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ComptIa

Linux+ Complete

Study Guide

ComptIa

Linux+ Complete

Study Guide

(Exams LX0-101 and LX0-102)

Roderick W. . Smith

acquisitions Editor: Jeff Kellum Development Editors: Kim Wimpsett and Pete Gaughan technical Editors: Emmett Dulaney and Evan Blomquist

Production Editor: Liz Britten

Copy Editor: tiffany taylor

Production Manager: tim tate

Vice President and Executive Group Publisher: richard Swadley

Vice President and Publisher: Neil Edde

assistant Project Manager: Jenny Swisher associate Producer: Kit Malone

Quality assurance: angie Denny

Book Designer: Judy Fung, Bill Gibson

Compositor: Craig Johnson, Happenstance type-O-rama

Proofreader: Publication Services, Inc.

Indexer: ted Laux

Project Coordinator, Cover: Lynsey Stanford

Cover Designer: ryan Sneed

Published simultaneously in Canada

ISBN: 978-0-470-88845-2

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Smith, roderick W.

ComptIa Linux+ study guide : exams LX0-101 and LX0-102 / roderick W. Smith.1st ed. p. cm.

ISBN-13: 978-0-470-88845-2 (pbk.)

ISBN-10: 0-470-88845-8 (pbk.)

ISBN 978-0-470-91307-9 (ebk)

ISBN 978-0-470-91305-5 (ebk)

ISBN 978-0-470-91306-2 (ebk)

1. Electronic data processing personnelCertification. 2. Operating systems (Computers)Examinations

Study guides. 3. Linux. I. title.

Qa76.3.S47652 2010

005.4"32dc22

2010016921

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Dear reader,

thank you for choosing CompTIA Linux+ Complete Study Guide (Exams LX0-101 and

LX0-102).

this book is part of a family of premium-quality Sybex books, all of which are written by outstanding authors who combine practical experience with a gift for teaching. Sybex was founded in 1976. More than thirty years later, we"re still committed to producing consistently exceptional books. With each of our titles we"re working hard to set a new stan- dard for the industry. From the paper we print on, to the authors we work with, our goal is to bring you the best books available. I hope you see all that reected in these pages. I"d be very interested to hear your comments and get your feedback on how we"re doing. Feel free to let me know what you think about this or any other Sybex book by sending me an email at

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From one writer to another: Lola, keep writing your stories! acknowledgments Although this book bears my name as author, many other people contributed to its creation. Without their help, this book wouldn"t exist, or at best would exist in a lesser form. Jeff Kellum was the Acquisitions Editor, and so helped get the book started. Pete Gaughan, the Development Editor, and Liz Britten, the Production Editor, oversaw the book as it progressed through all its stages. Emmett Dulaney was the Technical Editor, who checked the text for technical errors and omissionsbut any mistakes that remain are my own. Tiffany Taylor, the copy editor, helped keep the text grammatical and understandable. The proofreader, Publications Services, Inc., checked the text for typos. I"d also like to thank Neil Salkind and others at Studio B, who helped connect me with Wiley to write this book. about the author

Roderick W. . Smith

is a Linux consultant and author. He has written over a dozen books on Linux, FreeBSD, and computer networking, including the

LPIC-1 Study

Guide and Linux Administrator Street Smarts (both from Sybex). He can be reached at

RODSMITH RODSBOOKSCOM.

Contents at a Glance

Introduction

xxi

Assessment Test

xlvii

Part I The CompTIA Linux+ LX0-101 Exam 1

Chapter 1 Exploring Linux Command-Line tools 3

Chapter

2 Managing Software 45

Chapter

3 Configuring Hardware 105

Chapter

4 Managing Files 177

Chapter

5 Booting Linux and Editing Files 225

Part II The CompTIA Linux+ LX0-102 Exam 265

Chapter 6 Configuring the X Window System, Localization, and Printing 267

Chapter

7 administering the System 329

Chapter

8 Configuring Basic Networking 383

Chapter

9 Writing Scripts, Configuring E-Mail, and Using Databases 427

Chapter

10 Securing Your System 475

Appendix about the Companion CD 519

Glossary

523
Index 551

Introduction

xxi

Assessment Test

xlvii

Part I The CompTIA Linux+ LX0-101 Exam 1

Chapter 1 Exploring Linux Command-Line Tools 3

Understanding Command-Line Basics

Exploring Your Linux Shell Options

Using a Shell

Exploring Shell Configuration

Using Environment Variables

Getting Help

Using Streams, Redirection, and Pipes

Exploring Types of Streams

Redirecting Input and Output

Piping Data Between Programs

Generating Command Lines

Processing Text Using Filters

File-Combining Commands 18

File-Transforming Commands

File-Formatting Commands

File-Viewing Commands

File-Summarizing Commands

Using Regular Expressions

Understanding Regular Expressions

Using grep 32

Using sed 34

Summary

Exam Essentials

Review Questions

Answers to Review Questions

Chapter

2 Managing Software 45

Package Concepts

Using RPM

RPM Distributions and Conventions

The rpm Command Set 50

Extracting Data from RPMs

Using Yum

RPM and Yum Configuration Files

RPM Compared to Other Package Formats

60
xii Contents

Using Debian Packages

Debian Distributions and Conventions

The dpkg Command Set 62

Using apt-cache 65

Using apt-get 65

Using dselect, aptitude, and Synaptic 69

Reconfiguring Packages

Debian Packages Compared to Other Package Formats

Configuring Debian Package Tools

Converting Between Package Formats

Package Dependencies and Conflicts

Real and Imagined Package Dependency Problems

Workarounds to Package Dependency Problems

Startup Script Problems

Managing Shared Libraries

Library Principles

Locating Library Files

Library Management Commands

Managing Processes

Understanding the Kernel: The First Process

Examining Process Lists

Understanding Foreground and Background Processes

Managing Process Priorities

Killing Processes

Summary

Exam Essentials

Review Questions

Answers to Review Questions

101

Chapter

3 Configuring Hardware 105

Configuring the BIOS and Core

Hardware 106

Understanding the Role of the BIOS

107

IRQs 109

I/O Addresses

112

DMA Addresses

113

Boot Disks and Geometry Settings

113

Coldplug and Hotplug Devices

115

Configuring Expansion Cards

117

Configuring PCI Cards

117

Learning about Kernel Modules

119

Loading Kernel Modules

120

Removing Kernel Modules

122

Contents xiii

Configuring USB Devices

123

USB Basics

123
quotesdbs_dbs8.pdfusesText_14

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