Problems in updating ubuntu
93574
E: Some index files failed to download. They have been ignored, or old ones used instead after apt-get update
77062
Updates stopped and fix-broken install is broken
53609
Download of Ubuntu fails
135383
Unable to update my system Ubuntu13.04: Getting message - requires installation of untrusted packages
11166
"Require Installation Of Untrusted Packages" while upgrading with the update manager
121201
Why can't I update applications without upgrading the whole OS?
107792
Update information outdated, "Failed to fetch cdrom"
85724
Cannot update/get any packages. gedit not installed
129223
Ubuntu upgrade from 17.04 to 18.04
154072
Ubuntu 17.10 doesn't show up in update-manager
144507
No facility exists in Update Manager to upgrade to a new version, why?
31506
How do I update Ubuntu manually?
93942
How to fix "Failed to download repository information" error while updating?
64509
Can't update from official repositories [Error 409]
118978
Not all updates can be installed: partial upgrade
158145
A software update is required to use this startup disk - does not update
145400
Error when trying sudo apt-get update - Python related?