From basic to advanced, this book gives you the knowledge of important sections with step by step procedures. The author of this book addresses the fundamentals of UNIX system, commands, shell scripts, internals, sockets and device drivers and focuses on the important elements of maintaining a small, medium or large network of UNIX systems. The book is structured such that the first section deals with shell commands, second section works with shell scripting and how to use it for administration tasks.

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The third and fourth sections are all about Unix internals and inter-process communications, which deŽscribe how to do file and directory mainteŽnance, processes and signals and how you can work with them in an efficient manner. The fifth section of this book provides the basic concepts of sockets, which is basically the communication API in UNIX.

Finally, the last section of this book highlights UNIX device drivers and gives trivial explanations of I/O operation from a user's perspective.