Linux File System and Directory Structure

As we all know that Linux gets installed under / (root) file system and under / there are different sub directories, each has got separate task and meaning. Here is a list of all those directories and some explanation about them.

/	The root directory, it is a top level directory where our Linux gets installed.
/bin	Binary Directory; it stores all essential commands working under OS.
/boot	As the name suggests this directory holds all the files which are required to boot our Linux OS.
/dev	Hardware and Software device drivers for all the devices.
/etc	It holds all of the basic system configuration files for different services and utilities of Linux.
/home	Home directory for almost every user.
/lib	Program libraries for the Kernel and different command and other utilities.
/media	Mount point for removable devices likes floppy, DVDs, Pen Drives or Zip Drives etc.
/misc	The standard mount point for local directories mounted via the automounter.
/mnt	A legacy mount point; formerly used for removable media.
/net	The standard mount point for network directories mounted via the automounter.
/opt	Common location for third-party applications and their files.
/proc	Currently running kernel-related processes, including device assignments such as IRQ ports, I/O addresses, and DMA channels, as well as kernel configuration settings such as IP forwarding.
/root	The home directory of the root user.
/sbin	System administration commands.
/selinux	Currently configured settings associated with Security Enhanced Linux.
/srv	Commonly used by various network servers on non-Red Hat distributions.
/tftpboot	Included if the TFTP server is installed.
/tmp	Temporary files. By default, Red Hat Enterprise Linux deletes all files in this directory periodically.
/usr	Small programs accessible to all users. Includes many system administration commands and utilities.
/var	Variable data, including log files and printer spools.

So, this is a complete Directory Hierarchy of Linux OS. A person who wants to work with Linux OS he/she should have knowledge of this Directory Structure so He/She can work with it very smoothly.