Let me see if I finally have this straight... - up2date and rhn-applet-gui are two entirely different utilities neither of which have any dependency upon the other. Almost unrelated except in purpose. - up2date uses the contents of /etc/yum.conf for its purposes - rhn-applet-gui uses the contents of /etc/sysconfig/rhn/sources for its purposes Now for the questions. 1) Assuming the above is accurate, would there be any point in having the resources pointed to by those files be different i.e. having a update mirror in one but fedora.com in the other? If not, then why aren't they combined into one file? They look like they do pretty much the same thing to me... 2) What is the purpose of https://xmlrpc.rhn.redhat.com/XMLRPC showing up as a RHN server in up2date-config? It doesn't seem to do anything. Thanks for any insights. I'm just trying to understand things better.