Go for CentOS instead, it's almost exactly RHEL (there's a big tie up between Red Hat (company) and the CentOS developers that was announced a few months back) but with branding removed. You can see a list of what they remove/modify here: http://wiki.centos.org/Manuals/ReleaseNotes/CentOS7#head-d58ad86f1b5399bb36755532321b1df4f242a88c
Oracle Linux do things like tweak the Kernel etc.
Biting the hand that feeds IT
