Filesystem
Everything in Linux can be reduced to a file. Partitions are associated with filesystem device nodes such as /dev/sda1. Hardware components are associated with node files such as /dev/dvd. Detected devices are documented as files in the /proc directory. The Filesystem Hierarchy Standard (FHS) is the official way to organize files in Unix and Linux directories. As with the other sections, this introduction provides only the most basic overview of the FHS. More information is available from the official FHS home page at www.pathname.com/fhs.There are several major directories are associated with all modern Unix/Linux operating systems. Files, drivers, kernels, logs, programs, utilities, and more are organized in these directories. They way these components are organized on storage media is known as a filesystem. It’s based on the way the filesystem is formatted, and the directory where that filesystem is mounted. The FHS makes it easier for users of other Unix-based operating systems to understand the basics of Linux.
