Obtain the ISO file
ISOs are best downloaded from the Internet, for example:
| • | Red Hat Enterprise Linux (you must have a valid subscription to access the Red Hat Network) |
| • | Fedora |
| • | CentOS |
| • | http://mirrors.kernel.org/centos/5.5/isos/x86_64/CentOS-5.5-x86_64-bin-DVD-1of2.iso (DVD 2 is not needed) |
If you have the Operating System on a DVD or CD-ROM, extract your ISO from the physical media.