Essentials

You know IT. You've administered Windows, worked with Active Directory, written PowerShell, managed infrastructure. Linux uses different tools and different conventions — this track covers what you specifically need to know.

Five categories, built in order. Each one unlocks the next.

flowchart LR
    A["The\nCommand Line"] --> B["Users\n& Access"]
    B --> C["Text &\nPipelines"]
    C --> D["System"]
    D --> E["Bash\nScripting"]

    style A fill:#1a202c,stroke:#cbd5e0,stroke-width:2px,color:#fff
    style B fill:#2d3748,stroke:#cbd5e0,stroke-width:2px,color:#fff
    style C fill:#2d3748,stroke:#cbd5e0,stroke-width:2px,color:#fff
    style D fill:#2d3748,stroke:#cbd5e0,stroke-width:2px,color:#fff
    style E fill:#2f855a,stroke:#cbd5e0,stroke-width:2px,color:#fff

• The Command Line

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  Navigation, the filesystem layout, finding files, and getting help. The mental model every other Linux skill depends on.

• Users & Access

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  The Linux permissions model — chmod, chown, umask, SUID, SGID, and user and group management.

• Text & Pipelines

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  Stdin, stdout, stderr, pipes, redirection, and grep. The Unix toolkit for slicing and searching any text output.

• System

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  Process inspection, signals, job control, and resource monitoring — controlling what's running and why.

• Bash Scripting

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  Six articles from first script to reusable functions. The commands you've learned become automation tools.

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What's Next

After Essentials, the Efficiency track covers the tools that experienced Linux professionals reach for daily: systemd for service management, sed for text transformation, and package management. (Coming soon)