The book is dedicated to the Linux operating system. Detailed information is provided about its features and capabilities, the ideology of the file system, installation and basic commands, issues of kernel compilation, settings and services. Much attention is paid to organizing various servers and services based on Linux: email, WWW, FTP, INN, Proxy, NTP, as well as network administration problems, ensuring secure operation and other issues. Described are methods for setting up workstations for Linux, including diskless ones, installing and operating graphical environments like X Window on them, as well as configuring modem connections, printers and scanners, debugging interaction with Linux machines of such “exotic” peripherals as pocket computers, mobile phones, TV tuners, etc. The configuration files and directory structure discussed in the book correspond to the Red Hat Linux 7.x distribution, however, with minimal adaptation, all packages mentioned in the book can be installed on any Linux distribution. novice administrators or Linux users.