The first TuxArena PDF ebook “Introduction to Linux Command-Line for Beginners” is now available completely free as a Christmas gift! You can read it online here or download the PDF version.

The guide covers the following topics:

What Is Linux?
Basic Commands and Concepts
Moving Around
More Useful CLI Commands
The Power of the Shell
Creating and Editing Files
Linux Directory Structure
Environment Variables
Bash built-ins
Pipes and Redirecting Output
Getting Help
Helpful Links & Further Reading

This is the first release so more improvements and corrections will be added, as well as new chapters.

If you have suggestions or corrections to this guide, please feel free to use the comments below.