Operating systems are an essential part of any computer system. Similarly, a course on operating systems is an essential part of any computer-science education. This field is undergoing rapid change, as computers are now prevalent in virtually every application, from games for children through the most sophisticated planning tools for governments and multinational firms. Yet the fundamental concepts remain fairly clear, and it is on these that we base this book.
This book could be downloaded from the attachment below in this thread, all due "Credit" to the author.
Following are the contents of this book:
PROTECTION AND SECURITY*
The Linux System
Influential Operating Systems
This book is a sure shot "insurance" to excel in your examinations.