FILE SYSTEM IN LINUX

:Linux system Filesystem:

There are two types of File system in Linux.
1. Physical File System
2. Logical File System.

1. Physical file System.
Physical file system means physical files available on Hard disk. E.g. C drive in windows & any directory name like /example in Linux.

2. Logical file system:
Logical file system Hierarchy is as shown above :

“/”

· “/” is called as root directory.It is the top of the file system structure

· All other directories are mounted under it.

“/root”
· This is the default home directory of administrator (i.e. root)

“/home”
· It contains all users home directory.

“/boot”
· This directory contains the kernel the core of Operating System.

· This also contains the files related to booting the system such as the boot loader and the initial ramdisk.

“/sbin”
· It contains administrative commands used by superuser (i.e. root)

“/bin”
· This directory contains commands used by the superuser & the normal user.

“/usr”
· It contains the programs & applications which are available for users (similar to program files on windows.)

“/var”
· It contains variable information such as logs & print queues.

“/dev”
· This directory contains devices nodes through which the operating system can access hardware and software devices on the system.

“/etc”
· It contains all configuration files.

“/proc”
· This directory is a mount point for virtual information about currently running system process.

· This directory is empty until the proc file system is mounted.

“/tmp”
· This directory contains temporary files used by system.

“/opt”
*It contains third party applications.
e.g. Corel word perfect.
Sun star office.

“/media”
- /media/cdRom
- /media/floppy

· It contains default mount points of removable media such as cdrom, floppy disk, pen drive.

“/lib”

* It contains library files need by number of different applications as well as Linux kernel.