Cannot update Ubuntu 13.04
3298
How do I resolve unmet dependencies after adding a PPA?
129223
Ubuntu upgrade from 17.04 to 18.04
13107
How to install updates via command line?
72603
Unsupported major.minor version 52.0
86777
Distribution upgrade problem "No new release found"
121201
Why can't I update applications without upgrading the whole OS?
16837
Unable to upgrade from 14.04 to 14.10 "Cannot Calculate Upgrades"
7357
upgrade to 13.10 stalled and restart failed
20751
Problem upgrading Ubuntu 9.10
4124
I cannot run apt update properly - apt update hangs
112955
How can I upgrade Ubuntu from 19.10 to 20.04 without losing packages?
77692
How do I update Drush to the latest available version?
967
How can I avoid "please insert CD/DVD" error when updating Ubuntu?
8525
Error Updating: izx/askubuntu/ubuntu xenial Release' does not have a Release file
64509
Can't update from official repositories [Error 409]
24165
Upgrade to version newer than repositories
52190
How and when is old-releases.ubuntu.com updated?