Unable to install most major packages; Unmet dependencies and cannot be fixed
3298
How do I resolve unmet dependencies after adding a PPA?
98511
16.04 Cannot install anything from Ubuntu Software center
11671
"Unable to locate package" while trying to install packages with APT
139545
Troubleshooting Packaging Error of General function failure?
81648
How to download a software package with all dependencies and sub-dependencies?
131338
How do I deal with unknown installation error code -505?
75784
"Unmet dependencies" When trying to install KDE Plasma 5.3 on Ubuntu 15.04
30645
How to install (old) packages for Ubuntu 9.04?
86963
Why do I get an "unmet dependencies" error when trying to install WINE?
135383
Unable to update my system Ubuntu13.04: Getting message - requires installation of untrusted packages
119323
"Unable to locate package" errors for all software
73357
Every package "has no installation candidate"
146564
How to fix unmet dependencies for udev:amd64 error on Ubuntu 18.04?
32426
How to install packages?
72603
Unsupported major.minor version 52.0
73173
How to Fix Broken Packages?
140793
Problem installing a package