Which linter is used with eglot and python-mode?

I have two machines running with Debian 11 and sharing exactly the same `init.el`. But when they open the same py-file Emacs/eglot shows me a extrem different number of linter warnings. I am not sure how the components in the background work together. How can I go on with diagnosis here to find out where the difference is. The init.el is the same, so both use the same python-mode (emacs in build) and eglot.

well, eglot is just a client, so check what language server for python you have on both machines. Maybe the versions differ, maybe you use completely different servers