RHCSA 7RHCE Red Haf Linux Certification Practice

RHCSA

7RHCE

Red

Haf

Linux Certification

Practice

Exams with

Virtual Machines

(Exams

EX200

&

_EX300)

"IcGraw-Hill isanindependent entityfrom RedHat, Inc.,and isnotaffiliated with Red Hat, Inc. in

iny manner.Thispublicationand DVD may be usedin_assistingstudentsto_{prepare for}aRed Hat

Certified_EngineerExamor a RedHat CertifiedSystemAdministratorExam. Neither Red Hat,Inc. lorMcGraw-Hillwarrantthatuseof thispublicationwillensurepassingtherelevantexam.Red

Hat®,Red Hat®Linux®,RedHat®EnterpriseLinux®,RHCE®,RHCT and RHCSAareeither

egisteredtrademarksortrademarks of RedHat,Inc.inthe United States and/or othercountries.

Thispublicationisnotintendedtobeasubstitute for the Red Hat RHCSA prepcourse,RH200,

orthe RHCE prepcourse,RH300.Thisstudy/training guideand/or material isnot_{sponsored by,}

endorsed_by,oraffiliated with RedHat,Inc.in_anymanner.

Michael

_Jang

CONTENTS

About the

Contributors iv

Acknowledgments

xv

Preface

xvi

Introduction _xxiii

I

_Prepare

for Red

Hat Hands-on

Certifications

I

The RHCSA

and RHCE

Exams

4

The

Exam

_Experience

₄

The

RHCSA

Exam 5

The RHCE

Exam

5

Evolving

Requirements

6

Basic

Hardware

_Requirements

6

Hardware

_{Compatibility}

7

RAM

_Requirements

₈

Hard Drive

_Options

₈

Get

Red Hat

_Enterprise

Linux 8

The

Point Releases Don't

Matter

9

The Choices

9

Purchase an

RHEL

6

Subscription

₁₀

GetanEvaluation

Copy

10

Putting

RHEL 6 toWork 10

Third-Party

Rebuilds

11

Installation

_Requirements

12

Red

Hat

and

Virtual Machines

13

Virtual and

_Physical

_Systems

₁₄

Installation

_Options

₁₄

Boot

Media

15

Booting

the RHEL

6

Installation

15

Basic Installation

_Steps

₁₆

Default

_{Security Settings}

₂₅

Install

Virtual Machines from the DVD 28

A Preinstalled

Environment for Practice

Labs

32

Viii

RHCSA/RHCE Red Hat Linux Certification PracticeExams with Virtual Machines

Configure

a

Physical

Machine for Virtual Guests

34

A Default

_{Configuration}

FTP Server

35

A Default

_{Configuration}

HTTP Server

36

Q&A

Self

Test 38

Lab

_Questions

39

Self Test Answers 42

Lab

Answers

43

2

Virtual Machines and Automated Installations

47

Start

and

_Stop

Virtual Machines

48

Starting

and

_Stopping

VMs from the

Command Line 48

Starting

and

_Stopping

VMs from the GUI 49

Configure Systems

to Start Virtual MachinesatBoot

49

Accessa

Virtual

Machine's

Console

51

Access Remote

_{Systems Using}

SSH 51

Install Red Hat

_Enterprise

Linux

_Systems

asVirtual Guests 51

Install

Red Hat

_Enterprise

Linux

Automatically Using

Kickstart

52

Q&A

Self

Test 55

Lab

Questions

56

Self Test Answers 57

Lab Answers

58

3

Fundamental Command-Line Skills

61

AccessaShell

Prompt

and

Issue

Commands

with Correct

Syntax

... 62

Use

_Input/Output

Redirection

63

Create,

Delete, Copy,

and Move Files and Directories 63

Create Hard and Soft Links

64

Use grep and

Regular Expressions

to

Analyze

Text

64

Locate, Read, and

Use

_System

Documentation 65

Create and

Edit

Text

Files

66

Start,

Stop,

and

Check the Status of Network Services

67

Configure Networking

and Hostname

Resolution

67

Q&A

Self Test 70

Lab

_Questions

71

Self

Test Answers 72

Contents

_|x

4 RHCSA-Level

_{Security Options}

77

List, Set,

and

_Change

Standard

_ugo/rwx

Permissions 78

Diagnose

and Correct File Permission

Problems

79

Create

and

_Manage

Access

Control

Lists

(ACLs)

80

Configure

Firewall

_{Settings Using}

_{system-config-firewall}

or

iptables

. . 80

Set

_Enforcing

and Permissive Modes for SELinux 81

List and

_Identify

SELinux File and Process Context 82

Restore

Default

File Contexts 83

Use

Boolean

_Settings

to

Modify System

SELinux

Settings

84

Diagnose

and

Address Routine SELinux

_Policy

Violations 84

Q&A

Self Test

87

Lab

_Questions

88

Self

Test Answers 89

Lab Answers 90

5 The

Boot

Process 95

Boot, Reboot,

and Shut Downa

System Normally

96

Boot

_Systems

into

Different Runlevels

Manually

97

Use

_Single-User

Mode

to

Gain

Accessto a

System

98

Configure

Systems

to Boot Intoa

Specific

Runlevel

Automatically

.. 99

Configure

Network ServicestoStart

Automatically

atBoot 100

Modify

the

_System

Bootloader

101

Q&A

SelfTest

103

Lab

_Questions

104

Self

Test

Answers

105

Lab Answers 106

6

Linux

_Filesystem

Administration

109

Add New

Partitions,

Logical

Volumes,

and

_Swap

to a

System

Non-Destructively

Ill

List, Create,

Delete,

and Set Partition

_Type

for

_{Primary, Extended,}

and

Logical

Partitions Ill

X R.HCSA/RHCERed Hat Linux Certification PracticeExams with Virtual Machines

Mount

and Unmount CIFS

and NFS Network File

_Systems

115

Configure Systems

toMount File

Systems

atBoot

_{by Universally}

Unique

ID

(UUID)

orLabel 115

Create

and

_Configure

_{LUKS-encrypted}

Partitions

and

_Logical

Volumes

to

_Prompt

for

Password and

Mounta

Decrypted

File

System

atBoot 116

Mount, Unmount, and

Use

_{LUKS-encrypted}

File

_Systems

117

Configure Systems

to Mount

ext4,

LUKS-encrypted,

and

Network File

Systems Automatically

118

Q&A

Self Test 120

Lab

_Questions

122

Self Test

Answers 123

Lab Answers 125

7

_{Package Management}

129

Install and

_Update

Software

_Packages

from Red

Hat

_Network,

aRemote

Repository,

or

from the Local

File

System

130

Update

the

Kernel

_{Package Appropriately}

toEnsurea

Bootable

System

131

Q&A

Self

Test 133

Lab

_Questions

134

Self Test Answers 135

Lab

Answers

135

8

User Administration

137

Log

In

and Switch Users

inMultiuser Runlevels

138

Create, Delete,

and

_Modify

Local Users Accounts 139

Change

Passwords and

_Adjust

Password

_Aging

for Local User

Accounts 139

Create, Delete,

and

_Modify

Local

_Groups

and

Group Memberships

..

140

Create

and

_Configure

set-GID

Directories for Collaboration

141

Configure

a

System

to

Use

an

Existing

LDAP

Directory

Service

for

User and

_Group

Information

142

Q&A

Self Test

144

Lab

_Questions

145

Self Test Answers

146

Contents

_xi

9

RHCSA-Level

_System

_{Administration}

_Tasks

151

Access Remote

_{Systems Using}

VNC 152

Archive, Compress,

Unpack,

and

_Uncompress

Files

_Using

_{tar, star,}

gzip,

and

_bzip2

₁₅₂

Identify CPU/Memory

Intensive

_Processes;

_Adjust

Process

_Priority

with

renice, kill Processes

₁₅₃

Schedule Tasks

_Using

cron

₁₅₄

Locate

and

_Interpret

_{System Log}

Files

155

Q&A

SelfTest

₁₅₇

Lab

_Questions

₁₅₈

Self

Test

Answers

159

Lab Answers

160

10

A

_Security

Primer

₁₆₃

Use

_iptables

to

Implement

Packet

Filtering

and

Configure

Network

Address

Translation

_(NAT)

₁₆₄

Configure

Host-Based and

User-Based

_Security

for the

Service

165

Q&A

SelfTest

168

Lab

_Questions

₁₆₉

Self Test

Answers

₁₇₀

Lab Answers ₁₇₁

11

_System

Services and

SELinux

175

Install the

_Packages

Neededto

Provide the Service

₁₇₆

Configure

the Service

toStart When

the

_System

Is Booted 177

Configure

SELinux

to

_Support

the Service

₁₇₈

Configure

Key-Based

Authentication

₁₇₉

Configure

Additional

_Options

Described

inDocumentation 180

Q&A

SelfTest

₁₈₂

Lab

_Questions

₁₈₃

Self Test

Answers

₁₈₄

Xii

RHCSA/RHCERed Hat LinuxCertification Practice Examswith Virtual Machines

Use

_/proc/sys

and

_sysctl

to

Modify

and

Set Kernel Run-Time

Parameters

191

Builda

Simple

RPM that

Packages

a

Single

File 192

Configure System

as aniSCSI Initiator that

Persistently

Mounts

an

iSCSI

Target

194

Configure System

to

Authenticate

Using

Kerberos

195

Route IP traffic and Create Static Routes 196

Q&lA

Self

Test 198

Lab

Questions

199

Self Test Answers 200

Lab Answers 201

13

Electronic Mail Servers

205

Install the

_Packages

Neededto Provide

the

Service 206

Configure

SELinuxto

Support

the Service 207

Configure

the Service

to

Start When the

System

Is

Booted

207

Configure

the Service for

Basic

_Operation

208

Configure

Host-Based and User-Based

_Security

for the

Service

208

Configure

aMail Transfer

Agent (MTA)

to

Accept

Inbound E-mail

from other

_Systems

209

Configure

anMTAto

Forward

(Relay)

E-mail

Through

aSmart Host 210

Q&A

SelfTest 212

Lab

_Questions

213

Self Test Answers

214

Lab Answers 215

14

The

_Apache

Web Server

219

Install the

_Packages

Needed

toProvide

the

Service 220

Configure

SELinux to

_Support

the

Service 221

Configure

the

ServicetoStart

When the

_System

Is Booted 223

Configure

the

Service for Basic

_Operation

223

Configure

Host-Based

and

User-Based

_Security

for the Service

224

Configure

aVirtual Host 225

Configure

Private Directories

226

Deploy

aBasic CGI

Application

227

Contents

_xiH

Q&A

Self

Test 229

Lab

_Questions

₂₃₀

Self Test

Answers

231

Lab Answers 232

15

The

Samba

File Server

239

Install

the

_Packages

Neededto Provide the Service 240

Configure

SELinux to

Support

the

Service

240

Configure

the Serviceto

Start When the

System

Is Booted

242

Configure

the

Service for Basic

_Operation

₂₄₂

Configure

Host-Based and

User-Based

_Security

for the Service 243

Provide Network Sharesto

_Specific

Clients

244

Provide

Network Shares

Suitable for

_Group

Collaboration

245

Q&A

Self

Test

₂₄₇

Lab

_Questions

₂₄₈

Self Test

Answers

249

Lab Answers 250

16

More

_File-Sharing

Services

253

Install the

_Packages

NeededtoProvide the Service

₂₅₄

Configure

SELinux

to

Support

the

Service

254

Configure

the

Service

to

Start When the

System

Is Booted

255

Configure

the Service for Basic

_Operation

256

Configure

Host-Based and

User-Based

_Security

for

the Service

256

Configure

Anonymous-Only

Download foranFTP Server

257

Provide NFS Network Shares

to

_Specific

Clients

258

Provide NFS

Network

Shares

Suitable for

_Group

Collaboration 259

Q&A

Self Test 260

Lab

_Questions

261

Self

Test Answers

262

Lab

Answers

263

XiV

RHCSA/RHCE Red Hat LinuxCertification Practice Exams with Virtual Machines

Configure

a

System

to

_{Accept Logging}

fromaRemote

System

270

Install the

_Packages

Needed

to

Provide the

Service 271

Configure

SELinux

to

Support

the Service

271

Configure

the ServicetoStart When the

System

Is Booted 272

Configure

the Service for Basic

_Operation

272

Configure

Host-Based and User-Based

_Security

for

the Service

273

Configure

a

Caching-Only

Name Server

273

Configure

a

Caching-Only

Name ServertoForward DNS

_Queries

.. . 274

Synchronize

Time

_Using

Other NTP Peers 275

Q&A

Self Test

277

Lab

_Questions

278

Self Test Answers 279

Lab

Answers 280

A

_Prepare

a

System

for the

Sample

Exams

285

Basic

_Sample

Exam

System

Requirements

287

Additional

_Sample

Exam

_{System Requirements}

for the RHCE 289

B

RHCSA:

_Sample

Exam I

291

RHCSA

_Sample

Exam 1 Discussion 293

C

RHCSA:

_Sample

Exam 2

297

RHCSA

_Sample

Exam 2 Discussion 299

D

RHCE:

_Sample

Exam

I

303

RHCE

_Sample

Exam

1

Discussion

305

E

RHCE:

_Sample

Exam

2

309

RHCE

_Sample

Exam 2 Discussion 311

F

About the DVD

315

System Requirements

317

Technical

_Support

317