System Administration of Operating Systems . Educational and practical manual" by Zakharov is an indispensable resource for everyone who seeks to immerse themselves in the world of system administration and master key aspects of working with operating systems. This manual will be a reliable guide for both novice administrators and experienced professionals who want to update their knowledge and skills. In this tutorial, Zakharov examines in detail all the stages of administration, starting with the basics and ending with more complex concepts. Readers will be able to learn about the principles of installation, configuration and management of operating systems, as well as how to effectively solve emerging problems. The book covers both Windows and Linux, making it a universal tool for learning. Zakharov not only lists commands and functions, but explains how and why they work, which allows the reader not only to remember the material, but also to understand its essence. Who can like this manual? First of all, it will be useful for students of technical specialties who study information technology and system administration . The book will also interest practicing administrators who want to improve their skills, as well as IT professionals seeking to expand their horizons. Even novice users who want to understand the basics of working with operating systems will find a lot of useful information in the book. Topics raised in the book range from basic concepts to complex tasks such as network management, system security, and automation of routine processes. Zakharov focuses on the importance of system administration in today's world, where effective information systems management is becoming the key to business success. He emphasizes that administrators not only solve technical problems, but also play an important role in ensuring the security and stability of organizations. Zakharov's style is characterized by accessibility and clarity of presentation. He is able to explain complex things in simple language, which makes the book understandable even for those who are just starting their way into IT. His previous work has also been recognized for its practical focus and relevance. For example, “Fundamentals of Information Technology” and “Server Administration” have become bestsellers among students and professionals. The book “Systems Administration of Operating Systems” is not just a textbook it is a practical guide that can be used as a reference in everyday work. Zakharov includes many examples, tasks and exercises in the manual, which allows readers to consolidate the knowledge gained in practice. Each section contains useful tips and tricks that will help to avoid common errors and simplify the administration process. If you are looking for a high-quality and up-to-date manual on system administration, this publication will be a real find for you. It will not only enrich your knowledge, but also inspire new achievements in the field of information technology. Read, study and apply the knowledge gained in practice - and you will see how your career in IT will develop rapidly!