all available updates for your release before upgrading."
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?
44991
A lot of missing dependencies when I try to install all software
77705
Unable to upgrade in ubuntu
5316
Update from 14.04 to 16.04 failed with GPG error
80794
Ubuntu 18.04 stuck at upgrading linux-header
36696
Unmet dependencies unable to fix
98844
upgrade 14.04 with errors and shows red sign on top
23096
How to remove obsolete packages after failed release upgrade via do-release-upgrade on Ubuntu?
102559
How to install package from newer distribution?
24734
Google Chrome update won't install due to unmet dependencies