Here are all the Linux commands, files, and concepts you need to pass your CompTIA Linux+ exam, in one concise, condensed resource. CompTIA Linux+ Portable Command Guide, Second Edition, is filled with valuable, easy-to-access information–and it’s portable enough to use wherever your work takes you. This guide summarizes all Linux+ certification-level Linux commands, keywords, command arguments, and associated prompts, and provides tips and examples of how to apply them to real-world scenarios. Configuration examples throughout the book give you a better understanding of how these commands are used in real-world environments. Fully updated for today’s CompTIA XK0-004 exam, this quick reference resource will help you memorize commands and concepts as you work to earn your Linux+ certification and use it in the workplace. Linux+ commands for research and solutions Logical how-to topic groupings for a one-stop resource Great for review before your Linux+ certification exam Compact size makes it easy to carry with you, wherever you go “Create Your Own Journal” appendix with blank, lined pages lets you personalize the book for your needs “What Do You Want to Do?” chart inside front cover helps you to quickly reference specific tasks The book is organized into these parts: Part I: Hardware and System Configuration: boot process, kernel modules, network connections, storage, cloud, virtualization, localization Part II: Systems Operation and Maintenance: software installation/configuration, users/groups, services, server roles, jobs, Linux devices, GUIs  Part III: Security: user/group permissions and ownership, access/authentication, security best practices, logging, firewalls, backup/restore/compress Part IV: Linux Troubleshooting and Diagnostics: analyze/remediate system properties; optimize performance; troubleshoot user, application, and hardware issues Part V: Automation and Scripting: BASH scripting, Git version control, orchestration

Table of Contents:
    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