Linux Basics for Hackers is a beginner-friendly guide that teaches the Linux skills needed for cybersecurity, ethical hacking, and penetration testing. The second edition introduces readers to the Linux operating system, command-line navigation, file management, permissions, networking, shell scripting, package management, and system administration. It also covers topics commonly encountered in security work, such as configuring services, managing users, working with logs, and automating tasks. Through hands-on examples and practical exercises, the book helps readers build a solid foundation in Linux, enabling them to use security-focused distributions and understand the operating system that underpins many cybersecurity tools and environments.