SYS: Configure a physical machine to host virtual guests.

Install the virtualization packages:

# yum groupinstall -y Virtualization
# yum groupinstall -y "Virtualization Platform"
# yum groupinstall -y "Virtualization Client"

Start the libvirtd service:

# service libvirtd start

For a deeper understanding of the subject, you can look at how to set up a lab.