Greetings - I have a rhel 3 server that I want to migrate to centos. The FAQ: http://www.centos.org/modules/smartfaq/faq.php?faqid=19 pretty much tells me what I need to do but what is going to happen when I run yum update? Will it replace every RPM on my system with its centos counterpart or will it only upgrade RPMS as new versions are released? This is a production system and I'm trying to figure out what apps will potentially be affected by the migration. Also, should I uninstall the up2date package when I'm done? Thanks! Mike