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Linux File Structure

Be First!
by January 25, 2012 LINUX

Linux File Structure:

In the Linux file structure files are grouped according to purpose. Ex: commands, data files, documentation. Parts of a Unix directory tree are listed below. All directories are grouped under the root entry “/”. That part of the directory tree is left out of the below diagram. See the FSSTND standard (Filesystem standard).

root – The home directory for the root user

home – Contains the user’s home directories along with directories for services
 ftp
    HTTP
    samba
    george

bin – Commands needed during bootup that might be needed by normal users

sbin – Like bin but commands are not intended for normal users. Commands run by LINUX.

proc – This filesystem is not on a disk. It is a virtual filesystem that exists in the kernels imagination which is memory.
1 – A directory with info about process number 1. Each process has a directory below proc.

usr – Contains all commands, libraries, man pages, games and static files for normal operation.
bin – Almost all user commands. some commands are in /bin or /usr/local/bin.
sbin – System admin commands not needed on the root filesystem. e.g., most server programs.
include – Header files for the C programming language. Should be below /user/lib for consistency.
lib – Unchanging data files for programs and subsystems
local – The place for locally installed software and other files.
man – Manual pages
info – Info documents
doc – Documentation
tmp
X11R6 – The X windows system files. There is a directory similar to usr below this directory.
X386 – Like X11R6 but for X11 release 5

boot – Files used by the bootstrap loader, LILO. Kernel images are often kept here.

lib – Shared libraries needed by the programs on the root filesystem
modules – Loadable kernel modules, especially those needed to boot the system after disasters.

dev – Device files

etc – Configuration files specific to the machine.
skel – When a home directory is created it is initialized with files from this directory
sysconfig – Files that configure the linux system for devices.

var – Contains files that change for mail, news, printers log files, man pages, temp files
file
lib – Files that change while the systeis running normally
local – Variable data for programs installed in /usr/local.
lock – Lock files. Used by a program to indicate it is using a particular device or file
log – Log files from programs such as login and syslog which logs all logins and logouts.
run – Files that contain information about the system that is valid until the system is next booted
spool – Directories for mail, printer spools, news and other spooled work.
tmp – Temporary files that are large or need to exist for longer than they should in /tmp.
catman – A cache for man pages that are formatted on demand

mnt – Mount points for temporary mounts by the system administrator.

tmp – Temporary files. Programs running after bootup should use /var/tmp.

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