> is there a way / software to find out which security patches my > different CentOS systems are missing? Maybe with the according > CESA announcement displayed? I'll put in a plug for a software project that I am developer/contributor for, OpenVAS (Open Vulnerability Assessment Scanner). http://www.openvas.org If you configure OpenVAS to use a SSH enabled login account, it will tell you which security patches you are missing. If you do just a remote scan, it will give you an incomplete list of missing patches. It is cross-platform too. -geoff --------------------------------- Geoff Galitz Blankenheim NRW, Germany http://www.galitz.org/ http://german-way.com/blog/