Mastering Linux System Administration

Chapter 22Exploring the Virtualization Environment

When something is virtualized, it no longer physically exists, but instead is simulated. In the information technology world, this simulation can apply to computer systems, which is accomplished through special software. Within the last few decades, virtualization has revolutionized the server room. By moving many systems or portions of systems to a virtualized environment, the amount of physical hardware housed in server rooms has been reduced, lowering the overall footprint required. In addition, these reductions have lowered the total amount of electricity needed by these rooms, which is not only better for the environment, but costs less. Server virtualization is a win-win on many levels. ...