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@updatesand the initial version for the OS located@fedora. For example if you try to installhttpd-2.4.8-1,yumwould say package not available.python-libs-2.7.5-12.fc20.x86_64was once installed on my computer but has since been replaced. Assuming now I want to install this specific package,yumdownloader python-libs-2.7.5-12*would sayNo Match for argument python-libs-2.7.5-12* Nothing to download. What I am trying to say is that once a new package arrive, the old one would no longer be accessible from yum. You can only install the latest package or the initial version, but not versions in between.yum downgrade ...if the package was already installed and you're attempting to go back to it later. In my Q I was attempting to show how one would hand select a particular version of a package that hadn't been installed yet. docs.fedoraproject.org/en-US/Fedora/14/html/…