What is the structure called that defines the file system hierarchy in Linux?

The structure that defines the file system hierarchy in Linux is known as the Filesystem Hierarchy Standard (FHS). This standard outlines the directory structure and directory contents in Unix-like operating systems, including Linux. It specifies where files and directories should be located, helping maintain consistency across different Linux distributions. For example, it designates /bin for essential user binaries, /etc for configuration files, and /home for user home directories, among others.

Understanding the FHS is critical for navigating and managing a Linux system, as it provides guidelines that developers and system administrators can follow to ensure compatibility and usability across various environments. This standardization facilitates easier file management, scripting, and system maintenance, ensuring that users can find important files and directories intuitively.