>rpm -qa > >will tell you what all is installed on the machine at the moment, or >'yum list installed' Just figured that out! I will re-install my way and then without modifying anything and run this command before and after installing Xen. >also, w.r.t your other question on the centos list, xen in centos-5.1 is >already xen-3.1 I have only been using CentOS 5.1 and it wants to install Xen 3.0.3. Does 3.1 maybe exist in a different repo? I haven't enabled any other repo's. Thanks! jlc