Once a version of Ubuntu crosses EOL, can no more packages be installed on it?
1520
How to install software or upgrade from an old unsupported release?
23096
How to remove obsolete packages after failed release upgrade via do-release-upgrade on Ubuntu?
18052
How to remove/install a package that is not fully installed?
2280
Package system is broken. How to fix it?
18306
How to make apt ignore unfulfilled dependencies of installed package?
117112
Why isn't Ubuntu moving its repositories to old-releases anymore?
123413
Will apt-get dist-upgrade upgrade my system to a newer version?
112955
How can I upgrade Ubuntu from 19.10 to 20.04 without losing packages?
72480
Apt fails to remove partially installed kernel and can't install any other packages
7580
How to safely upgrade from an older Ubuntu version to a newer one?
157525
How to delete old versions of same packages from a Local Repository?
22701
If I build a package from source how can I uninstall or remove completely?
135635
How to completely remove virtual packages?
107009
ubuntu 18.04 apt-get upgrade problem "redirection loop encountered."
58032
How to install the previous version of a .deb package and pin it?
118978
Not all updates can be installed: partial upgrade
139753
Is it possible to downgrade packages installed with ELPA?