UPDATE from 16.04 to 18.04 ERROR requires installation of untrusted packages
11166
"Require Installation Of Untrusted Packages" while upgrading with the update manager
103929
sudo apt upgrade error 18.04 (Broken Packages)
120161
Ubuntu 19.04 problems install upgrades
90822
How can I install just security updates from the command line?
113145
What does 'apt-get install update' do?
118978
Not all updates can be installed: partial upgrade
109677
How do I to resolve unmet dependencies to uninstall and reinstall package
64509
Can't update from official repositories [Error 409]
5162
How to fake a package version installed?
19749
How to debug an unmet dependencies problem?
150033
E: Sub-process /usr/bin/dpkg returned an error code (1) for almost all updates
6833
Why is my Ubuntu 18.04 distribution asking me to upgrade to Pop!_OS 19.10?
9322
Software Updater Issue 16.04
12054
How do I deal with "unauthenticated sources" errors in the Software Center?
135575
How to fix a "Failed to fetch binary-armhf/Packages" error during apt-get update?
107009
ubuntu 18.04 apt-get upgrade problem "redirection loop encountered."
1632
How do I fix a "Failed to download package files" error?