37 Guides

5 Topics

100% Free & Open Source

Interactive Learning

Every guide includes hands-on components to reinforce what you read.

Knowledge Checks Test understanding with quizzes after each section

Simulated Terminals Watch commands execute step-by-step with explanations

Hands-on Exercises Solve real scenarios with progressive hints

Code Walkthroughs Step through scripts line-by-line with annotations

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Shell Basics

How the shell works under the hood - startup files, PATH, variables, and expansions. Includes interactive quizzes, exercises, simulated terminals, and code walkthroughs.

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Topics

Linux Essentials 12 guides from shell basics to scripting best practices

DNS Administration 8 guides from fundamentals to architecture and operations

Git Fundamentals and concepts for getting through it

Databases InnoDB recovery with Percona Data Recovery Tool

Perl 15 guides from Unix foundations to web frameworks

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Roadmap See what's planned and track project progress