They provide security patches for each version of Fedora for an additional 1 1/2 years after the Fedora Project stops their support.
Red Hat Enterprise Linux 4 is based on Fedora Core 3, so if you want to learn a little about RHEL 4 for free, use Fedora Core 3.
Even then, it will take three to four hours to download all four images.
For more information about Fedora's support cycle see the life cycle page, Cycle It has occurred to me that this guide may be mis-interpreted as a guide on how to install any software you want to install for older releases of Fedora. It is about being able to use yum for these older versions when the original repositories are long since closed.(Thanks to various IRC folks and vegan_linuxguy for troubleshooting this.Thanks to "m d," David Ball, and others for pointing out an important typo in this question!I've answered many basic questions in the Fedora Basics FAQ.Even if you're not new to Linux, you might find one or two helpful hints in there. The upgrades are usually very easy, much like Red Hat Linux 8 - Red Hat Linux 9. If you don't want to upgrade every 6 - 8 months, there is something called the Fedora Legacy Project.