Le 26/02/2018 à 16:12, Gordon Messmer a écrit : > I would hazard to guess that the flaw is simply that from time to time, > packages are added to the minimal install as a side effect of adding in > new dependencies. If you had a minimal install and simply ran "yum > update", you would periodically see yum report that it would install new > packages for dependencies, in addition to the updates. As that is the > case, you will need to update your minimal package list immediately > before running the pruning script in order to avoid removal of core > packages. OK, I found the culprit. A simple mix-up in my minimal package list. The file I used was the old one from a CentOS 7.2 installation. A simple 'diff' showed me where I was wrong. I updated the minimal package list, and everything works like a charm again. Cheers, Niki -- Microlinux - Solutions informatiques durables 7, place de l'église - 30730 Montpezat Site : https://www.microlinux.fr Blog : https://blog.microlinux.fr Mail : info at microlinux.fr Tél. : 04 66 63 10 32