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RHCSA/RHCE® Red Hat® Linux® Certification Study Guide, Seventh Edition (Exams EX200 & EX300) Michael Jang Alessandro Orsaria This study/training guide and/or material is not sponsored by, endorsed by, or affiliated with Red Hat, Inc. in any manner. Red Hat®, Red Hat® Enterprise Linux®, RHCE™, RHCSA™, and the Red Hat logo and Red Hat “Shadowman” logo are trademarks or registered trademarks of Red Hat, Inc. in the United States and certain other countries. All other trademarks are trademarks of their respective owners. This publication and DVD-ROM may be used in assisting students to prepare for a Red Hat RHCSA or RHCE certification exam. Neither Red Hat nor McGraw-Hill warrants that use of this publication and DVD-ROM will ensure passing any exam. New York Chicago San Francisco Athens London Madrid Mexico City Milan New Delhi Singapore Sydney Toronto

Cataloging-in-Publication Data is on file with the Library of Congress McGraw-Hill Education books are available at special quantity discounts to use as premiums and sales promotions, or for use in corporate training programs. To contact a representative, please visit the Contact Us pages at www.mhprofessional.com. RHCSA/RHCE® Red Hat® Linux® Certification Study Guide, Seventh Edition (Exams EX200 & EX300) Copyright © 2016 by McGraw-Hill Education. All rights reserved. Printed in the United States of America. Except as permitted under the Copyright Act of 1976, no part of this publication may be reproduced or distributed in any form or by any means, or stored in a database or retrieval system, without the prior written permission of publisher, with the exception that the program listings may be entered, stored, and executed in a computer system, but they may not be reproduced for publication. All trademarks or copyrights mentioned herein are the possession of their respective owners and McGraw-Hill Education makes no claim of ownership by the mention of products that contain these marks. 1 2 3 4 5 6 7 8 9 0 DOC DOC 1 0 9 8 7 6 ISBN: Book p/n 978-0-07-184193-1 and DVD p/n 978-0-07-184195-5 of set 978-0-07-184196-2 MHID: Book p/n 0-07-184193-8 and DVD p/n 0-07-184195-4 of set 0-07-184196-2 Sponsoring Editor Timothy Green Editorial Supervisor Jody McKenzie Project Editor LeeAnn Pickrell Acquisitions Coordinator Amy Stonebraker Technical Editor Alex Davies Copy Editor Bart Reed Proofreader Lisa McCoy Indexer Rebecca Plunkett Production Supervisor James Kussow Composition Cenveo® Publisher Services Illustration Cenveo Publisher Services Art Director, Cover Jeff Weeks Cover Designer Jeff Weeks Information has been obtained by McGraw-Hill Education from sources believed to be reliable. However, because of the possibility of human or mechanical error by our sources, McGraw-Hill Education, or others, McGraw-Hill Education does not guarantee the accuracy, adequacy, or completeness of any information and is not responsible for any errors or omissions or the results obtained from the use of such information.

For the young widows and widowers: may they find the courage to face their fears, to navigate their way through the pain, and to find hope for a brighter future.

ABOUT THE AUTHORS Michael Jang (RHCE, LPIC-2, UCP, LCP, Linux+, MCP) is currently a Senior Technical Writer for ForgeRock. His experience with computers goes back to the days of jumbled punch cards. He has written other books on Linux certification, including LPIC-1 in Depth, Mike Meyers’ Linux+ Certification Passport, and Sair GNU/Linux Installation and Configuration Exam Cram. His other Linux books include Linux Annoyances for Geeks, Linux Patch Management, and Mastering Fedora Core Linux 5. He has also written or contributed to books on Microsoft operating systems, including MCSE Guide to Microsoft Windows 98 and Mastering Windows XP Professional, Second Edition. Alessandro Orsaria (RHCE, RHCA, CCIE x 2) is an IT professional with more than 15 years’ experience in the industry. He has authored articles for technical Linux magazines and is currently employed by a global equity hedge fund as an IT Infrastructure Architect. Alessandro is Red Hat RHCE and RHCA certified and has achieved two Cisco CCIE certifications in Routing & Switching and Datacenter. He holds an MBA from Imperial College of London and a degree in physics. About the Technical Editor Alex Davies works for a proprietary trading firm, where he is responsible for Linux systems and manages a team of Linux engineers across Chicago, New York, London, and Singapore. Alex is the author of MySQL Clustering and MySQL High Availability Cookbook. Earlier in his career he was both RHCE and RHCA certified and received the RHCE of the Year award in 2009 from Red Hat. Alex also holds a degree in economics from the University of Durham.

CONTENTS AT A GLANCE ................................. ............................... Prepare for Red Hat Hands-on Certifications Virtual Machines and Automated Installations Fundamental Command-Line Skills RHCSA-Level Security Options The Boot Process Linux Filesystem Administration Package Management User Administration RHCSA-Level System Administration Tasks 1 2 3 4 5 6 7 8 9 10 A Security Primer 11 System Services and SELinux 12 RHCE Administrative Tasks 13 Network Services: DNS, SMTP, iSCSI, and NTP 14 The Apache Web Server 15 The Samba File Server 16 NFS Secured with Kerberos 17 The MariaDB Server A B C 1 55 ............................................. 115 .................................................. 175 .................................................................... 241 ................................................. 285 .............................................................. 343 ................................................................ 395 .................................. 443 ................................................................... 479 ..................................................... 537 ...................................................... 579 ............................. 631 ........................................................... 679 .............................................................. 733 ....................................................... 773 ................................................................ 807 ........................................ 843 ........................................................... 847 ........................................................... 851 Prepare a System for the Sample Exams Sample Exam 1: RHCSA Sample Exam 2: RHCSA v

vi RHCSA/RHCE Red Hat Linux Certification Study Guide D E F Sample Exam 3: RHCE Sample Exam 1 Sample Exam 4: RHCE Sample Exam 2 About the DVD Glossary Index ......................................... 855 ......................................... 861 ...................................................................... 865 ............................................................................... 867 ................................................................................... 883

CONTENTS 1 Acknowledgments Preface Introduction ..................................................................... xxv ................................................................................... xxvii ............................................................................ xxxviii Hardware Compatibility Architectures RAM Requirements Hard Drive Options Networking Virtual Machine Options Prepare for Red Hat Hands-on Certifications ................. ................................................... The RHCSA and RHCE Exams The Exam Experience ................................................... ....................................................... The RHCSA Exam ......................................................... The RHCE Exam If You’re Studying “Just” for the RHCSA Exam ..................... .................................................. Evolving Requirements ................................................... Basic Hardware Requirements ................................................ .............................................................. ..................................................... ...................................................... ................................................................ ............................................... .................................................... ................................................ ................................................. .................................................... .................................................... ......................................................... .......................................... ............................ ........................................ ........................................... .................... .............................................................. ................................................................ ................................................................ ........................... .................................................. You Won’t Start from Scratch The Advantages of Network Installation Red Hat and Virtual Machines Virtual and Physical Systems A Pre-installed Environment for Practice Labs System Roles Installation Options Boot Media CD/DVD or Boot USB Starts Installation Basic Installation Steps Installation Requirements Get Red Hat Enterprise Linux Purchase a Subscription Get an Evaluation Copy Third-party Rebuilds Check the Download 1 4 5 5 6 6 6 7 7 8 8 9 9 10 11 11 12 12 13 13 14 14 15 15 15 16 18 18 19 20 vii

viii RHCSA/RHCE Red Hat Linux Certification Study Guide System Setup Options Configure Default File Sharing Services Initial Setup and Firstboot Default Security Settings Special Setup Options for Virtual Machines The Installation Perspective on Partitions Partition Creation Exercise Exercise 1-1: Partitioning During Installation Wow, Look at All That Software! Baseline Packages Package Groups During the Installation .......................... ............................................. ................... ...................................... ........................................................ .......................................................... .................................................. .............................................................. .............................................. ............................................... ........................ ........................................ .............................. .................... ..... .................................... .................................................. ........................................................ .................................................................... ............................................................ ......................................................... .............................................................. Mount and Copy the Installation DVD Set Up a Default Configuration Apache Server Exercise 1-2: Configure Apache as an Installation Server Share Copied Files via FTP Server Certification Summary Lab Questions Self Test Answers Lab Answers 25 28 30 32 34 34 35 36 37 37 38 39 40 40 42 43 45 46 48 49 52 53 ✓ Two-Minute Drill Q&A Self Test Configure KVM for Red Hat Why Virtual Machines If You Have to Install KVM The Right KVM Modules Configure the Virtual Machine Manager Configuration by Hypervisor Virtual Networks on a Hypervisor Exercise 2-1: Create a Second Virtual Network 2 Virtual Machines and Automated Installations .............. 55 56 57 58 59 60 61 62 63 68 68 73 75 76 80 81 81 83 ...................................................... .................................................. ............................................. ............................................... ............................ .......................................... .................................... ................. .......................................... ............................... ............................ ............................................... .............. ................................................. ....................................................... ...................................... ................................. Configure a Virtual Machine on KVM Exercise 2-2: Add Virtual Hard Drives KVM Configuration Files Control Virtual Machines from the Command Line Kickstart Concepts Set Up Local Access to Kickstart Set Up Network Access to Kickstart Configure a Virtual Machine on KVM Automated Installation Options

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RHCSA/RHCE Red Hat Linux Certification Study Guide, Seventh Edition.pdf

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