Issues while upgrading from Ubuntu 14.04 LTS to 16.04
728
Unable to lock the administration directory (/var/lib/dpkg/) is another process using it?
74990
Error while trying to upgrade from Ubuntu 18.04 to 18.10: "Please install all available updates for your release before upgrading."
74079
How to Upgrade Ubuntu 12.04.2, 12.04.3 to 12.04.4, the next Hardware Enablement Stack?
151605
upgrading from 15.10 to 16.04 apt not installed
5820
How to fix the “Unable to calculate upgrade” issue from command line when upgrading from 12.04 to 14.04?
26387
After Upgrade to Ubuntu 20.04: "Oh no! Something went wrong"
38318
No panels or menus after upgrading to 14.04
105335
How do I upgrade my Ubuntu server from one LTS version to another? Is this safe?
63176
How can I update to Ubuntu 21.04?
29191
Upgrade to 18.04 from 17.10
149984
Can't update or install anything. Ubuntu 3.11.0.14
69200
How do I reinstall Ubuntu Software in Ubuntu 20.04 LTS version?
7580
How to safely upgrade from an older Ubuntu version to a newer one?
154622
How do I resolve this installation error?
31892
New "Ubuntu Software" not working (16.04)
149279
Why can not upgrade texlive2016 to texlive2017 on windows
118428
lib32bz2-1.0 missing on 16.04