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I am trying to update my linux server (2.4.21-20.EL server) with updates. I think the /var/lib/rpm/Packages file is corrupt, as it won't get any updates. When I run yum update all it does is "Downloading needed headers No Packages available for Update No actions to take" I've tried rebuilding the Packages file, which apparently is successful, but the file size is much smaller than the previous one and I know this machine needs the updates, as it hasn't been updated in a year or two. Is there a way to force yum to update (which it doesn't look like there is), or some other alternative? I really need to get this machine upgraded!
I logged in and looked at /etc and did as billymayday suggested. There isn't any file called yum.repos.d. I did the yum clean all and then repeated the process. Now I'm getting a message that says: "Your GPG keyring does not contain the Red Hat, Inc public key. Your Update Agent options specify the you want to use GPG. To install the key, run the following as root: rpm --impport /usr/share/info/rhn/RPM-GPG-KEY". This returns an empty line. So now...? Thanks for the help!