The Linux File System Structure Explained

Have you wondered why certain programs are located under /bin, or /sbin, or /usr/bin, or /usr/sbin? For example, less command is located under /usr/bin directory. Why not /bin, or /sbin, or /usr/sbin? What is the different between all these directories?

This article explains the Linux filesystem structures and helps us all to understand the meaning of individual high-level directories.