Linux system structure

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Linux system structure
1. Kernel: basic core of Linux system.
2. Modules: add on package
3. Lib: API, glibc, x-windows, JVM
4. App:
    a. Shell command interface,
    b. KDE, GUI, Graphic interface
 
Unix
1. Sys V: sh
2. BSD(FreeBSD): csh --> ksh / tchsh / zsh
Linux: sh / tchsh
 

Kernel
Check command:
1. ls -l /boot/vm...
2. uname -r
 
Source code: www.kernel.org
 
Kernel Version
1. odd number:   develop version such as 2.5, 2.3
2. even number:  stable version such as 2.6, 2.4
 
Module
Check command: ls /lib/modules/<kernel version>/kernel/
Support file system: ls /lib/modules<kernel version>/kernel/fs/

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