Package ... is not available, but is referred to by another package
3523
What does "Package  has no installation candidate" mean?
39944
What does "(Install)" mean in a package?
30754
Cannot update: "No available releases found"
62476
E: Package '' has no installation candidate
14630
arXiv: "Option clash for package hyperref." when there are no options!
131638
Packages that need to be included in a specific order
74763
Unmet dependencies. Try 'apt --fix-broken install' with no packages (or specify a solution)
118754
Package dependencies cannot be resolved
48766
Cross-reference packages: which to use, which conflict?
15828
How to find which package provides a file?
7460
E: Unable to correct problems, you have held broken packages
8780
How can I find out in which distributions a package is available?
119323
"Unable to locate package" errors for all software
11543
How to solve the "The following module is missing from the file system" error?
149428
How do I refresh the package list?
36696
Unmet dependencies unable to fix
26308
How to solve "Unable to find expected entry 'restricted/binary-1386/Packages' Wrong sources.list entry or malformed file"?