RHCE: Red Hat Certified Engineer Study Guide - Directory UMM

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� Perform diagnostics and troubleshooting RHCE Courses and Exam 7 Because Red Hat regularly updates its Linux distribution, RHCE certification is not valid indefinitely. However, according to Red Hat policy, RHCE certification remains valid for at least one year. Red Hat has announced that it plans to offer a more advanced level of certification, RHCE II, focusing on server administration, networking, integration, and security. RHCE II will not replace RHCE. Instead, Red Hat expects that many candidates will use RHCE certification as a stepping stone to RHCE II certification. At the time of writing, further details on RHCE II have not yet been announced by Red Hat. You should check Red Hat’s Web site, www.redhat.com, for the latest information on RHCE II. RHCE Courses and Exam As part of its RHCE program, Red Hat offers several courses designed to prepare candidates for the RHCE exam. Candidates must take course RH302, which is the exam itself. However, candidates can take none, some, or all of the other courses. This section describes the RHCE courses offered by Red Hat, as well as the RH302 exam. The following sections help you assess your readiness to sit for the RHCE exam and help you to map out a strategy for exam success. Red Hat offers courses at several locations throughout the U.S. and U.K. The current course schedule is available on their Web site, www.redhat.com, which also gives the current tuition for each course. RH033: Introduction to Red Hat Linux I, II RH033 is a four-day course intended for users who have no previous Unix or Linux experience. Students should, however, have previous experience with a computer, including use of a mouse and graphical user interface. Upon completion of the course, the student should be able to use and customize the GNOME desktop and be able to use the Linux command shell. At the time of writing, tuition for RH033 is $1,998.
8 Chapter 1 � Red Hat Certification RH133: Red Hat Linux System Admin I, II RH133 is a four-day course intended for users who are familiar with Red Hat Linux. Before taking this course, students should complete RH033 or possess equivalent experience. Upon completion of the course, students should be able to install and configure Red Hat Linux, X, and various network services and clients, such as DHCP, NIS, NFS, and Samba. Students should also be able to perform basic troubleshooting and rebuild the Linux kernel from source code. At the time of writing, tuition for RH133 is $2,098. RH253: Red Hat Linux Networking and Security Admin RH300: RHCE RH253 is a four-day course intended for Unix or Linux system administrators. Before taking this course, students should complete RH133 or possess equivalent experience. Upon completion of the course, students should be able to install and configure network services such as Apache, DHCP, DNS, FTP, Samba, NFS, sendmail, and IMAP4/POP3 mail. Students should also be able to establish and administer a security policy that includes such elements as password security, kernel security, public/private key encryption, Kerberos, secure shell, and firewalls. At the time of writing, tuition for RH253 is $2,198. RH300 is a five-day course that includes RH302, the RHCE exam, as an integral part of the course. Before taking this course, students should complete RH253 or possess equivalent experience and have experience as a Unix or Linux system or network administrator. The course consists of four days of instruction, and the fifth day is devoted to the RHCE exam. Upon completion of the course, students should be prepared to manage a Red Hat Linux system that offers common TCP/IP services, such as FTP and HTTP. The course includes eight units of instruction, each of which has one or more hands-on labs associated with the following topics: � Hardware and Installation (x86 Architecture) � Configuration and Administration � Alternate Installation Methods � Kernel Services and Configuration
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 and 10: How Do You Take the RHCE Exam? Intr
Page 11 and 12: Introduction xxxix Appendix A Appen
Page 13 and 14: xlii Assessment Test 5. Which of th
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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 29 and 30: Background PART I
Page 31 and 32: Though the Red Hat Certified Engine
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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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Page 61 and 62: IDE and EIDE Interfaces Support for
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Page 65 and 66: Key Terms Summary 39 Device Support
Page 67 and 68: Review Questions Review Questions 4
Page 69 and 70: Answers to Review Questions Answers
Page 71 and 72: The installation and troubleshootin
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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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Review Questions Review Questions 2
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Answers to Review Questions Answers
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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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486 Chapter 21 � Installing and C
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The inetd Service In general, a hos
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542 Chapter 22 � Restricting Acce
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In addition to the primary network
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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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612 Chapter 25 � Administering Se
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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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662 Chapter 27 � Understanding an
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X Security One of the most useful f
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680 Chapter 28 � Configuring and
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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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IBM851 glibc IBM852 glibc IBM855 gl
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LATIN-GREEK-1 glibc Leak mod_perl M
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grpmodule python imap php-imap init
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libldap openldap Shared Library Fil
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libnss1_files-2.1.2 glibc libnss1_n
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libpbm libgr Shared Library File Ow
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libresolv-2.1.2 glibc librle libgr
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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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