1. بسم الله الرحمن الرحيم What is an operating system? 1- An interface between the user and Hardware 2- Control Program 3- Resource Manager

2. Main function of Operating System 1- process Management 2- Memory Management 3- File Management 4- I/o Management

3. Example of O.S 1- Dos 2- Windows 3- Linux 4- OS/2 5- Mac

4. 10 years ago Linux IBM Linux Sun Corel DEC DELL

5. Linux ( within six words ) :- Open source. Multitask. Multi-user. Virtual memory. Shared libraries. Network (TCP/IP).

6. Linus Torvalds History Date : Name: Job : Idea : 1945 Einstein Head of Microsoft Family Game http://www.li.org/linuxhistory.php http://www.linux10.org/history/ http://www.li.org/linuxhistory.php http://www.linux10.org/history/ 1967 1982 1992     Student Free OS. Bill Gate  Scantiest 

7. Linux Features:- CPUs. ( x86, I64, SPARC, Motorola, PowerPC, RISC,.. etc. ) File systems. ( Win2000, OS/2, Mac, HP-UX,.. etc.) Applications. ( UNIX, Windows, DOS, Mac, OS/2,.. etc.) PC Hardware. ( Audio, Video, FM, PCMCIA, USB,.. etc. ) Security. ( Files, Data, network) GUI ( Graphic User Interface ). ( KDE, GNOME,.. etc.)

8. Between Cost. Viruses. Stability. Monopoly. Source. Linux & Windows Free XP 300$ 1 - 10 58000 or more Very …??? No …??? Free (For ever) Unitl now ???

9. General system structure of UNIX Utilities & Tools Shell Kernel Hardware User & Applications

11. وتوتة توتة خلصت الحدوتة وتوتة توتة خلصت الحدوتة