Today are two aspects of modern technology Clustering and Virtualization. This site, is dedicated mostly to show that Linux based clustering and virtualization can be very interesting and really challenging. At the beginning I have found this very difficult and not clear to understand, however after spending five thousand hours J working with cluster technologies and configuring some virtual machines I can say I know something about it. This site is designed mostly for my own purposes, however I have published all that info for people who actually have interest in cluster techniques and virtualization. I want them to avoid my mistakes in this matter.