The book "Nmap Reference Manual (Man Page)" is a detailed instruction manual that will help the user familiarize himself with the functions and capabilities of the Nmap program. Nmap is a powerful tool for network scanning, port discovery and system security determination. The details book describes various commands, parameters and options of the program, which will allow the reader to study its operation in detail. The author provides practical examples of using Nmap for a variety of tasks, from scanning your own network to analyzing website security. This book will become an indispensable reference for anyone interested in computer security and network administration.