Penetration Testing: A Hands-On Introduction to Hacking is a practical guide to ethical hacking that teaches readers how to identify, assess, and responsibly exploit security vulnerabilities in computer systems and networks. Starting with the fundamentals of networking, Linux, scripting, and security concepts, the book progresses to reconnaissance, vulnerability scanning, exploitation, post-exploitation, web application testing, wireless security, password attacks, and social engineering. Through hands-on labs and real-world examples, it equips aspiring penetration testers, cybersecurity students, and IT professionals with the knowledge and techniques needed to perform authorized security assessments while promoting responsible and ethical security practices.