[Review] Virtualization Essentials, 2nd Edition (Matthew Portnoy) Summarized.

Virtualization Essentials, 2nd Edition (Matthew Portnoy)

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Virtualization Essentials, 2nd Edition is an introductory technical guide by IT professional Matthew Portnoy, published by Sybex in 2016. Aimed at students, aspiring administrators, and IT practitioners entering virtualization-focused environments, it explains how a single physical system can host and manage multiple isolated virtual machines. The book belongs to the practical infrastructure and systems-administration genre rather than to vendor-neutral theory alone: it combines conceptual explanations with guided configuration and management tasks. Its scope includes virtualization software, virtual-machine architecture, hypervisors, and the allocation of processor, memory, storage, and network resources. It also addresses migration from physical machines, application deployment, and availability measures that protect workloads, hosts, and broader environments. The second edition positions these fundamentals in relation to cloud computing and DevOps, where virtualized resources are central to flexible infrastructure. Its main purpose is to give beginners a usable conceptual framework and enough hands-on orientation to understand how virtualized systems are built, operated, and protected.