Linux is an open-source operating system that provides various utilities that help professionals to perform their tasks in an efficient and simple way. Linux has been known in the industry as one of the most stable operating systems. Linux OS provides a useful set of preinstalled utilities that allows the user to perform the required tasks easily, it also provides multiple applications and packages that can be installed to be used for different purposes. Using these utilities without limitations and restrictions would allow many of the breakthroughs that can be prevented by applying simple security standards. Securing a Linux machine is an important task and the security issue becomes one of the main priorities when dealing with the machine as a server. Security should be one of the first considerations at all stages of setting up a Linux computer. Securing a Linux machine is a primary responsibility and maintaining a secure environment becomes one of the main priorities when dealing with Log files. This book presents a detailed practical step by step guide to experiment and master Linux security-related tools.