Setting up Fedora Core 6
Why FC6?
Fedora Core 6 is the most compatible release to Red Hat Enterprise Linux 5. See the Matching Fedora Core to Red Hat Enterprise Linux HOWTO for details. This means that generally you will be able to use FC6 as a build machine and testbed for RHEL5 and CentOS5 machines.
Obtain the ISO Image
Fedora has moved the FC6 DVD image to an archive.
You can find it here:
http://archives.fedoraproject.org/pub/archive/fedora/linux/core/6/x86_64/iso/
Install
You can install the ISO on a native machine, in a virtual machine or in the cloud.
Fix the yum Repository Configuration
Since Red Hat has moved FC6 to archives the stock yum repository configuration shipped on the DVD image won't work anymore.
To fix this, replace the stock repository configuration with the contents of this tarball:
http://www.bonsai.com/wiki/howtos/misc/fc6_yum_repos_d.tar.bz2
cd /etc
mv yum.repos.d yum.repos.d.ORIG
tar xvfj fc6_yum_repos_d.tar.bz2
Update!
Update your system:
sudo yum update