Sorry, didn't really answer the question. Yes, virtualization means one host and multiple guest OS running at the same time each in their own virtual machine. Therefore multiple Linux kernels.
M$oft anounced it's gonna take them another week+ to release a security patch. The business community is reported as outraged. How many programmers do they have over there anyway. Ohhh...lol...
We run it on Fedora distributions but it works on any distribution ...there are differing numbers of setup steps depending upon the distribution you are using .....
We use it in two different ways .... The most basic use is to allow virtualized OS test configurations on the same server. The other application is a bit more esoteric and related to some of our numerical software.
The official MSFT patch for the WMF vulnerability was released last Thursday ( http://www.microsoft.com/athome/security/update/bulletins/200601_WMF.mspx ). I uninstalled the hexblog unofficial patch and installed the MSFT patch this weekend on XPSP1 and 2KSP4 without incident.