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CompTIA Linux+ Study Guide with Online Labs: Exam XK0-004

CompTIA Linux+ Study Guide with Online Labs: Exam XK0-004

          
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About the Book

Virtual, hands-on learning labs allow you to apply your technical skills using live hardware and software hosted in the cloud. So Sybex has bundled CompTIA Linux+ labs from Practice Labs, the IT Competency Hub, with our popular CompTIA Linux+ Study Guide, Fourth Edition. Working in these labs gives you the same experience you need to prepare for the CompTIA Linux+ Exam XK0-004 that you would face in a real-life setting. Used in addition to the book, the labs are a proven way to prepare for the certification and for work in the IT and cybersecurity fields where Linux is fundamental to modern systems and security. 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 viewed by many organizations and companies as an excellent, low-cost, secure alternative to expensive OSs, such as Microsoft Windows and is crucial to today's server and cloud infrastructure. The CompTIA Linux+ exam tests a candidate's understanding and familiarity with the Linux. 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 You'll also have access to an online test bank, including a bonus practice exam, electronic flashcards, and a searchable PDF of key terms. And with this edition you also get Practice Labs virtual labs that run from your browser. The registration code is included with the book and gives you 6 months unlimited access to Practice Labs CompTIA Linux+ Exam XK0-004 Labs with 65 unique lab modules to practice your skills.

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 Using That Old Laptop 4 Creating a Virtualized Environment 5 Jumping to the Cloud 7 Exploring Linux Distributions 8 Looking at CentOS 9 Looking at Ubuntu 10 Looking at openSUSE 12 Looking at Fedora 13 Locating a Terminal 14 Summary 14 Chapter 2 Sifting Through Services 15 What is a Linux Server? 16 Launching Services 17 Listening for Clients 18 Serving the Basics 19 Web Servers 20 Database Servers 21 Mail Servers 22 Serving Local Networks 24 File Servers 25 Print Servers 26 Network Resource Servers 26 Implementing Security 29 Authentication Server 29 Certificate Authority 30 Access Server (SSH) 31 Virtual Private Networks 31 Proxy Server 32 Monitoring 32 Improving Performance 32 Clustering 32 Load Balancing 33 Containers 33 Summary 33 Exam Essentials 34 Review Questions 35 Chapter 3 Managing Files, Directories, and Text 39 Handling Files and Directories 40 Viewing and Creating Files 40 Copying and Moving Files 45 Removing Files 52 Linking Files and Directories 55 Establishing a Hard Link 55 Constructing a Soft Link 57 Reading Files 59 Reading Entire Text Files 59 Reading Text File Portions 61 Reading Text File Pages 65 Finding Information 66 Exploring File Differences 67 Using Simple Pinpoint Commands 69 Using Intricate Pinpoint Commands 73 Summary 77 Exam Essentials 77 Review Questions 78 Chapter 4 Searching and Analyzing Text 83 Processing Text Files 84 Filtering Text 84 Formatting Text 89 Determining Word Count 93 Redirecting Input and Output 95 Handling Standard Output 95 Redirecting Standard Error 96 Regulating Standard Input 98 Piping Commands 100 Creating Here Documents 102 Creating Command Lines 103 Editing Text Files 105 Appreciating Text Editors 105 Learning About Stream Editors 110 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 Following the Boot Process 126 Viewing the Boot Process 127 The Firmware Startup 128 The BIOS Startup 128 The UEFI Startup 129 Linux Bootloaders 130 GRUB Legacy 131 GRUB2 134 Alternative Bootloaders 136 System Recovery 137 Kernel Failures 137 Root Drive Failure 139 Summary 141 Exam Essentials 141 Review Questions 143 Chapter 6 Maintaining System Startup and Services 147 Looking at init 148 Managing systemd Systems 149 Exploring Unit Files 150 Focusing on Service Unit Files 152 Focusing on Target Unit Files 157 Looking at systemctl 159 Examining Special systemd Commands 162 Managing SysV init Systems 167 Understanding Runlevels 168 Investigating SysV init Commands 171 Digging Deeper into systemd 176 Looking at systemd Mount Units 176 Exploring Automount Units 178 Summary 179 Exam Essentials 179 Review Questions 181 Chapter 7 Configuring Network Connections 187 Configuring Network Features 188 Network Configuration Files 188 Graphical Tools 191 Command-Line Tools 193 Basic Network Troubleshooting 201 Sending Test Packets 201 Finding Host Information 202 Advanced Network Troubleshooting 205 The netstat Command 205 Examining Sockets 208 Summary 209 Exam Essentials 210 Review Questions 212 Chapter 8 Comparing GUIs 217 Focusing on the GUI 218 Getting to Know GNOME 219 Probing KDE Plasma 221 Considering Cinnamon 223 Making Acquaintance with MATE 225 Understanding Unity 227 Setting Up Accessibility 228 Serving Up the GUI 231 Figuring Out Wayland 232 Examining X11 234 Using Remote Desktops 235 Viewing VNC 236 Grasping Xrdp 238 Exploring NX 239 Studying SPICE 240 Forwarding 240 Local 242 Remote 243 Tunneling Your X11 Connection 244 Summary 245 Exam Essentials 245 Review Questions 247 Chapter 9 Adjusting Localization Options 253 Understanding Localization 254 Character Sets 254 Environment Variables 255 Setting Your Locale 256 Installation Locale Decisions 256 Changing Your Locale 257 Looking at Time 259 Working with Time Zones 259 Setting the Time and Date 260 Watching System Time 264 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 Adding Accounts 276 Maintaining Passwords 288 Modifying Accounts 290 Deleting Accounts 292 Managing Groups 294 Setting Up the Environment 297 Perusing Bash Parameters 298 Understanding User Entries 299 Grasping Global Entries 300 Querying Users 300 Exploring the whoami Utility 300 Understanding the who Utility 301 Identifying with the id Program 302 Displaying Access History with the last Utility 303 Managing Disk Space Usage 304 Summary 308 Exam Essentials 308 Review Questions 310 Chapter 11 Handling Storage 315 Storage Basics 316 Drive Connections 316 Partitioning Drives 317 Automatic Drive Detection 317 Partitioning Tools 318 Working with fdisk 318 Working with gdisk 320 The GNU parted Command 322 Graphical Tools 322 Understanding Filesystems 323 The Virtual Directory 324 Maneuvering Around the Filesystem 326 Formatting Filesystems 326 Common Filesystem Types 326 Creating Filesystems 328 Mounting Filesystems 329 Manually Mounting Devices 329 Automatically Mounting Devices 330 Managing Filesystems 331 Retrieving Filesystem Stats 331 Filesystem Tools 332 Storage Alternatives 333 Multipath 333 Logical Volume Manager 334 Using RAID Technology 336 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 Copying with cpio 349 Archiving with tar 352 Duplicating with dd 357 Replicating with rsync 359 Securing Offsite/Off-System Backups 362 Copying Securely via scp 362 Transferring Securely via sftp 363 Checking Backup Integrity 366 Digesting an MD5 Algorithm 366 Securing Hash Algorithms 367 Summary 368 Exam Essentials 368 Review Questions 370 Chapter 13 Governing Software 373 Working with Source Code 374 Downloading Source Code 374 Bundling Source Code Packages 375 Compiling Source Code 379 Packaging Applications 380 Installing and Managing Packages 381 Understanding Repositories 385 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 Understanding Ownership 412 Controlling Access Permissions 414 Exploring Special Permissions 417 Managing Default Permissions 418 Access Control Lists 420 Context-Based Permissions 422 Using SELinux 423 Using AppArmor 427 Understanding Linux User Types 430 Types of User Accounts 430 Escalating Privileges 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 PAM Configuration Files 440 Enforcing Strong Passwords 444 Locking Out Accounts 447 Limiting Root Access 451 Exploring PKI Concepts 452 Getting Certificates 453 Discovering Key Concepts 453 Securing Data 454 Signing Transmissions 455 Using SSH 455 Exploring Basic SSH Concepts 456 Configuring SSH 458 Generating SSH Keys 460 Authenticating with SSH Keys 462 Authenticating with the Authentication Agent 464 Using SSH Securely 466 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 The syslog Protocol 474 The History of Linux Logging 476 Basic Logging Using rsyslog 477 Configuration 477 Making Log Entries 479 Finding Event Messages 479 Journaling with systemd-journald 480 Configuration 480 Viewing Logs 481 Summary 483 Exam Essentials 484 Review Questions 485 Chapter 18 Overseeing Linux Firewalls 487 Providing Access Control 488 Looking at Firewall Technologies 490 Familiarizing Yourself with firewalld 491 Investigating iptables 495 Understanding UFW 500 Forwarding IP Packets 505 Dynamically Setting Rules 506 DenyHosts 506 Fail2ban 506 IPset 507 Summary 508 Exam Essentials 508 Review Questions 510 Chapter 19 Embracing Best Security Practices 513 User Security 514 Authentication Methods 514 Multifactor Authentication 516 Unique User Accounts 517 Restricting the root Account 517 System Security 518 Separation of Data 518 Disk Encryption 519 Restricting Applications 520 Preventing Unauthorized Rebooting 520 Restricting Unapproved Jobs 522 Banners and Messages 523 Restricting USB Devices 523 Looking for Trouble 524 Auditing 524 Network Security 525 Denying Hosts 525 Disabling Unused Services 525 Changing Default Ports 526 Using Encryption on the Network 526 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 Exploring Network Issues 536 Viewing Network Performance 540 Reviewing the Network’s Configuration 546 Troubleshooting Storage Issues 549 Running Out of Filesystem Space 549 Waiting on Disk I/O 550 Failing Disks 553 Troubleshooting the CPU 554 Troubleshooting Memory 556 Swapping 556 Running Out of Memory 560 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 Setting Priorities 574 Stopping Processes 574 Summary 577 Exam Essentials 577 Review Questions 579 Chapter 22 Investigating User Issues 581 Troubleshooting Access 582 Local 582 Remote 586 Authentication 587 Examining File Obstacles 588 File Permissions 588 Directory Permissions 589 File Creation 590 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 Device Interfaces 598 The /dev Directory 600 The /proc Directory 601 The /sys Directory 604 Working with Devices 605 Finding Devices 605 Working with PCI Cards 608 Working with USB Devices 609 Supporting Monitors 610 Using Printers 611 Using Hot Pluggable Devices 613 Detecting Dynamic Devices 613 Working with Dynamic Devices 614 Summary 615 Exam Essentials 616 Review Questions 617 Chapter 24 Troubleshooting Application and Hardware Issues 619 Dealing with Storage Problems 620 Exploring Common Issues 620 Dealing with Specialized Issues 622 Uncovering Application Permission Issues 626 Analyzing Application Dependencies 628 Versioning 629 Updating Issues 629 Patching 630 Dealing with Libraries 630 Exploring Environment Variable Issues 631 Gaining GCC Compatibility 631 Perusing Repository Problems 632 Looking at SELinux Context Violations 633 Exploring Firewall Blockages 633 Unrestricting ACLs 633 Unblocking Ports 634 Unblocking Protocols 635 Troubleshooting Additional Hardware Issues 635 Looking at Helpful Hardware Commands 635 Investigating Other Hardware Problems 639 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 Running Multiple Commands 652 Redirecting Output 653 Piping Data 654 The Shell Script Format 655 Running the Shell Script 656 Advanced Shell Scripting 657 Displaying Messages 657 Using Variables 658 Command-Line Arguments 661 The Exit Status 662 Writing Script Programs 663 Command Substitution 663 Performing Math 664 Logic Statements 666 Loops 669 Summary 673 Exam Essentials 674 Review Questions 675 Chapter 26 Automating Jobs 677 Running Scripts in Background Mode 678 Running in the Background 678 Running Multiple Background Jobs 679 Running Scripts Without a Console 680 Sending Signals 681 Interrupting a Process 682 Pausing a Process 682 Job Control 683 Viewing Jobs 683 Restarting Stopped Jobs 686 Running Like Clockwork 687 Scheduling a Job Using the at Command 687 Scheduling Regular Scripts 690 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 What is Cloud Computing? 720 What Are the Cloud Services? 721 Understanding Virtualization 723 Hypervisors 723 Types of Hypervisors 725 Hypervisor Templates 726 Exploring Containers 727 What Are Containers? 727 Container Software 728 Container Templates 729 Exercise 729 Summary 730 Exam Essentials 731 Review Questions 732 Chapter 29 Inspecting Cloud and Virtualization Services 735 Focusing on VM Tools 736 Looking at libvirt 736 Viewing virsh 737 Managing with Virtual Machine Manager 738 Understanding Bootstrapping 740 Booting with Shell Scripts 740 Kick-Starting with Anaconda 741 Initializing with Cloud-init 744 Exploring Storage Issues 746 Considering Network Configurations 747 Virtualizing the Network 747 Configuring Virtualized NICs 748 Summary 750 Exam Essentials 751 Review Questions 752 Chapter 30 Orchestrating the Environment 755 Understanding Orchestration Concepts 756 Probing Procedures 757 Analyzing Attributes 758 Provisioning the Data Center 760 Coding the Infrastructure 761 Automating the Infrastructure 762 Comparing Agent and Agentless 762 Investigating the Inventory 763 Looking at Container Orchestration Engines 763 Embracing Kubernetes 763 Inspecting Docker Swarm 764 Surveying Mesos 764 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


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Product Details
  • ISBN-13: 9781119784241
  • Publisher: John Wiley & Sons Inc
  • Publisher Imprint: Sybex Inc.,U.S.
  • Height: 234 mm
  • No of Pages: 928
  • Spine Width: 46 mm
  • Weight: 1474 gr
  • ISBN-10: 1119784247
  • Publisher Date: 28 Dec 2020
  • Binding: Paperback
  • Language: English
  • Returnable: N
  • Sub Title: Exam XK0-004
  • Width: 185 mm


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