Upgrade to ubuntu 12.04 failures
72296
Upgrading Ubuntu from 12.04 to 12.10 broke my system, completely.
151605
upgrading from 15.10 to 16.04 apt not installed
98844
upgrade 14.04 with errors and shows red sign on top
42634
How do I upgrade to the development release (aka. Ubuntu+1)?
5877
"Failed to fetch" while updating
151579
Interrupted upgrade from 15.10 to 16.04, Ubuntu boots into black screen
11579
Broken dependencies after upgrade
63176
How can I update to Ubuntu 21.04?
12614
Upgrade problem
36703
How do I upgrade from 12.10 to 13.04?
98511
16.04 Cannot install anything from Ubuntu Software center
12578
How do I upgrade to a newer version of Ubuntu?
23096
How to remove obsolete packages after failed release upgrade via do-release-upgrade on Ubuntu?
5820
How to fix the “Unable to calculate upgrade” issue from command line when upgrading from 12.04 to 14.04?
74079
How to Upgrade Ubuntu 12.04.2, 12.04.3 to 12.04.4, the next Hardware Enablement Stack?
79554
Power failure during upgrade
76905
Failure [INSTALL_FAILED_ALREADY_EXISTS] when I tried to update my application