CHAPTER 8 OPERATING SYSTEMS & UTILITIES. Chapter 8 Objectives

CHAPTER 8

OPERATING SYSTEMS & UTILITIES

Chapter 8 Objectives

Identify the types of system software Identify the types of system software

Describe the functions of an operating system Describe the functions of an

operating system

Discuss ways that some operating systems help administrators control a network andadminister security

Discuss ways that some operating systems help administrators control a network andadminister security

Explain the purpose of theutilities included with most operating systems Explain the purpose of theutilities included with most operating systems

Linux, Unix, MAC operating systems Linux, Unix, MAC operating systems

Identify various network operating systems

Identify various network operating systems

Identify devices that use several

embeddedoperating systems Identify devices that use several

embeddedoperating systems

Explain the purpose of various

utilityprograms Explain the purpose of various

utilityprograms

Next A brief look at the new Windows Operating System

Windows 2008 (Vista)

A brief look at the new Windows Operating System Windows 2008 (Vista)

System Software (OS & Utilities)

What is system software?

Next

p. 8.02

Operating system (OS) Operating system (OS) (sometimes called the

(sometimes called theplatformplatform)) coordinates all activities coordinates all activities

among computer among computer hardware hardware resources resources Programs that Programs that control operation control operation of computer of computer

Two types are Two types are operating systems operating systems and utility programs and utility programs

Operating Systems ( functions)

What are the functions of an operating system?

Next

p. 8.02 Fig. 8-1

monitor performance

provide a user interface

provide file management and other utilities establish an Internet connection control a network administer security

start the computer manage programs

schedule jobs and configure devices

manage memory

Operating Systems (Cross-platform apps)

What is across-platform application? (WordPerfect 14)

Next p. 8.03 Operating System/ Platform A Operating System/ Platform B Operating System/ Platform C Operating System/ Platform D Application

 Runs identically on multiple operating systems  Operating system that computer uses is sometimes

called theplatform

Operating Systems

Where is the operating system located? Resides on computer’s hard

disk in most cases

May reside on a ROM chip on handheld computers

p.8.3 Next

Various operating systems often are not compatible

(Apple MACs vs PCs)

Some types of computers may have

different operating systems Different sizes of computers typically use different operating systems

Windows OS Users

Windows Vista 180 million copies sold (June 2008) Vista Service Pack 1 (SP1) [released in March 2008] Windows XP 335 million users

Windows 2000 100 million users Windows (older versions) 15 million users

Windows 7 due out late 2009 (with touch screen technology)

Worldwide: 800 million users of Windows OS

Source: Washington Post, Page D-1, Nov 29, 2007

New CEO at Microsoft (as of July 1,2008)

Microsoft’s Ray Ozzie replaced Bill Gates as the lead

man and chief software architect at Microsoft. Ozzie invented Lotus Notes and Grove before selling it to Microsoft for $120 million and he plans to lead Microsoft into the online-services era which he calls

“A time of great turbulence and potential change in the industry.”

Windows Key Improvements

Windows Vista

Greater security, revised user interface Improved file search

Windows XP

Better hardware/software capabilities Better wireless networking

Windows 2000 Greater reliability

Better tools for large network administration

Source: Washington Post, Page D-1, Nov 29, 2006

Windows Vista Requirements

A Windows Vista Premium Ready PC includes at least: 1 GHz 32-bit (x86) or 64-bit (x64) processor.

1 GB of system memory.

40 GB of hard drive capacity with 15 GB free space. DVD-ROM Drive.

Audio output capability. Internet access capability

Operating Systems (Cold & Warm boots)

 Warm boot Restarting computer that is powered on  Ctrl-Alt-Delete  Or Press Reset Button

Warm boot from Windows desktop

Warm boot from system unit

 Process of starting or restarting a computer

Operating System (Win XP Task Manager)

Using the Task Manager in Windows XP

 Press Ctrl-Alt-Delete buttons

 Press Task Manager button

 From the list, select a task to End or Switch to

 You may also Create a New task (under the File tab in the Task Manager window)

Operating System Functions (Booting)

How does a personal computer boot up?

Next

p. 8.05 Fig. 8-4

Step 1.Power supply sends signal to com-ponents in system unit

Step 4.Results of POST are compared with data in CMOS chip

Step 2.Processor accesses BIOS to start computer

Step 3.BIOS runs tests, called the POST, to check components such as mouse, keyboard, and adapter cards

Step 5.BIOS looks for system files in floppy disk drive and then hard disk

Step 6.Kernel (core) of operating system loads into RAM

Step 7.Operating system in memory takes control of computer

Step 8.Operating system loads configuration information and displays desktop on screen

Step 9.Operating system executes programs in StartUp folder

Step 10.Click Start to display list of applications you can run

Memory resident

• Remains in memory while the computer is running

• The kernel is memory resident

Operating System Functions

What is the kernel?

The core of an operating system

 Manages memory and devices

 Maintains the computers clocks

 Starts applications

 Assigns the computers resources, such as devices, programs, data, and information

Each time you boot a computer, the kernel and other frequently used operating system instructions are loaded

 Loading a file means the file is copied from the hard disk to the computer's memory

p.8. 4 Next

Nonresident

• Instructions remain on the hard disk until they are needed

• Other parts of the operating system are nonresident

Step 7

Operating System Functions

p.8. 5 Fig. 8-4 Next

Registry

Several files that contain the system configuration

information Registry is constantly

accessed during the computer's operation

Regedit Editor

StartUp folder Contains a list of programs

that open automatically when you boot the computer

Managing Startup Programs Menu

You may use: MsConfig

Click Start, click Run, Type in MsConfig, click OK, Click the Startup tab.

Carefully uncheck the programs you do not want to

Operating System Functions ( GU I )

What is a (graphical )user interface?

Next

p. 8.08 Fig. 8-6

command-line interface (DOS)

 Controls how you enter data and instructions and how information displays on screen

 Types: Command-Line, Menu-Driven, GUI

Operating System Functions (GUI)

What is a graphical user interface (GUI)?

Next

p. 8.08 Fig. 8-7

 User interacts with menus and visual images such as icons and buttons

 Foregroundcontains application you are using  Backgroundcontains

programs that are running but are not in use

Operating System Functions

What is single user/ multitasking?

Next

p. 8.09 Fig. 8-8

 Working on two or more programs that reside in memory at same time multiple programs running all running processes Has duplicate components such as processors, memory, and disk drives Enables two or

more users to run programs simultaneously

Continues to operate when one of its components

fails

Operating System Functions

What are other program management features of operating systems?

Next

p. 8.10

Can support two or more processors

running programs at same time

Fault

Fault--tolerant computerstolerant computers Tandem NonStop (HP) Tandem NonStop (HP) Multiuser Multiuser Multiprocessing Multiprocessing

Operating System Functions

What is memory management?

Next

p. 8.10 Fig. 8-9

Step 1.The operating system transfers the least recently used data and program instructions to disk because memory is needed for other functions.

Step 2.The operating system transfers data and program instructions from disk to memory when they are needed.  Optimizing use of random access memory (RAM)

 Withvirtual memory (VM), portion of hard disk is allocated to function as RAM

Operating System Functions

What are some virtual memory terms?

p.8.10 Next

Swap file The area of the hard disk used

for virtual memory Paging The technique of swapping items between memory and storage Thrashing When an operating system spends much

of its time paging, instead of executing application software Page (64KB)

The amount of data and program

instructions that can swap at a

Operating System Functions

How does an operating system schedule jobs?

Next p. 8.11 Transferring items Transferring items between storage between storage and memory and memory Sending Sending information information to output device to output device Processing Processing instructions instructions Receiving data Receiving data from input device from input device

The OS adjusts schedule based on

a job’s priority

A

Ajobjobis an operationis an operation the processor manages the processor manages

OS tasks to be performed:

Operating System Functions

What is spooling?

Next

p. 8.11 Fig. 8-10

 Sending print jobs to a memory or disk buffer instead of directly to printer

 Print jobs line up in a memory or disk

Operating System Functions

What is a device driver?

Next p. 8.12 Device Device Driver Driver Program that Program that tells operating system tells operating system how to communicate how to communicate

with device with device

With

WithPlug and PlayPlug and Play,, operating system operating system automatically configures automatically configures

new devices as you new devices as you

install them install them

Also called Also calleddriverdriver

Operating System Functions

What is a device driver?

p.8.11 Next Click to view Web Link then click Device Drivers

device driver

A small program that tells the operating system how to communicate with a device

Also called a driver

Each device on a computer requires its own specific driver

Operating System Functions

How do you install a device driver?

Next

p. 8.12 Fig. 8-11

Step 1.Open Control Panel window. Point to Printers and Other Hardware link.

Step 2.Click Printers and Other Hardware link. Point to Add a printer link.

Step 3.Click Add a printer link. Follow on-screen instructions.

Step 4.Add Printer Wizard searches for Plug and Play printers on your computer. If it finds any such printers, it installs them.

Step 5.If Add Printer Wizard cannot find any Plug and Play printers, you can select type of printer you want to install. An on-screen prompt may ask you to insert floppy disk, CD-ROM or DVD-ROM that contains necessary driver files to complete the installation of printer.

Operating System Functions

What is Plug and Play? (PnP)

The computer can recognize a new device an assist you in its installation by loading the necessary drivers automatically and checking for conflicts with other devices (First appeared with Windows 95)

Supported by most devices and operating systems today

p.8. 13 Next Click to view Web Link then click Plug and Play

Operating System Functions IRQs

What is an interrupt request ((IRQ)?

A communications line between a device and the processors Most PCs have at least 16 IRQs for the ISA bus, numbered 0

through 15 and more for the PCI bus

p.8. 13Fig. 8-12 Next  IRQs are assigned during installation

Interrupt Assignments in Windows XP

(1) Right-click My Computer (2) Click Manage

(3) Click Device Manager (4) Click View menu

(5) Click Resources by Connection (6) Click on Interrupt Request (IRQ)

IRQ Assignments (Windows XP)

Operating System Functions

How do you establish an Internet connection?

Next

p. 8.13 Fig. 8-12

 Windows XP includes New Connection Wizard  Guides user through setting up connection between

Operating System Functions

How does an operating system monitor performance?

Next

p. 8.14 Fig. 8-13

 Provides program, calledperformance monitor, that assesses and reports information about system resources and devices  Ctrl-Alt-Del to invoke the Task Manager Click Performance tab

Operating System Functions

What is a network operating system?

Next

p. 8.14 Fig. 8-14

 Allows users to share printer, Internet access, files, and programs on a network

 Administers security by establishing user name and password for each user

Utility Programs

What is a utility program?

Next

p. 8.15 Fig. 8-15

 System software that performs maintenance-type tasks

 Also called a

utility

 Norton System Works

Operating System Utility Programs

What is a file manager? (Windows Explorer)

Next

p. 8.16 Figs. 8-16–8-17

 Performs functions such as copying, renaming, deleting, and moving files

 Image viewer

displays contents of graphics file when you double click on it

Operating System Utility Programs

What is anuninstaller program?

Next p. 8.17 In Windows XP, In Windows XP, uninstaller is in Add/Remove uninstaller is in Add/Remove Programs in Control Panel Programs in Control Panel Removes a

Removes a program and program and all associated files all associated files

Try a good freeware uninstaller: www.zsoft.dk if Windows cannot do it

Operating System Utility Programs

ScanDisk & Disk Cleanup & Disk Defragmenter

Next

p. 8.17 Fig. 8-18

 ScanDisk: Detects and corrects problems on hard disks or floppy disks. (Windows 98/Me)

 Disk Cleanup: Searches for and removes unnecessary files

 Disk Defragmenter puts contiguous sectors together

Operating System Utility (Disk Defrag)

What is a Disk Defragmenter ?

Next

p. 8.17 Fig. 8-19

file before defragmenting fragmented disk

file after defragmenting

 Reorganizes files and unused space into contiguous sectors on hard disk so programs run faster.

Automatic Disk Defragmentation Utility

 Diskeeper:

 Set it and forget it defrag scheduling

Operating System Utility Programs

What is a diagnostic utility?

Next

p. 8.18 Fig. 8-20

 Compiles technical information about hardware and some software

 Prepares report outlining potential system problems

 Example: Dr. Watson

 Located under Accessories,

System Tools, System Information, Tools

Operating System Utility Programs

What is a backup utility?

Next

p. 415 Fig. 8-20

 Copies selected files or entire hard disk onto another storage medium

 Most compress files during backup to require less storage space

 Look in System Tools in

Utility Programs: File Compression

What is a file compression utility?

Next

p. 8.29 Fig. 8-39

 Shrinks size of files to free up room and improve performance

 Compressed files are sometimes called

zipped files

 Two popular utilities: PKZIPTM and WinZip®

 Visit www.WinZip.com  Visit www.pkware.com

Another one:

 Gzip (.tgz file extension)

 Visit: http://www.gzip.org/

Operating System Utility Programs

What is a screen saver? (not needed for LCDs)

Next

p. 8.18 Fig. 8-22

 Causes monitor’s screen to display moving

image or blank screen if there is no activity for a specified time. Prevents ghosting or burn-in on back of phosphor screen

 To secure computer; The user configures screen saver to require password to

deactivate the screen saver.

Device-dependent

Runs only on specific type of computer

Types of Operating Systems

Characteristics of operating systems software

Next

p. 8.19

Downward compatible

Works with application software written for

earlier version of operating system

Upward compatible

Runs on new versions of operating system

Proprietary software

Privately owned and limited to specific vendor

or computer model Device-independent Runs on many manufacturers’ computers Stand Alone

Types of Operating Systems

What are three categories of operating systems?

Next

p. 8.19

Embedded

Types of Operating Systems

What are three categories of operating systems? Network Embedded Stand alone p.8.17 Fig. 8-18 Next

Others not on slide: Windows XP with SP2 Windows Server 2003 Windows Server 2008

Operating Systems

What isDOS (Disk Operating System)?

[ MS-DOS (Microsoft) and PC-DOS (for IBM) ] All opperating systems are based on UNIX

Next p. 8.20 D D Developed in Developed in early the1980s early the1980s for personal for personal computers computers O O Used command Used command--lineline

interface when first interface when first

developed, later developed, later included menus included menus S S

Hardly used today Hardly used today because it does because it does not offer a GUI not offer a GUI

commands entered by user commands entered by user

Operating Systems DOS

What is DOS (Disk Operating System)?

Refers to several single user operating systems developed in the early 1980s for personal computers

Two more widely used versions were PC-DOS and MS-DOS, both developed by Microsoft p.8.17 Next  Used a command line interface and added a menu-driven interface in later versions

Various Versions of Windows

p. 417 Fig. 8-23

Windows Version Year Released

Windows 3.x 1990

Windows NT 3.1 1993

Windows 95 1995

Windows NT Workstation 4.0 1996

Windows 98 1998

Windows Millennium Edition 2000

Windows 2000 Professional 2000

Windows XP 2001

Windows XP SP2 2004

Windows Vista

 Microsoft’s fastest, most reliable Windows

operating system before Vista

Windows XP

drivers)

FAT32 or NTFS, Win FS

Windows Operating Systems

Features of most Windows operating systems

p.8.18 Next Active Desktop™ Taskbar/toolbars Windows Explorer has a Web browser look and feel

increased speed Tune-Up Wizard Universal Serial Bus 2.0 Registry Checker Hardware support Accessibility Settings Wizard Multiple display support

Supported the Universal Serial

Bus (USB)

Older Operating Systems: Windows 98

What are features of Windows 98?

It is an upgrade from Windows 95 More integrated with the Internet Included Internet Explorer, a popular

Web browser

A file manager, Windows Explorer, had a Web browser look and feel An Active Desktop™ interface

allowing icons and file names to work similar to Web links

p.8.18 Next Support for multimedia technologies such as DVD and Web TV™

Older Operating Systems: Windows Me

An operating system that has features specifically for the home users

Also called Windows Me Included multimedia features; Win Me is an upgrade to Win 98 p.8.20 Fig. 8-21 Next What is Windows Me ?

Windows 2000 Operating System

What is Windows 2000 Professional?

Upgrade to the Windows NT 4.0 Workstation operating system Complete multitasking client operating system that has a GUI NT 5.0 is really Server 2003 p.8.18 Fig. 8-19 Next Click to view video Windows XP Features

New Appearance and Performance Network/user Administration Help and Support

Communications and the Web Firewall setup software

Windows XP (eXceptional Performance)

Features

What are some features of Windows XP?

Next

A few Window XP Keyboard Commands

 Minimize a window: Windows key + M key

 Minimize all windows: Windows key + D key

 Maximize a window: Alt + Space + x

 Minimize a window: Alt + Space + n

 Bookmark a Help topic: Shift + F10 keys

 Display the Start menu: Ctrl + Esc keys

 Close a number of open windows: Alt + F4

 Windows Security: Ctrl + Alt + Del

 Change passwords (on a networked PC):

Ctrl – Alt – Esc & Click “Change Password” tab

 Task Manager: Shift + Ctrl + Esc

WindowsXP File Association Settings

In Windows XP, click Start, Settings, Control Panel Click Tools, Folder Options and click the File Types tab.

Below Registered File Types, you will see a long list of extensions like XLS and ZIP (at the end of the list) A file extension tells Windows what type of file it is. Scroll down the list and find the extension for the file type you want to open with a different application. In the lower half of the Window, you will see the name and icon of the associated application for the file type.

 Successor to Windows XP, containing a new interface and new / enhanced features

Windows Vista Operating System

What is Windows Vista?

Next

p. 419 Fig. 8-26

 Available in 8 editions, grouped into Home and Business categories  http://www.hiptechblog.co m/2006/02/20/its-official- 8-different-flavors-of-windows-vista/

Windows Vista Features

Reliability and Performance Security

Information Management Appearance and Navigation Communications and the Internet

Windows Vista Operating System

What are some features of Windows Vista?

Next

Windows Server 2003 Family of Products

 Windows Server 2003, Small Business Server for businesses with less than 75 users.

 Windows Server 2003, Standard Edition for small-to-medium-sized business networks.

 Windows Server 2003, Enterprise Edition for medium and large sized business networks with e-commerce applications.  Windows Server 2003, Datacenter Edition for businesses with

huge volumes of transactions and large-scale databases.  Windows Server 2003, Web Services Edition for Web server

and Web hosting businesses.

Windows Server 2008

Faster and more secure !

Released: Last week of February 2008 For more information, visit:

http://www.microsoft.com/windowsserver/longhorn/ev aluation/b2faq.mspx

Operating Systems: Mac OS X

What is Mac OS X? (Mac OS X Leopard)

Next

p. 8.22 Fig. 8-28

 Available only for computers manufactured by Apple

 Macintosh operating system has been a model for most GUIs

http://www.apple.com/macosx/leopard/

Operating Systems: UNIX

What is UNIX?

Next

p. 8.23 Fig. 8-30

 Used by power users because of its flexibility and power  Most versions offer GUI  Both a stand-alone and a network operating system

Operating Systems: UNIX

 Developed in early 1970’s by AT&T’s Bell Labs

 Several versions of UNIX exist, each slightly different.

 Some versions have a command-line interface, but most offer a GUI.

 UNIX runs on all types of computers.

 UNIX is the basis for ALL operating systems

Common Unix Commands

Visit:

Operating Systems Linux

What is Linux?

Next

p. 8.24 Fig. 8-31

Red Hat provides a version of Linux called Red Hat Linux. The GNOME graphical user interface is shown in this example.

 Popular, free, multitasking UNIX-type operating system  Open-source softwaree— code is available to public  Both a stand-alone and a network operating system

Red Hat Linux

http://www.redhat.com/docs/manuals/linux/RHL-9-Manual/getting-started-guide/

Embedded Operating Systems

What is Embedded Linux?

Next

p. 425 Fig. 8-34

 Scaled-down Linux operating system designed for PDAs, smart phones, smart watches, set-top boxes, Internet telephones, and other devices

 Offers many PIM functions

 PIM  Personal Information Mgt  http://www.linuxdevices.com/

Linux: Another Version: Ubuntu 7.10

What is Ubuntu Linux?

Next

p. 425 Fig. 8-34

 www.ubuntu.com (from South Africa)

 “oo-boon-tu” means “humanity toward others” in South Africa’s Zulu an Xhosa languages)  A few features:

 No charge to install or update it.

 Focus on simplicity

 Cannot run Windows programs

 Recognizes most external devices (such as USB flash drives)

Operating Systems Linux

 Some versions of Linux are command-line

 Some versions are GUI interfaces

 Commercial: Red Hat Linux software

 The two most popular GUIs for Linux are: GNOME and KDE (Keyboard Desktop Environment)

 Motorola Corp has created mobile phones running the Linux operating system

Operating Systems Linux

 Linux is network-friendly: It is capable of acting as

client and/or server to any of the popular operating systems in use today. It is quite capable of being used as an OS by Internet Service Providers (ISPs)

 Linux is a multi-user system which has advantages

even for an OS where only one or two people will be using it.

Operating Systems Linux

 Linux is Open Source: that means that for the entire

base system, which includes the kernel, the GNU tools, and all the basic utilities. Programmers and users have access to the source code as well as the right to modify it.

 Linux is Backwards-Compatible: has superb

support for older hardware. In fact, it is often easier to find hardware support for 80486-era hardware than the latest gizmos to hit the market. This is because the device driver software authors need time to write and test the drivers.

A Look at Linux Commands

Visit:

Linux versus Windows

What is Microsoft Windows?

The Microsoft Corporation began development of the Interface Manager (later named Microsoft Windows) in the fall of 1981

Windows 1.0 was finally released to the market in 1985, promising users an easy-to-use graphical interface for consumers.

Several others versions of Windows have been produced

 2.0, 3.1, 3.11, 95, 98, ME – DOS Based (Layered-Based)

 NT, 2000, XP, 2003, Project Longhorn – NT Technology (Kernel-Based)

Microsoft Windows - Pros

User-Friendly Generally Stable

 Windows 2000/XP are considered to be extremely stable and rarely crash.

 Home users can navigate Windows without fear of losing their work because they forgot to save. Hardware Support

 No lack of shortage in hardware support. It is very difficult to think of any hardware that is not supported in some way by Windows.

Software Support

 Once again, there is an abundance of high-quality software designed specifically for Windows.

You don’t have to work hard to find what you are looking for. Windows Update

 If connected to an internet through an ISP, updates and patches are available to

download while you work. Just click ‘yes’, and Windows updates itself with latest

from Microsoft.

Widely Used Among Consumers

 Facilitates communication between users.

 If everyone is using the same operating system, everyone has a general idea as to what the other individual is trying to communicate.

 Mobility is not an issue.

 Can take a file from one computer to another, and generally won’t have to worry if that

second computer is running Windows or not.

Microsoft Windows - Cons

Software

 While there may be an abundance of high-powered software designed for Windows, they are rather expensive.

 One must install separate software onto Windows for it to have any functionality. Windows without

accompanying software is just a “Naked System”

Re-booting

 Part of the reason for the long installation

 Windows needs to be rebooted to change minor settings like its IP address, hardware drivers, software, or swapfile size or any number of similar system settings

File System

 Operating Systems running under different file systems may or may not be able to view and access files in a certain file system.

 FAT16, FAT32, NTFS

Graphical User Interface (GUI)

 GUI-only environment hinders the functionality of the operating system code.

 If some sort of functionality hasn't been coded explicitly by the author of a program, then this functionality is simply not available.

 If you can’t click it, you can’t do it.

Viruses

 Vast majority of known viruses are for Windows ONLY

 Grave security holes in Microsoft Outlook and Explorer

Length of Installation

 Can take up to a couple hours to fully install just the Operating System

What is Linux?

Linux is a kernel-based operating system

 Meaning that the operating system runs within itself. The program does not need to ‘piggy-back’ from another program to run.

Originally created by Linus Torvalds of Finland in 1991 with the assistance of developers around the world.

Developed under the GNU General Public License, the source code for Linux is freely available to everyone.

 Since the source code is available to anyone, there is no current official Linux version as with Windows. There are simply many different versions, called Linux Distributions, that are aimed towards different target groups.

 Each distribution differentiates itself from one another through their packaged software and their hardware platform.

Linux – Pros

Ease of Installation Security

 Local Security

 Many users can use the same PC, one of which controls everything with administrative powers

 Remote Security

 Very difficult to hack into a Linux system from an outside source (Internet, Network)

File Systems

 Can handle a variety of different file systems

 Perfectly handles reading and writing of Windows FAT32 partitions and it can read NTFS partitions (Windows XP default)

 Can access, but not modify any files located on any Windows partition

Multi-User Platform Customization

 Very important for businesses. Since Linux is an open source program. Anyone can make changes to the operating system to make it match their needs.

Server/Clients

 Linux is perfectly integrated to the internet and includes everything needed.  Servers

FTP Server: Pureftp, Proftp Mail Server: Sendmail, Postfix Web Server: Apache  Clients

FTP Clients: gftp, lftp Chat Clients: Kopete, Licq, Psi E-mail Clients: Kmail, Evolution

Linux - Cons

Time-Intensive

 A user accustomed to Windows can at first be a bit disoriented since the whole structure of the system is different.

 Learning all the details about how a Linux system functions will take time and patience

 Noone should expect be able to harness the full power of Linux within the first few minutes of playing around with the operating system

Hardware Support

 Although it runs on a variety of different hardware architectures, support for bleeding edge hardware can be problematic or its configuration tricky

Software/Games

 Very few major commercial games available for Linux

 Most software found in stores is designed for Windows only

 Additional software can be problematic to install due to the variety of distributions of Linux.

 One piece of software that is installed on one computer may or may not be compatible with another computer running a different distribution.

Network Operating Systems

What are examples of network operating systems? Next p. 8.25 NetWare NetWare Designed for Designed for client/server client/server networks networks Windows Windows Server 2003 Server 2003 Upgrade to Upgrade to Windows 2000 Windows 2000 Server Server Windows Windows Server 2008 Server 2008 Solaris Solaris

Version of UNIXVersion of UNIX developed by Sun developed by Sun Microsystems Microsystems

Specifically forSpecifically for e

e--commercecommerce applications applications

Embedded Operating Systems

What is anembedded operating system?

Next

p. 8.26 Fig. 8-32

 Found on most mobile computers, PDAs, and other small computers.

 Examples:

 Windows CE .NET  Windows Mobile 2006

 Palm OS (for PDAs & smart phones)

 Embedded Linux (small Linux OS for PDAs)  Symbian OS (open source multitasking OS)

Embedded Operating Systems

What is anembedded operating system?

Next

p. 8.26 Fig. 8-32

 Found on most mobile computers, PDAs, and other small devices  Windows CE .NETis scaled-down version of Windows  http://msdn.microsoft.com/embed ded/prevver/ce.net/default.aspx

Embedded Operating Systems

What are two operating systems for PDAs?

Next

p. 8.27 Figs. 8-33–8-34

 Windows Mobile 2006for the Pocket PC

http://www.microsoft.com/windowsmobile/default.mspx

 Palm OSfor Palm Treo, Visor, and Sony CLie  http://www.palm.com/us/

Embedded Operating Systems

What is Symbian OS? http://www.symbian.com/

Next

p. 8.27 Fig. 8-35

 Open-source, multitasking operating system designed for smart phones

 Make telephone calls, save appointments, browse Web, send and receive e-mail and faxes, and more

Utility Programs (Antivirus Utilities)

 Potentially damaging computer program

 Affects computer without user’s knowledge

Utility Programs (Antivirus)

What is anantivirus program? (Symantec, McAfee)

Next

p. 8.28 Fig. 8-37

 Identifies and removes viruses in memory, storage media, and incoming files

Utility Programs

What is a personal firewall?

Next

p. 8.29 Fig. 8-38

 Protects personal computer from unauthorized intrusions  Monitors all transmissions to and from computer

Personal Firewalls

What is a personal firewall?

p. 11.09 Fig. 11-8 Next

 Program that protects personal computer and its data from unauthorized intrusions

 Monitors transmissions to and from computer

 Informs you of attempted intrusion

Firewalls: Zone Alarm & Windows XP

 http://www.zonelabs.com/store/content/company/pr oducts/znalm/freeDownload.jsp

 Windows XP comes with a built-in firewall, but it is turned on by default.

To find out how to turn it on, visit:

www.microsoft.com/security/protect

 The Windows XP firewall software works only

“one way” which means it blocks only suspicious

activity aimed at your computer and not coming from your computer.

Utility Programs

What is spyware?

Next

p. 426

 Program placed on a computer without the user’s

knowledge that secretly collects information about the user

 Often enters a computer as a result of a user installing a new program

 Aspyware removeris a program that detects and deletes spyware. Adware can also be a problem:

Pop-up Blockers

Utility Programs

What are internet filters?

Next

p. 426 - 427

 Programs that remove or block certain items from being displayed (Anti-Spam, Web Filters, Pop-up Blockers)  http://www.stopzilla.com/download/download_select.aspx?AID=1 0004&S=&type=DOWNLOAD&topic=&source=&AAID=&dre=&c id=pop%20up%20software Anti-Spam Programs Web Filters

Keeping Windows Updated

Visit:

http://update.microsoft.com/windowsupdate/v6/default .aspx?ln=en-us

Utility Programs

What is CD/DVD burning software?

Next

p. 428 Fig. 8-38

 Writes text, graphics, audio, and video files to a recordable or rewriteable CD or DVD

 http://www.roxio.com/enu/default.html?source=G2

Utility Programs: Nero Version 8

What is CD/DVD burning software?

Next

p. 428 Fig. 8-39

 Writes text, graphics, audio, and video files to a recordable or rewriteable CD or DVD

Ripping

Copying songs from CD to computer

Chapter 8 Operating Systems

End of Presentation