Understanding Hard Links and Inodes in Unix File Systems

Have you ever wondered how files are actually stored, tracked, and deleted on a Unix-like operating system? Behind every file name is a complex system of pointers and index nodes that manage your data. This text-based course demystifies the inner workings of file systems, giving you a clear conceptual foundation of how storage works under the hood. You will transition from simply using files to understanding exactly how the operating system references them on disk. What you'll learn: - Understand the fundamental structure of Unix file systems, including inodes and directory entries - Create and manage hard links using standard terminal commands - Explain the critical differences between hard links, symbolic links, and original files - Trace how the operating system handles file deletion and the unlinking process - Apply safe file management practices to avoid accidental data loss - Use modern diagnostic tools to inspect file metadata and link counts Starting with basic terminology and foundational storage concepts, this course guides you step-by-step through practical command-line operations and file system behavior. You will read detailed explanations, analyze terminal outputs, and gain a robust mental model of storage mechanics. This course is designed specifically for beginners, system administrators, and developers with no prior operating system internals experience. Start building your command-line confidence today.