I'm talking about one architecture, one distribution "at a time" (no multi-boot) and only packages in official repositories. If repos from different distros can be mixed, I'd like to distinguish between "pure distributions" (like "only FreeBSD") and "mixed distributions" (like "debian + ubuntu + mint + NetBSD").

I hope the answer doesn't depend a lot on the package manager...

Is there a way to "dry-run" (as apt calls it), like testing it on a (distribution) site? How large/heavy would that system be?

How about having the same packages for several architectures, including a distribution and all (active) descended distributions (e. g. OpenBSD + Fugulta + MirOS BSD)?

If the question is too vague, a lower and upper border are also acceptable. I "know" that there's an objective answer, it's certainly just too computational intense for a private person.

closed as too broad by Rui F Ribeiro, Stephen Harris, Jeff Schaller, Archemar, Christopher Jan 24 at 16:35

Please edit the question to limit it to a specific problem with enough detail to identify an adequate answer. Avoid asking multiple distinct questions at once. See the How to Ask page for help clarifying this question. If this question can be reworded to fit the rules in the help center, please edit the question.

  • I would say that all the packages in the official repositories should be tested to work alongside each other (with some exceptions, e.g. only one of LibreOffice and OpenOffice should be installed). I would strongly discourage mixing linux distros and installing packages from one distro into another distro. -- And I cannot give you a number. – sudodus Jan 23 at 18:57
  • When I try # apt install x*, it gives me conflicting packages, of which most don't seem to interact (but they obviously do). – Nepumuk Jan 24 at 21:32
  • Which linux distro and version are you running? Please tell us and we can look at the specific details of that distro and version. Are there some particular program packages or combination of packages, that create problems for you? – sudodus Jan 25 at 5:36

The big players are Debian, Fedora, and ArchLinux and their derivatives.


> apt list 2>/dev/null | grep bionic | wc -l


> yum list | grep "  " | wc -l

As you note some of those may conflict, or be broken, etc. Yes you can dry run, for example on arm64 Ubuntu;

> apt install * 2>/dev/null | grep "not installable" | wc -l
> apt install * 2>/dev/null | grep "Conflicts" | wc -l
> echo "62007-135-903" | bc

So 60969 is probably as close a guess as you will get without actually installing everything for which you may want a fast VM with ~1 TB of free space.

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