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www.it-ebooks.info CentOS Bible www.it-ebooks.info www.it-ebooks.info CentOS Bible Timothy Boronczyk Christopher Negus Wiley Publishing, Inc. www.it-ebooks.info CentOS Bible Published by Wiley Publishing, Inc. 10475 Crosspoint Boulevard Indianapolis, IN 46256 www.wiley.com Copyright © 2009 by Wiley Publishing, Inc., Indianapolis, Indiana Published simultaneously in Canada ISBN: 978-0-470-48165-3 Manufactured in the United States of America 10987654321 No part of this publication may be reproduced, stored in a retrieval system or transmitted in any form or by any means, electronic, mechanical, photocopying, recording, scanning or otherwise, except as permitted under Sections 107 or 108 of the 1976 United States Copyright Act, without either the prior written per- mission of the Publisher, or authorization through payment of the appropriate per-copy fee to the Copy- right Clearance Center, 222 Rosewood Drive, Danvers, MA 01923, (978) 750-8400, fax (978) 646-8600. 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Library of Congress Control Number: 2009926357 Trademarks: Wiley and the Wiley logo are trademarks or registered trademarks of John Wiley & Sons, Inc. and/or its affiliates, in the United States and other countries, and may not be used without written permission. All other trademarks are the property of their respective owners. Wiley Publishing, Inc. is not associated with any product or vendor mentioned in this book. Disclaimer: This eBook does not include ancillary media that was packaged with the printed version of the book. www.it-ebooks.info About the Authors Timothy Boronczyk is a native of Syracuse, NY, where he works as a software developer by day and a freelance developer, writer, and technical editor by night. He has been involved in web design since 1998, with Linux since 2001, and over the years has written several articles and tutorials. Timothy holds a degree in software application programming. In his spare time, he enjoys photography, hanging out with his friends, and sleeping with his feet hanging off the end of his bed. He’s easily distracted by shiny objects. Christopher Negus is the author of the best-selling Red Hat Linux Bible series,aswellas the author of Linux Toys, Linux Toolbox series, Linux Troubleshooting Bible, Linux Bible 2009 edition, and dozens of other UNIX and Linux books. Chris is a Red Hat Certified Engineer (RHCE, cert #805008815534875), instructor (RHCI), and examiner (RHCX). Since 2008, Chris has been employed by Red Hat, Inc. as an instructor, teaching RHCE-track courses. Earlier in his career, Chris worked for eight years on development teams for the UNIX operating system at AT&T, where UNIX was created and developed. About the Technical Editor Ralph Angenendt has been working as a system and network administrator since 1998. After being introduced to Linux in 1995, Ralph’s interest in non-UNIX-like operating systems has dropped dramatically, so his work environment mostly consists of Linux servers. Besides having a sweet tooth for domesticating wild mail servers, Ralph also has a strong interest in automated system administration. Because of that he set up cfengine at his current employer to ease the pain of administrating a growing site. Since 2006, Ralph has been a member of the CentOS development team, where he leads the documentation force and does some infrastructure management. He might be met at a few Open Source conventions in Europe, largely Germany and the Benelux countries. www.it-ebooks.info www.it-ebooks.info Credits Acquisitions Editor Jenny Watson Development Editor Tom Dinse Technical Editor Ralph Angenendt Production Editor Daniel Scribner Copy Editor Cate Caffrey Editorial Manager Mary Beth Wakefield Production Manager Tim Tate Vice President and Executive Group Publisher Richard Swadley Vice President and Executive Publisher Barry Pruett Associate Publisher Jim Minatel Project Coordinator, Cover Lynsey Stanford Proofreader Jen Larsen, Word One Indexer Ron Strauss Cover Image Joyce Haughey Cover Designer Michael E. Trent www.it-ebooks.info www.it-ebooks.info Introduction xxv Part I Getting Started Chapter 1: An Overview of CentOS 3 Chapter 2: Installing CentOS 15 Chapter 3: Getting Started with the Desktop 69 Chapter 4: Using Linux Commands 119 Part II Using CentOS Chapter 5: Accessing and Running Applications 165 Chapter 6: Publishing with CentOS 221 Chapter 7: Music, Video, and Images in Linux 249 Chapter 8: Using the Internet and the Web 297 Part III Adminstration Chapter 9: Understanding System Administration 345 Chapter 10: Setting up and Maintaining User Accounts 395 Chapter 11: Automating System Tasks 427 Chapter 12: Creating Backups and Restoring Data 467 Chapter 13: Security 505 Part IV Networking Chapter 14: Setting Up Network Connections and LANs 561 Chapter 15: Setting Up an Internet Connection 611 Chapter 16: Setting Up Printers and Printing 657 Chapter 17: Setting Up a File Server 679 Chapter 18: Setting Up a Mail Server 719 Chapter 19: Setting Up an FTP Server 751 Chapter 20: Setting Up a Web Server 763 Chapter 21: Setting Up an LDAP Address Book Server 815 Chapter 22: Setting Up a DHCP Boot Server 833 Chapter 23: Setting Up a MySQL Database Server 845 Chapter 24: Making Servers Public with DNS 879 Appendix A: About the Media 907 Index 911 ix www.it-ebooks.info [...]... disk xxix www.it-ebooks.info www.it-ebooks.info CentOS Bible www.it-ebooks.info www.it-ebooks.info Getting Started IN THIS PART Chapter 1 An Overview of CentOS Chapter 2 Installing CentOS Chapter 3 Getting Started with the Desktop Chapter 4 Using Linux Commands www.it-ebooks.info www.it-ebooks.info An Overview of CentOS T he goal of the CentOS project (www .centos. org) is to produce an enterprise-class... 14 Chapter 2: Installing CentOS 15 Using the CentOS Live CD 16 Quick Installation 17 Detailed Installation Instructions 18 Installing CentOS 5 .19 Choosing Computer Hardware 21 Preparing for Installation Using the Live CD .22 Beginning the Installation 25 Running CentOS Firstboot 32... available What You Need To follow along with this book, you can install the complete CentOS 5 software found on the accompanying DVD If you don’t have a DVD drive, you can use the CD that comes with this book to try out CentOS without installing it Of course, you can also follow along on an existing CentOS system To install CentOS with the media that comes with this book, you need a PC with the follow general... Introduction About the Companion Media The CentOS 5 DVD that accompanies this book provides the software you need for a complete working CentOS system With this software, you can install sets of software packages that result in an installation from a few hundred megabytes to up to well over 10 GB of software We also include a CentOS 5 Live CD That CD can be booted to run a live CentOS GNOME desktop system without... Getting Started Chapter 1: An Overview of CentOS 3 What You Get with CentOS 5 Stepping Stone to Red Hat Enterprise Linux .6 What Is Linux? 7 Linux’s Roots in UNIX 7 Common Linux Features 10 Primary Advantages of Linux 11 Going Forward with CentOS 12 Help from the CentOS Project 12 Training and... Linux distributions, CentOS leverages the work done by thousands of software developers around the world that release their software under free and Open Source (FOSS) licenses IN THIS CHAPTER Introducing CentOS 5 What is Linux? But unlike other Linux distributions, CentOS distinguishes itself not by how it is different, but by how it strives to be the same Linux’s roots in UNIX The CentOS Linux distribution... provide support for multiple users on your CentOS system In Chapter 11, you learn to create shell scripts and to use the cron facility to automate a variety of tasks on your CentOS system Techniques for backing up your system and restoring files from backup are described in Chapter 12 Chapter 13 describes issues related to securing your computing assets in CentOS Part IV: Networking Part IV consists... W ith the CentOS operating system and the instructions provided in this book, you can transform your computers into free, safe, and powerful enterprise-class systems Not only can you configure your server to share files, printers, web pages, or directory services to other computers, but you can also use CentOS on everyday workstations as well to benefit from its security and stability Because CentOS includes... Getting Started, Using CentOS, Administration, and Networking Part I: Getting Started Part I consist of Chapters 1 through 4 Chapters 1 and 2 contain brief descriptions of the Linux technology and tell you what you need to get the operating system installed Chapter 1 serves as an introduction to the Linux OS and to CentOS in particular Chapter 2 discusses what you need to install CentOS and how to make... GNOME and KDE desktop environments These GUIs provide graphical means of using CentOS Chapter 4 describes ways of exploring and understanding CentOS primarily from the Linux shell command interpreter You learn how to use the bash shell, the vi text editor, and the commands for moving around the Linux file system Part II: Using CentOS Part II consists of Chapters 5 through 8, which include information for . www.it-ebooks.info CentOS Bible www.it-ebooks.info www.it-ebooks.info CentOS Bible Timothy Boronczyk Christopher Negus Wiley Publishing, Inc. www.it-ebooks.info CentOS Bible Published. with CentOS 12 Help from the CentOS Project 12 Training and Certification 13 Documentation 13 Summary 14 Chapter 2: Installing CentOS . . . 15 Using the CentOS