Ubuntu dist-upgrade failure from 13.10 to 14.04 LTS
51768
Could not calculate the upgrade, what happened?
132495
14.04.5 to 16.04 Update failed - xenial.tar.gz.gpg missing
5316
Update from 14.04 to 16.04 failed with GPG error
20399
How do I upgrade from 14.04 LTS to 16.04.1 LTS?
153774
Upgrade to Ubuntu 13.10 from ISO image
58979
How can I upgrade Ubuntu LTS to the next one offline?
20398
dpkg broken after 15.04 upgrade fail
105335
How do I upgrade my Ubuntu server from one LTS version to another? Is this safe?
11579
Broken dependencies after upgrade
1520
How to install software or upgrade from an old unsupported release?
95210
APT wedged by kernel version mismatch
86777
Distribution upgrade problem "No new release found"
7580
How to safely upgrade from an older Ubuntu version to a newer one?
35152
Dependency errors for python3 and many others when I run sudo apt-get upgrade
12614
Upgrade problem
9901
How to upgrade from 18.10 to 19.10, using the command line?
16837
Unable to upgrade from 14.04 to 14.10 "Cannot Calculate Upgrades"