problems for installing software: What is the code that has to be sent to download and install software from Universe?

[Ralf Mardorf]

PS:

If packages e.g. should be provided by "universe" and a third party
repository and you want to ensure to get the package from "universe"
and not from the third party repository, you need to mention this.

We need to know exactly what you want to do.

There are several solutions, for several needs, such as e.g. "pinning".