The book will be useful for any level of readers - both for those who have just become interested in Linux, and for those who want to expand their skills in using this operating system. Everyone will find something useful and in demand here! It is important that one of the distribution kits (along with Ubuntu) on which work in Linux is shown is the Russian Astra Linux, certified and recommended for use in Russia.

Linux is now very popular among ordinary users , and from large corporations - such as Microsoft, IBM, etc. This book contains both theoretical and practical materials, i.e. theory and practice will be combined into one whole - there will be no separate large and boring theoretical chapters.

The book can be divided into four parts. In the first part we will talk about installing the system, look at logging in and shutting down, do some steps to configure the system, look at the basics of the command line;

The second part is devoted to Internet settings, installing software, and a review of popular programs for Linux - you will learn not only how to install programs, but also which program to install, which is no less important. The third part will take a detailed look at local administration in Linux: managing file systems; loading the operating system; system processes and main user groups;

And, of course, what is Linux without a server? The fourth part is devoted to the issues of administering a Linux server on a local network - it will show how to configure DNS, SSH, DHCP, FTP servers; Let's talk about server integration into a Windows network; about server security; We’ll also set up a firewall and learn how to protect the server from network attacks.