1. Spring 2007Introduction to OS1 IT 3423: Operating System Concepts and Administration Instructor: Wayne (Weizheng) Zhou wzhou2@spsu.edu http://it.spsu.edu/wzhou Office No.: J388 Office hours: MW 5:30pm - 7:45pm (or by appointment)

2. Spring 2007Introduction to OS2 COURSE DESCRIPTION: An introduction to basic operating system principles Different types of operating systems and their administrations are studied Learning basic system administering skills

3. Spring 2007Introduction to OS3 COURSE OBJECTIVE: The goal for students in this course is to learn the concepts the OSs and the basic administering skills. This course will cover basic OS concepts and the essential aspects of installing, configuring, networking, and administering the operating systems including the Windows Server 2003 and the Fedora Linux.

4. Spring 2007Introduction to OS4 COURSE OBJECTIVE: cont The students will learn to work with domains, Active Directory, virtual private networking (VPN), Terminal Services, Internet Information Services (IIS), Domain Name Service, and other features including security, file systems, DHCP, and printing in Windows Server 2003 and Fedora.

5. Spring 2007Introduction to OS5 HOMEWORK ASSIGNMENTS: All assignments will be list on the class schedule online, as well as on the assignment itself. The assignments will be accessible from anywhere on the Internet. There are five homework assignments will be assigned in this semester.

6. Spring 2007Introduction to OS6 GRADING: Homework (5 @ 4% ea.)20% Labs16% Project 9% Exam 1, 2 (Windows)30% Exam 3 (Linux)25%

7. Spring 2007Introduction to OS7 Introduction to Operating System (OS) A collection of system programs that provides an intermediate interface between the computer hardware and computer user. It provides software and hardware management.

8. Spring 2007Introduction to OS8 How an OS works? Environment- in which the OS provides the look and feel of the system. Most OS includes a number of functionally separate pieces. 1. Kernel- It’s responsible for managing all the other system programs. It oversees the whole process of operating the computer system. 2. Shell- It allows the user to operate the system

9. Spring 2007Introduction to OS9 System components

10. Spring 2007Introduction to OS10 A list of Operating Systems DOS Windows Linux UNIX Novell Mac OS

11. Spring 2007Introduction to OS11 Types of User Interfaces The OS must provide a way for humans to communicate with machine-User interface(UI). 1. Command-Line User Interface It uses the keyboard to communicate with the OS and the computer. 2. Graphical User Interface(GUI) It represents commands as a number of small pictures called icons.

12. Spring 2007Introduction to OS12 Hardware CPU-the Central processing unit It is the brain of the computer. RAM-random access memory It functions as the principal workspace of the computer ROM-read-only memory It is programmed once at the factory

13. Spring 2007Introduction to OS13 Hardware:cont. BIOS-basic input-output system It is a ROM chip that has programmed with the instructions needed to begin the boot process. Motherboard-the main circuit board in the computer Keyboard-It used to input information for the computer’s programs Pointing Device

14. Spring 2007Introduction to OS14 Classifications of Hardware Components 4 categories: input, output, processing, and storage 1.Input components-allow the user to communicate information to the computer. include: Keyboard, Mouse, Scanner, and Voice devices

15. Spring 2007Introduction to OS15 Classifications of Hardware Components: cont. Output components-allow the communication of information back to the user include: Monitor and Printer devices

16. Spring 2007Introduction to OS16 Classifications of Hardware Components: cont. Processing-the CPU is used to process information. Storage devices-used to store information. include: Tapes, Disks, Hard Disks, Zip, and Memory cards

17. Spring 2007Introduction to OS17 Basic Functionalities of the OS Including: 1. Resource Management 2. Memory Management 3. File Management

18. Spring 2007Introduction to OS18 Resource Management Starting Up When the computer is turned on, it is set to look at the starting address for the BIOS. It then reads the BIOS, the list of all instructions it needs to get going. The last instruction in the BIOS is to start reading the OS

19. Spring 2007Introduction to OS19 Resource Management: cont. Shutting Down Date needs to be put away Settings need to be stored Connections with devices and the network need to be terminated

20. Spring 2007Introduction to OS20 Resource Management: cont. Multitasking and Allocating CPU cycles Compute allows user to do more than one thing at the same time But CPU only do one thing at a time- only one program is running at any instance in time.

21. Spring 2007Introduction to OS21 Resource Management: cont. The CPU counts the number of programs running and divides that number into one second

22. Spring 2007Introduction to OS22 Memory Management After the computer is up and running, the OS needs to allocate and manage memory. RAM resource – controlled by OS without conflicting Some are used by OS Some are used by other running programs

23. Spring 2007Introduction to OS23 Memory Management If available RAM runs out: Report to user and stop the process Use virtual memory

24. Spring 2007Introduction to OS24 File Management Files need to be stored, retrieved, moved, duplicated, changed, and deleted. The OS will perform all these functions.

25. Spring 2007Introduction to OS25 File Management: cont. File types: Programs – applications Documents – text, images, sounds, … Containers – folders, directories

26. Spring 2007Introduction to OS26 File Management: cont. Identifying Files and Types Identified by extension name – DOS, Windows, UNIX Identified by information that is hidden from user, but which is used by the OS – Mac OS

27. Spring 2007Introduction to OS27 File Management: cont. Navigating and Locating Files Group files together into folders (containers) Can use search function to locate files if you know the files’ name

28. Spring 2007Introduction to OS28 File Management: cont. Copying and Moving Files Between folders / disks Removing Files Between HD and removable media