This courselet introduces the concept of hard links in Linux file systems, illustrating how multiple filenames can point to the same underlying data through shared inodes. Through hands-on exercises, learners will create and inspect hard links using commands like ln, ls, and stat, observe how content modifications reflect across links, and understand the impact of file deletion. The courselet emphasizes inode-level behavior and reinforces how Linux manages file references, offering valuable insights into file system structure and data integrity.