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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

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

  • Users & Access

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

  • Text & Pipelines

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

  • System

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

  • Bash Scripting

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

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)