aaltonen.us » Blog Archive » Yum in Fedora Core 3 is the best explanation of how to use yum on RedHat Fedora 3. Although I found the RPM-GPG-KEY-fedora file in /usr/share/doc/fedora-release-3/RPM-GPG-KEY-fedora, not /usr/share/rhn/RPM-GPG-KEY-fedora.
News, notes and resources on open source, Linux, and UNIX computers; By Neil Johnson, Cadent Technologies Corp.