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