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CompTIA Linux+ Study Guide: Exam XK0-004 4th Edition by Christine Bresnahan, ISBN-13: 978-1119556039

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CompTIA Linux+ Study Guide: Exam XK0-004 4th Edition by Christine Bresnahan, ISBN-13: 978-1119556039

[PDF eBook eTextbook]

  • Publisher: ? Sybex; 4th edition (July 18, 2019)
  • Language: ? English
  • 928 pages
  • ISBN-10: ? 1119556031
  • ISBN-13: ? 978-1119556039

The bestselling study guide completely updated for the NEW CompTIA Linux+ Exam XK0-004.

This is your one-stop resource for complete coverage of Exam XK0-004, covering 100% of all exam objectives. You’ll prepare for the exam smarter and faster with Sybex thanks to superior content including, assessment tests that check exam readiness, objective map, real-world scenarios, hands-on exercises, key topic exam essentials, and challenging chapter review questions.

Linux is a UNIX-based operating system originally created by Linus Torvalds with the help of developers around the world. Developed under the GNU General Public License, the source code is free. Because of this Linux is viewed by many organizations and companies as an excellent, low-cost, secure alternative to expensive OSs, such as Microsoft Windows. The CompTIA Linux+ exam tests a candidate’s understanding and familiarity with the Linux Kernel. As the Linux server market share continues to grow, so too does demand for qualified and certified Linux administrators.

Building on the popular Sybex Study Guide approach, this book will provide 100% coverage of the NEW Linux+ Exam XK0-004 objectives. The book contains clear and concise information on all Linux administration topic, and includes practical examples and insights drawn from real-world experience.

  • Hardware and System Configuration
  • Systems Operation and Maintenance
  • Security
  • Linux Troubleshooting and Diagnostics
  • Automation and Scripting

Table of Contents:

Introduction xxix

Assessment Test xlii

Part I Gathering Your Tools 1

Chapter 1 Preparing Your Environment 3

Setting Up a Learning Space 4

Exploring Linux Distributions 8

Locating a Terminal 14

Summary 14

Chapter 2 Sifting Through Services 15

What is a Linux Server? 16

Serving the Basics 19

Serving Local Networks 24

Implementing Security 29

Improving Performance 32

Summary 33

Exam Essentials 34

Review Questions 35

Chapter 3 Managing Files, Directories, and Text 39

Handling Files and Directories 40

Linking Files and Directories 55

Reading Files 59

Finding Information 66

Summary 77

Exam Essentials 77

Review Questions 78

Chapter 4 Searching and Analyzing Text 83

Processing Text Files 84

Redirecting Input and Output 95

Editing Text Files 105

Summary 116

Exam Essentials 117

Review Questions 118

Part II Starting Up and Configuring Your System 123

Chapter 5 Explaining the Boot Process 125

The Linux Boot Process 126

The Firmware Startup 128

Linux Bootloaders 130

System Recovery 137

Summary 141

Exam Essentials 141

Review Questions 143

Chapter 6 Maintaining System Startup and Services 147

Looking at init 148

Managing systemd Systems 149

Managing SysV init Systems 167

Digging Deeper into systemd 176

Summary 179

Exam Essentials 179

Review Questions 181

Chapter 7 Configuring Network Connections 187

Configuring Network Features 188

Basic Network Troubleshooting 201

Advanced Network Troubleshooting 205

Summary 209

Exam Essentials 210

Review Questions 212

Chapter 8 Comparing GUIs 217

Focusing on the GUI 218

Serving Up the GUI 231

Using Remote Desktops 235

Forwarding 240

Summary 245

Exam Essentials 245

Review Questions 247

Chapter 9 Adjusting Localization Options 253

Understanding Localization 254

Setting Your Locale 256

Looking at Time 259

Summary 265

Exam Essentials 266

Review Questions 267

Part III Managing Your System 273

Chapter 10 Administering Users and Groups 275

Managing User Accounts 276

Managing Groups 294

Setting Up the Environment 297

Querying Users 300

Managing Disk Space Usage 304

Summary 308

Exam Essentials 308

Review Questions 310

Chapter 11 Handling Storage 315

Storage Basics 316

Partitioning Tools 318

Understanding Filesystems 323

Formatting Filesystems 326

Mounting Filesystems 329

Managing Filesystems 331

Storage Alternatives 333

Summary 338

Exam Essentials 338

Review Questions 340

Chapter 12 Protecting Files 343

Understanding Backup Types 344

Looking at Compression Methods 346

Comparing Archive and Restore Utilities 349

Securing Offsite/Off-System Backups 362

Checking Backup Integrity 366

Summary 368

Exam Essentials 368

Review Questions 370

Chapter 13 Governing Software 373

Working with Source Code 374

Packaging Applications 380

Summary 392

Exam Essentials 393

Review Questions 394

Chapter 14 Tending Kernel Modules 397

Exploring Kernel Modules 398

Installing Kernel Modules 402

Removing Kernel Modules 404

Summary 405

Exam Essentials 405

Review Questions 407

Part IV Securing Your System 409

Chapter 15 Applying Ownership and Permissions 411

Looking at File and Directory Permissions 412

Access Control Lists 420

Context-Based Permissions 422

Understanding Linux User Types 430

Restricting Users 431

Summary 435

Exam Essentials 436

Review Questions 437

Chapter 16 Looking at Access and Authentication Methods 439

Getting to Know PAM 440

Exploring PKI Concepts 452

Using SSH 455

Using VPN as a Client 468

Summary 469

Exam Essentials 469

Review Questions 471

Chapter 17 Implementing Logging Services 473

Understanding the Importance of Logging 474

Basic Logging Using rsyslog 477

Journaling with systemd-journald 480

Summary 483

Exam Essentials 484

Review Questions 485

Chapter 18 Overseeing Linux Firewalls 487

Providing Access Control 488

Looking at Firewall Technologies 490

Forwarding IP Packets 505

Dynamically Setting Rules 506

Summary 508

Exam Essentials 508

Review Questions 510

Chapter 19 Embracing Best Security Practices 513

User Security 514

System Security 518

Network Security 525

Summary 528

Exam Essentials 528

Review Questions 530

Part V Troubleshooting Your System 533

Chapter 20 Analyzing System Properties and Remediation 535

Troubleshooting the Network 536

Troubleshooting Storage Issues 549

Troubleshooting the CPU 554

Troubleshooting Memory 556

Surviving a Lost root Password 560

Summary 562

Exam Essentials 562

Review Questions 563

Chapter 21 Optimizing Performance 567

Looking at Processes 568

Monitoring Processes in Real Time 570

Managing Processes 573

Summary 577

Exam Essentials 577

Review Questions 579

Chapter 22 Investigating User Issues 581

Troubleshooting Access 582

Examining File Obstacles 588

Exploring Environment and Shell Issues 591

Summary 593

Exam Essentials 593

Review Questions 594

Chapter 23 Dealing with Linux Devices 597

Communicating with Linux Devices 598

Working with Devices 605

Using Hot Pluggable Devices 613

Summary 615

Exam Essentials 616

Review Questions 617

Chapter 24 Troubleshooting Application and Hardware Issues 619

Dealing with Storage Problems 620

Uncovering Application Permission Issues 626

Analyzing Application Dependencies 628

Looking at SELinux Context Violations 633

Exploring Firewall Blockages 633

Troubleshooting Additional Hardware Issues 635

Summary 643

Exam Essentials 643

Review Questions 645

Part VI Automating Your System 649

Chapter 25 Deploying Bash Scripts 651

The Basics of Shell Scripting 652

Advanced Shell Scripting 657

Writing Script Programs 663

Summary 673

Exam Essentials 674

Review Questions 675

Chapter 26 Automating Jobs 677

Running Scripts in Background Mode 678

Running Scripts Without a Console 680

Sending Signals 681

Job Control 683

Running Like Clockwork 687

Summary 692

Exam Essentials 693

Review Questions 694

Chapter 27 Controlling Versions with Git 697

Understanding Version Control 698

Setting Up Your Git Environment 700

Committing with Git 703

Merging Versions 710

Summary 713

Exam Essentials 713

Review Questions 715

Part VII Realizing Virtual and Cloud Environments 717

Chapter 28 Understanding Cloud and Virtualization Concepts 719

Considering Cloud Services 720

Understanding Virtualization 723

Exploring Containers 727

Exercise 729

Summary 730

Exam Essentials 731

Review Questions 732

Chapter 29 Inspecting Cloud and Virtualization Services 735

Focusing on VM Tools 736

Understanding Bootstrapping 740

Exploring Storage Issues 746

Considering Network Configurations 747

Summary 750

Exam Essentials 751

Review Questions 752

Chapter 30 Orchestrating the Environment 755

Understanding Orchestration Concepts 756

Provisioning the Data Center 760

Looking at Container Orchestration Engines 763

Summary 765

Exam Essentials 765

Review Questions 766

Appendix Answers to Review Questions 769

Chapter 2: Sifting Through Services 770

Chapter 3: Managing Files, Directories, and Text 773

Chapter 4: Searching and Analyzing Text 777

Chapter 5: Explaining the Boot Process 781

Chapter 6: Maintaining System Startup and Services 784

Chapter 7: Configuring Network Connections 788

Chapter 8: Comparing GUIs 791

Chapter 9: Adjusting Localization Options 795

Chapter 10: Administering Users and Groups 798

Chapter 11: Handling Storage 801

Chapter 12: Protecting Files 803

Chapter 13: Governing Software 804

Chapter 14: Tending Kernel Modules 806

Chapter 15: Applying Ownership and Permissions 808

Chapter 16: Looking at Access and Authentication Methods 810

Chapter 17: Implementing Logging Services 811

Chapter 18: Overseeing Linux Firewalls 813

Chapter 19: Embracing Best Security Practices 815

Chapter 20: Embracing Best Security Practices 817

Chapter 21: Optimizing Performance 818

Chapter 22: Investigating User Issues 820

Chapter 23: Dealing with Linux Devices 822

Chapter 24: Troubleshooting Application and Hardware Issues 824

Chapter 25: Deploying Bash Scripts 826

Chapter 26: Automating Jobs 827

Chapter 27: Controlling Versions with Git 829

Chapter 28: Understanding Cloud and Virtualization Concepts 831

Chapter 29: Inspecting Cloud and Virtualization Services 832

Chapter 30: Orchestrating the Environment 834

Index 837

CHRISTINE BRESNAHAN, LINUX+, started working with computers more than 30 years ago as a system administrator. She is an Adjunct Professor at Ivy Tech Community College, where she teaches Linux Essentials, CompTIA Linux+ certification, and Python classes.

RICHARD BLUM, LINUX+, is a 30-year IT industry veteran, as both systems and network administrator for UNIX, Linux, and Microsoft servers. Rich is widely published on Linux and open source software and is an online Linux instructor for universities nationwide.

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