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CompTIA Linux+ Portable Command Guide: All the commands for the CompTIA XK0-004 exam in one compact, portable resource, 2nd edition

Published by Pearson IT Certification (September 26, 2019) © 2020

  • William Rothwell Lead instructor and courseware developer

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  • Summarizes all commands, keywords, command arguments, and associated prompts
  • Presents configuration examples to show exactly how these commands are used
  • The perfect take-anywhere single-source resource for both exam study and day-to-day Linux administration: no need for thick books or even Web access!
Changes in the new version of the Linux Portable Command Guide:
Focus only on the new CompTIA exam (there is a single exam now, not two) and will not cover the LPIC-1 objectives.  
Some topics have been removed from the original exams while new topics have been added, such as SELinux, AppArmor, Orchestration and Git.

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    Introduction xxx

Part I: Hardware and System Confi guration
CHAPTER 1 Explain Linux boot process concepts 1
    Boot Loaders 1
    Boot Options 3
    File Locations 6
    Boot Modules and Files 7
    Kernel Panic 9
CHAPTER 2 Given a scenario, install, confi gure, and monitor kernel
    modules 11
    Commands 11
    Files 15
CHAPTER 3 Given a scenario, confi gure and verify network connection parameters 17
    Diagnostic Tools 18
    Configuration Files 28
    Bonding 34
CHAPTER 4 Given a scenario, manage storage in a Linux environment 37
    Basic Partitions 38
    Filesystem Hierarchy 40
    Device Mapper 41
    Tools 44
    Location 54
    Filesystem Types 58
CHAPTER 5 Compare and contrast cloud and virtualization concepts and technologies 59
    Templates 60
    Bootstrapping 62
    Storage 63
    Network Considerations 65
    Types of Hypervisors 66
    Tools 67
CHAPTER 6 Given a scenario, confi gure localization options 69
    File Locations 70
    Commands 70
    Environment Variables 73
    Character Sets 75
    UTF-8 75

Part II: Systems Operation and Maintenance
CHAPTER 7 Given a scenario, conduct software installations, confi gurations, updates, and removals 77
    Package Types 78
    Installation Tools 78
    Build Tools 86
    Repositories 88
    Acquisition Commands 89
CHAPTER 8 Given a scenario, manage users and groups 93
    Creation 94
    Modification 94
    Deletion 96
    Queries 96
    Quotas 98
    Profiles 102
    Important Files and File Contents 106
CHAPTER 9 Given a scenario, create, modify, and redirect fi les 109
    Text Editors 110
    File Readers 114
    Output Redirection 117
    Text Processing 123
    File and Directory Operations 129
    Bonus: regex 141
CHAPTER 10 Given a scenario, manage services 143
    Systemd Management 144
    Systemd-analyze blame 148
    Unit Files 148
    SysVinit 152
CHAPTER 11 Summarize and explain server roles 157
    NTP 158
    SSH 158
    Web 159
    Certificate Authority 159
    Name Server 159
    DHCP 160
CHAPTER 12 Given a scenario, automate and schedule jobs 165
    cron 165
    at 165
    crontab 167
    fg 170
    bg 171
    & 171
    kill 171
    Ctrl-c 172
    Ctrl-z 172
    nohup 172
CHAPTER 13 Explain the use and operation of Linux devices 173
    Types of Devices 174
    Monitoring and Configuration Tools 176
    File Locations 182
    Hot Pluggable Devices 185
CHAPTER 14 Compare and Contrast Linux Graphical User Interfaces 187
    Servers 187
    GUI 188
    Remote Desktop 189
    Accessibility 192

Part III: Security
CHAPTER 15 Given a scenario, apply or acquire the appropriate user and/or group permissions and ownership 193
    File and Directory Permissions 194
    Context-Based Permissions 203
    Privilege Escalation 209
    User Types 211
CHAPTER 16 Given a scenario, confi gure and implement appropriate access and authentication methods 213
    PAM 214
    SSH 221
    TTYs 228
    PTYs 230
    PKI 230
    VPN as a Client 231
    SSL/TLS 232
    Transport Mode 232
    Tunnel Mode 232
    IPSec 232
    DTLS 233
CHAPTER 17 Summarize security best practices in a Linux environment 235
    Boot Security 236
    Additional Authentication Methods 237
    Multifactor Authentication 237
    Importance of Disabling Root Login via SSH 239
    Password-Less Login 239
    Chroot Jail Services 240
    No Shared IDs 240
    Importance of Denying Hosts 240
    Separation of OS Data from Application Data 241
    Change Default Ports 241
    Importance of Disabling or Uninstalling Unused and Unsecure Services 242
    Importance of Enabling SSL/TLS 243
    Importance of Enabling auditd 243
    CVE Monitoring 243
    Discouraging Use of USB Devices 243
    Disk Encryption 244
    Restrict cron Access 244
    Disable Ctrl-Alt-Del 244
    Add Banner 245
    MOTD 245
CHAPTER 18 Given a scenario, implement logging services 247
    Key File Locations 247
    Log Management 249
CHAPTER 19 Given a scenario, implement and confi gure Linux fi rewalls 257
    Access Control Lists 258
    Technologies 259
    IP Forwarding 263
    Dynamic Rule Sets 263
    Common Application 265
CHAPTER 20 Given a scenario, backup, restore, and compress fi les 267
    Archive and Restore Utilities 268
    Compression 269
    Backup Types 272
    Off-Site/Off-System Storage 274
    Integrity Checks 275

Part IV: Linux Troubleshooting and Diagnostics
CHAPTER 21 Given a scenario, analyze system properties and remediate accordingly 277
    Network Monitoring and Configuration 278
    Storage Monitoring and Configuration 287
    CPU Monitoring and Configuration 289
    Memory Monitoring and Configuration 292
    Lost Root Password 295
CHAPTER 22 Given a scenario, analyze system processes in order to optimize performance 297
    Process Management 297
    Process States 297
    Priorities 298
    Kill Signals 299
    Commands 300
    PIDs 305
CHAPTER 23 Given a scenario, analyze and troubleshoot user issues 307
    Permissions 307
    Access 309
    Authentication 309
    File Creation 310
    Insufficient Privileges for Authorization 312
    Environment and Shell Issues 312
CHAPTER 24 Given a scenario, analyze and troubleshoot application and hardware issues 313
    SELinux Context Violations 314
    Storage 314
    Firewall 317
    Permission 318
    Service Accounts 319
    Group Memberships 319
    Dependencies 319
    Troubleshooting Additional Hardware Issues 320

Part V: Automation and Scripting
CHAPTER 25 Given a scenario, deploy and execute basic BASH scripts 327
    Shell Environments and Shell Variables 328
    #!/ bin/bash 332
    Sourcing Scripts 332
    Directory and File Permissions 333
    Extensions 333
    Commenting 333
    File Globbing 334
    Shell Expansions 334
    Redirection and Piping 336
    Exit Codes 336
    Metacharacters 336
    Positional Parameters 337
    Looping Constructs 337
    Conditional Statements 338
    Escaping Characters 340
CHAPTER 26 Given a scenario, carry out version control using Git 343
    Arguments 343
    Files 349
CHAPTER 27 Summarize orchestration processes and concepts 351
    Agent 351
    Agentless 352
    Procedures 352
    Attributes 352
    Infrastructure Automation 352
    Infrastructure as Code 352
    Inventory 353
    Automated Configuration Management 353
    Build Automation 353

APPENDIX Create your own journal 355

9780135591840, TOC, 7/19/19

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