[ Thanks to Steven J.
Vaughan-Nichols for this link. ]
“I’ve been using RHEL, and its twins, CentOS and Oracle
Unbreakable Linux since day one, and I like them a lot for business
server use. Of all these releases, I think RHEL 5.4 is the most
impressive of the lot. Why? Well, I’ll tell you.“1) Baked in virtualization. This edition of RHEL incorporates
KVM (Kernel-based Virtual Machine). KVM, unlike VMware or Citrix
Systems’ XenServer, isn’t an add-on virtualization program. It’s
actually part of the operating system. Indeed, as the name
suggests, it’s built right in the Linux kernel.”