> Hallo. > thanks to all for the answers. > One aspect is unclear for me. Updates are published using the update- > directory like the one in my question? > Yes, there is a "base" repo which is what is used as a fresh install for that particular version of CentOS. The "updates" repo contains the updated packages. The two repos go together: "base" gives a fixed reference point for the version, "updates" builds on it. You normally need both. As others have said, you really shouldn't be looking to alter what was installed by the installer unless you really know what you are doing. What is the background to the question you are asking - why does it matter? P.