Filesystem Hierarchy Standard

The Filesystem Hierarchy Standard (FHS) defines the main directories and their contents in Linux operating systems including Ubuntu. It is a formalization and extension of the BSD Unix directory structure filesystem hierarchy. Linux began the work to restructure the directory and structure directory  of Linux in 1993. Named File System Standard (FSSTND), it was released in February 1994. In 1995 the goal changed to form a definition of a more comprehensive standard that applies not only Linux but to other Unix-like systems too. The name was changed to File System Hierarchy Standard, or FHS at that time.

FSH contents

 * /dev/ Device files
 * /etc/ Directory
 * /lib/ Directory
 * /mnt/ Directory
 * /opt/ Directory
 * /proc/ Directory
 * /sbin/ Directory
 * /usr/local/ Directory
 * /usr/ Directory
 * /var/ Directory

The current version is 2.3. It was announced on 29 January 2004.

Links

 * http://www.pathname.com/fhs/