RHCE: Red Hat Certified Engineer Study Guide - Directory UMM

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xxxviii Introduction How to Use This Book This book has quite a few chapters—31, to be precise. Most of the chapters are small and focused so that you can quickly find and review topics. Small chapters also help you pace your study so that you avoid burn out. A few chapters, such as the chapter on installing Red Hat Linux, are longer than most, but, generally, their length is attributable to screen shots that will help you to stay oriented to the procedures those chapters explain. So, you probably won’t find even the longer chapters overly tiring. Be sure to read the inside front cover page of this book which discusses what’s on the companion CD. Because the chapters are small, the book is organized into parts that group related chapters: Part I: Background Chapters 1–5 explain RHCE certification and review basic material on PC hardware, Unix, TCP/IP networking, and Linux. You’re probably familiar with much of this material already, so feel free to skim these chapters, using these chapters just to fill in gaps in your recollection and understanding. Part II: Installation Chapters 6–8 describe the procedure for installing Red Hat Linux, including pre-installation planning and advanced installation techniques. Part III: Configuration and Administration Chapters 9–20 describe and explain Red Hat Linux system administration, including such topics as user accounts, disk quotas, and RPM packages. Part IV: Network Services Administration Chapters 21–25 describe and explain the administration of network services. They include material on Apache, NFS, Squid, and a variety of other servers, plus material on network security and system logs. Part V: X Window System Administration Chapters 26–28 concern the X Window System, the Unix standard graphical user interface. Part VI: Network Administration Chapters 29 and 30 cover routers and firewalls. Part VII: The RHCE Exam (RH302) Chapter 31 describes the RHCE exam in detail and gives suggestions for performing well on the exam.
Introduction xxxix Appendix A Appendix A is a practice exam for you to take as you prepare for the RHCE exam. Merely reading—or worse yet, skimming—this book won’t suffice to prepare you for the RHCE exam. Instead, you should follow a methodical, organized process such as the following: 1. Take the assessment test to determine the areas in which you excel and those in which you should spend more time studying. Strive to learn from your mistakes as well as your successes. 2. Study a chapter. Studying, by the way, involves more than mere reading; it involves interacting with the text, asking yourself questions, and probing to discover the consequences of what you read. 3. Complete the exercises in the chapter. Bear in mind that the RHCE exam will require you to demonstrate skills, which are acquired only by practice, not by precept. The exercises are probably the closest experience to a real RHCE exam you’ll find anywhere. They’re worth doing, if you plan to pass the exam. 4. Answer the review questions at the end of the chapter. These questions closely resemble the experience of the written portion of the RHCE exam. 5. Review chapter topics related to any questions you missed. Be sure you know the right answer and why the other responses are wrong. 6. Work your way through the entire book in this fashion, one chapter at a time. 7. When you believe you’re ready, take the practice exam in Appendix A, then assess your performance. 8. Take the bonus exam included on the CD to further test your readiness for the real thing. If you do well, sign up for the RHCE exam or the RHCE preparation course, according to your preference. If you don’t do well, repeat steps 1–8 until you’re able to pass the practice exam with confidence. 9. Use the Flashcard questions on the CD that accompanies this book to stay sharp while awaiting the RHCE exam.
Page 1 and 2: RHCE: Red Hat Certified Engineer St
Page 3 and 4: Associate Publisher: Jordan Gold Co
Page 5 and 6: Acknowledgments This is my tenth bo
Page 7 and 8: Introduction Like many in the Linux
Page 9: How Do You Take the RHCE Exam? Intr
Page 13 and 14: xlii Assessment Test 5. Which of th
Page 15 and 16: xliv Assessment Test 14. What is th
Page 17 and 18: xlvi Assessment Test 22. Which of t
Page 19 and 20: xlviii Assessment Test 31. Which of
Page 21 and 22: l Assessment Test 41. Which of the
Page 23 and 24: lii Assessment Test 50. The command
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Page 27 and 28: lvi Assessment Test 37. A. The comp
Page 29 and 30: Background PART I
Page 31 and 32: Though the Red Hat Certified Engine
Page 33 and 34: 6 Chapter 1 � Red Hat Certificati
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Page 37 and 38: 10 Chapter 1 � Red Hat Certificat
Page 45 and 46: Chapter 2 Hardware Basics RHCE PREP
Page 47 and 48: Linux Support for Systems 21 The RH
Page 49 and 50: Linux Support for Systems 23 CPU Ar
Page 51 and 52: TABLE 2.1 Supported CPUs (continued
Page 53 and 54: TABLE 2.2 Standard IRQ Assignments
Page 55 and 56: Configuring Jumperless Cards Suppor
Page 57 and 58: Keyboards Mice Support for Characte
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IDE and EIDE Interfaces Support for
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Support for Block Devices 37 IDE di
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Key Terms Summary 39 Device Support
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Review Questions Review Questions 4
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Answers to Review Questions Answers
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The installation and troubleshootin
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48 Chapter 3 � Unix Basics cp fin
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50 Chapter 3 � Unix Basics man Th
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52 Chapter 3 � Unix Basics rmdir
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54 Chapter 3 � Unix Basics TABLE
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56 Chapter 3 � Unix Basics able t
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58 Chapter 3 � Unix Basics Follow
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60 Chapter 3 � Unix Basics Most p
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62 Chapter 3 � Unix Basics You ca
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64 Chapter 3 � Unix Basics Creati
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66 Chapter 3 � Unix Basics /dev/h
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68 Chapter 3 � Unix Basics TABLE
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70 Chapter 3 � Unix Basics Enviro
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72 Chapter 3 � Unix Basics tests
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74 Chapter 3 � Unix Basics do com
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76 Chapter 3 � Unix Basics Key Te
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78 Chapter 3 � Unix Basics 5. To
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Chapter 4 Networking Basics RHCE PR
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Network Classes TCP/IP Networking 8
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Supernetting TCP/IP Networking 85 S
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FIGURE 4.1 The TCP/IP protocol laye
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UDP TCP TCP/IP Model 89 The UDP ena
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TABLE 4.1 Important TCP/IP Services
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TABLE 4.1 Important TCP/IP Services
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TABLE 4.2 Important Linux Daemons (
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TABLE 4.3 Important Linux Daemons U
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TCP/IP Model 99 Now complete Exerci
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Summary Summary 101 Now, complete E
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IP address loopback address netmask
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5. Which statement applies to port
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Chapter 5 History of Linux RHCE PRE
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The GNU Project and the Free Softwa
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The Linux Kernel 111 Hello everybod
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� Linux Knowledge Base, linuxkb.c
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Summary Key Terms Summary 115 In th
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Review Questions 117 5. Which of th
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Installation PART II
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Determining Needs Planning is an im
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124 Chapter 6 � Installation Plan
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This chapter explains how to instal
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142 Chapter 7 � Installing Red Ha
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This chapter covers some odds and e
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Chapter 9 Configuring Install- Time
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FIGURE 9.1 The Configure Keyboard s
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FIGURE 9.3 The Configure Timezones
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Using linuxconf 209 The linuxconf s
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FIGURE 9.6 The Init Default Runleve
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FIGURE 9.7 The Changing Password sc
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Using linuxconf 215 You can add a n
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FIGURE 9.12 The Boot Mode Configura
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FIGURE 9.14 The Adapter 1 screen Us
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Summary 221 restarted. When you ins
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User Accounts One of the primary ta
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230 Chapter 10 � Administering Us
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Quota Concepts The administrator of
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268 Chapter 11 � Implementing Use
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Chapter 12 Using RPM Packages RHCE
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FIGURE 12.1 The RPM facility Packag
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Adding Packages Adding Packages 287
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Adding Packages 289 If a package re
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Performing Updates and Fixes 291 Wh
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Determining File Ownership 293 To v
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Querying and Verifying Package Cont
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TABLE 12.1 Package Verification Fla
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Querying and Verifying Package Cont
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TABLE 12.2 Source File Flags of the
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Summary Summary 303 You should now
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A typical Red Hat Linux system hold
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312 Chapter 13 � Understanding th
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Chapter 14 System Initialization RH
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The /etc/rc.d/rc.sysinit Script 331
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The /etc/rc.d/rc Script 333 During
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TABLE 14.2 Description of Common Ru
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The /etc/rc.d/rc Script 337 Now tha
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TABLE 14.3 Summary of Common Runlev
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The /etc/rc.d/rc Script 341 When a
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Adding a Service Associating Servic
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The /etc/rc.d/rc.local Script 345 s
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Key Terms Summary 347 Symbolic Link
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5. Which of the following tools can
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Chapter 15 Understanding Configurat
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The ifcfg-* Scripts The /etc/syscon
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The /etc/sysconfig Network Files an
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Adding and Dropping Network Interfa
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TABLE 15.4 Files and Directories in
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3. Issue the command Sound Configur
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TABLE 15.5 Linux File System Types
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TABLE 15.6 Mount Options (continued
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The /etc/inittab File The init Proc
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Summary ud::once:/sbin/update ca::c
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The cron System The cron system let
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382 Chapter 16 � Using the cron S
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Chapter 17 Understanding the Kernel
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Kernel Versions � Kernel-related
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Kernel Types Kernel Basics 403 Orig
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Kernel Basics 405 To build a custom
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The Kernel Source Tree Kernel Basic
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Module Location Kernel Modules 409
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Kernel Modules 411 where module is
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EXERCISE 17.7 (continued) 1. Make s
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path[net]=/lib/modules/default path
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Summary Summary 417 Now, complete E
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At one time, building a custom kern
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426 Chapter 18 � Configuring, Bui
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Next to the kernel and modules, the
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452 Chapter 19 � Managing Shared
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Chapter 20 Working in Single-User a
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Single-User Mode Single-User Mode 4
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Rescue Mode Rescue Mode 467 Now pra
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Rescue Mode 469 The boot disk conta
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Rescue Mode 471 In the example, par
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Rescue Mode 473 Inode table at 1638
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� /etc/lilo.conf � /etc/rc.d/*
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Key Terms Summary 477 Important Fil
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Review Questions 479 5. To check th
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V Network Services Administration P
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TCP/IP Services This chapter is one
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The inetd Service In general, a hos
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542 Chapter 22 � Restricting Acce
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Chapter 24 Administering Logs RHCE
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The klogd Process System Log Files
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� message is the message contents
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TABLE 24.1 Facilities and Their Des
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# The authpriv file has restricted
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Boot Log 599 CPU: AMD AMD-K7(tm) Pr
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Log Rotation 601 The logrotate comm
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Summary Summary 603 In this chapter
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A stand-alone computer that is kept
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Chapter 26 Installing and Configuri
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Installing X Installing X 627 X als
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TABLE 26.1 X Servers (continued) X
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XFree86-75dpi-fonts-*.rpm XFree86-x
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Configuring X 633 The following ste
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Configuring X 635 device. When you
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Configuring X 637 Select an appropr
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FIGURE 26.10 The Xconfigurator Cloc
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XF86Setup Configuring X 641 ask if
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� The Monitor button lets you con
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FIGURE 26.17 The XF86Setup Card scr
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FIGURE 26.19 The XF86Setup Monitor
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FIGURE 26.21 The XF86Setup Other sc
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SuperProbe Configuring X 651 The Su
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Summary Summary 653 Now complete Ex
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A suite of programs cooperates to p
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X Security One of the most useful f
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Chapter 29 Configuring a Linux Rout
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Static Routing 697 interface to one
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Static Routing 699 Another way to e
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Static Routing 701 where ip_address
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Kernel Configuration The Flags fiel
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TABLE 29.1 Kernel Networking Option
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TABLE 29.1 Kernel Networking Option
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Summary � Open Shortest Path Firs
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Additional Sources of Information S
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Review Questions 713 4. Which of th
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Chapter 30 Configuring a Firewall U
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FIGURE 30.1 A typical firewall Masq
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FIGURE 30.3 The kernel packet path
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Implementing a Firewall by Using ip
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TABLE 30.3 ipchains Rules (continue
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Saving and Restoring ipchains Rules
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Additional Sources of Information S
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Review Questions 729 5. To block pa
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The RHCE Exam (RH302) PART VII
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The RHCE Exam The RHCE exam is no c
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736 Chapter 31 � The RHCE Exam Im
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738 Chapter 31 � The RHCE Exam
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740 Chapter 31 � The RHCE Exam Th
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Appendix A Practice Exam
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6. Which of the following statement
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Practice Exam 747 15. Which of the
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42. Which of the following programs
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Answers to Practice Exam 757 11. A,
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Answers to Practice Exam 759 34. B.
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Shared Library File Ownership Table
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CP737 glibc CP775 glibc CSN_369103
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grpmodule python imap php-imap init
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libldap openldap Shared Library Fil
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libpbm libgr Shared Library File Ow
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mount_ext2 autofs mount_generic aut
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esource python rotormodule python r
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GNU General Public License
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GNU General Public License 819 Fina
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GNU General Public License 821 4. Y
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GNU General Public License 823 This
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GNU General Public License 825 If t
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2 Glossary A a.out The a.out format
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4 Glossary forwarding Forwarding is
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6 Glossary octet An octet is a seri
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8 Glossary three-button emulation T
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