Can't update 20.10 W: Target source is configured multiple times
991
How can I fix apt error "W: Target Packages ... is configured multiple times"?
64561
Can multiple versions of the same package co-exist on the same system?
144507
No facility exists in Update Manager to upgrade to a new version, why?
55310
Attempting to Install MSU hotfixes results in "Searching for updates on this computer..." to last forever
9322
Software Updater Issue 16.04
86602
How to get mercurial to emit base revision of conflicted file as well as modified version?
138044
How can I stop the Software Updater from nagging me to restart?
119920
Failed upgrade from Ubuntu 19.10 to 20.04 "Please update the microcode"
109624
How do I tell apt to never upgrade a particular package?
53336
Set Update Manager to install to sites/all/modules/contrib?
5830
How to prevent updating of a specific package?
140850
Why does do-release-upgrade on Xubuntu running version 18.04 not offer to update to 20.04.1?
118978
Not all updates can be installed: partial upgrade
1687
How to revert software sources back to default?
54710
How can I re install the APT Tool?
77692
How do I update Drush to the latest available version?
155198
What is the difference between the "jessie" and "jessie-updates" distributions in /etc/apt/sources.list?