Системное Администрирование L is a collection of instructions, guides, and life hacks for system administrators, network engineers, and anyone interested in setting up network infrastructure. It covers a wide range of topics, including instructions for setting up and administering Windows and Linux operating systems, various services, and network equipment from MikroTik and other manufacturers. The app is available in two versions on Google Play: Системное Администрирование LITE and Системное Администрирование PRO. The PRO version contains unique and valuable information, such as settings for MikroTik equipment, MTCNA, MTCRE, and MTCWE levels. The app also includes a section on how to prepare for interviews, including tips on writing a proper resume and common interview questions. For support and inquiries, users can join a closed Telegram channel.