Xen is a virtual machine monitor for x86 that supports execution of multiple guest operating systems in isolated environments. Xen introduced the concept of paravirtualization. dom0 refers to the host operating system, while domU refers to a guest operating system. Download Documentation Xen is covered in SourceLabs Self-support Suite for Linux and Open Source Java For daily security notifications sign up for Sourcelabs Self-Support Additional Links Xen and rPath Xen and C