CompTIA Linux+ Portable Command Guide

• Introduction xxxPart I: Hardware and System Confi gurationCHAPTER 1 Explain Linux boot process concepts 1Boot Loaders 1Boot Options 3File Locations 6Boot Modules and Files 7Kernel Panic 9CHAPTER 2 Given a scenario, install, confi gure, and monitor kernelmodules 11Commands 11Files 15CHAPTER 3 Given a scenario, confi gure and verify network connection parameters 17Diagnostic Tools 18Configuration Files 28Bonding 34CHAPTER 4 Given a scenario, manage storage in a Linux environment 37Basic Partitions 38Filesystem Hierarchy 40Device Mapper 41Tools 44Location 54Filesystem Types 58CHAPTER 5 Compare and contrast cloud and virtualization concepts and technologies 59Templates 60Bootstrapping 62Storage 63Network Considerations 65Types of Hypervisors 66Tools 67CHAPTER 6 Given a scenario, confi gure localization options 69File Locations 70Commands 70Environment Variables 73Character Sets 75UTF-8 75Part II: Systems Operation and MaintenanceCHAPTER 7 Given a scenario, conduct software installations, confi gurations, updates, and removals 77Package Types 78Installation Tools 78Build Tools 86Repositories 88Acquisition Commands 89CHAPTER 8 Given a scenario, manage users and groups 93Creation 94Modification 94Deletion 96Queries 96Quotas 98Profiles 102Important Files and File Contents 106CHAPTER 9 Given a scenario, create, modify, and redirect fi les 109Text Editors 110File Readers 114Output Redirection 117Text Processing 123File and Directory Operations 129Bonus: regex 141CHAPTER 10 Given a scenario, manage services 143Systemd Management 144Systemd-analyze blame 148Unit Files 148SysVinit 152CHAPTER 11 Summarize and explain server roles 157NTP 158SSH 158Web 159Certificate Authority 159Name Server 159DHCP 160CHAPTER 12 Given a scenario, automate and schedule jobs 165cron 165at 165crontab 167fg 170bg 171& 171kill 171Ctrl-c 172Ctrl-z 172nohup 172CHAPTER 13 Explain the use and operation of Linux devices 173Types of Devices 174Monitoring and Configuration Tools 176File Locations 182Hot Pluggable Devices 185CHAPTER 14 Compare and Contrast Linux Graphical User Interfaces 187Servers 187GUI 188Remote Desktop 189Accessibility 192Part III: SecurityCHAPTER 15 Given a scenario, apply or acquire the appropriate user and/or group permissions and ownership 193File and Directory Permissions 194Context-Based Permissions 203Privilege Escalation 209User Types 211CHAPTER 16 Given a scenario, confi gure and implement appropriate access and authentication methods 213PAM 214SSH 221TTYs 228PTYs 230PKI 230VPN as a Client 231SSL/TLS 232Transport Mode 232Tunnel Mode 232IPSec 232DTLS 233CHAPTER 17 Summarize security best practices in a Linux environment 235Boot Security 236Additional Authentication Methods 237Multifactor Authentication 237Importance of Disabling Root Login via SSH 239Password-Less Login 239Chroot Jail Services 240No Shared IDs 240Importance of Denying Hosts 240Separation of OS Data from Application Data 241Change Default Ports 241Importance of Disabling or Uninstalling Unused and Unsecure Services 242Importance of Enabling SSL/TLS 243Importance of Enabling auditd 243CVE Monitoring 243Discouraging Use of USB Devices 243Disk Encryption 244Restrict cron Access 244Disable Ctrl-Alt-Del 244Add Banner 245MOTD 245CHAPTER 18 Given a scenario, implement logging services 247Key File Locations 247Log Management 249CHAPTER 19 Given a scenario, implement and confi gure Linux fi rewalls 257Access Control Lists 258Technologies 259IP Forwarding 263Dynamic Rule Sets 263Common Application 265CHAPTER 20 Given a scenario, backup, restore, and compress fi les 267Archive and Restore Utilities 268Compression 269Backup Types 272Off-Site/Off-System Storage 274Integrity Checks 275Part IV: Linux Troubleshooting and DiagnosticsCHAPTER 21 Given a scenario, analyze system properties and remediate accordingly 277Network Monitoring and Configuration 278Storage Monitoring and Configuration 287CPU Monitoring and Configuration 289Memory Monitoring and Configuration 292Lost Root Password 295CHAPTER 22 Given a scenario, analyze system processes in order to optimize performance 297Process Management 297Process States 297Priorities 298Kill Signals 299Commands 300PIDs 305CHAPTER 23 Given a scenario, analyze and troubleshoot user issues 307Permissions 307Access 309Authentication 309File Creation 310Insufficient Privileges for Authorization 312Environment and Shell Issues 312CHAPTER 24 Given a scenario, analyze and troubleshoot application and hardware issues 313SELinux Context Violations 314Storage 314Firewall 317Permission 318Service Accounts 319Group Memberships 319Dependencies 319Troubleshooting Additional Hardware Issues 320Part V: Automation and ScriptingCHAPTER 25 Given a scenario, deploy and execute basic BASH scripts 327Shell Environments and Shell Variables 328#!/ bin/bash 332Sourcing Scripts 332Directory and File Permissions 333Extensions 333Commenting 333File Globbing 334Shell Expansions 334Redirection and Piping 336Exit Codes 336Metacharacters 336Positional Parameters 337Looping Constructs 337Conditional Statements 338Escaping Characters 340CHAPTER 26 Given a scenario, carry out version control using Git 343Arguments 343Files 349CHAPTER 27 Summarize orchestration processes and concepts 351Agent 351Agentless 352Procedures 352Attributes 352Infrastructure Automation 352Infrastructure as Code 352Inventory 353Automated Configuration Management 353Build Automation 353APPENDIX Create your own journal 3559780135591840, TOC, 7/19/19

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