This book is for three major audiences. First, systems administrators who work with either Linux, Windows, or Mac OS X. This covers those who work on bare-metal machines, virtual infrastructure, or cloud-based environments. Then, network administrators, those who work on distributed proprietary network equipment. Finally, DevOps. This book offers a good understanding of how the system they are going to deploy their application in will behave, enabling them to code accordingly or suggest modifications that can benefit their applications.