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Learn the Linux command line in a real terminal right in the page: navigating and managing files, viewing and searching text, pipes and redirection, the classic text tools, permissions and sudo, processes and services, your shell environment, and bash scripting. Every example runs in a safe, pretend Linux machine you can't break, with diagrams and a quick knowledge check every day.

  • 14 days
  • ~30 min / day
  • Beginner
  • Free account required
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Start Day 1

The big picture

Everything you'll cover, and how it fits together.

Mind map · click a dot to fold, drag to pan

Day by day

Go at your own pace. Your progress is remembered on this device.

  1. 1
    Day 1Up next 30 min

    Meet the Terminal

    What Linux and the shell are, your first commands, and getting help.

    ShellCommandsman
  2. 2
    Day 2 30 min

    Finding Your Way Around

    The file system tree, paths, and moving around with cd and ls.

    Pathscdls
  3. 3
    Day 3 30 min

    Files & Folders

    Create, copy, move and delete files and folders, and use wildcards.

    mkdircp & mvWildcards
  4. 4
    Day 4 30 min

    Reading & Writing Files

    View files with cat, head and tail, and write to them from the terminal.

    cathead & tailWriting files
  5. 5
    Day 5 30 min

    Searching

    Find files with find and search inside them with grep.

    findgrepRegex basics
  6. 6
    Day 6 30 min

    Pipes & Redirection

    Connect commands and send their output where you want it.

    PipesRedirectionstderr
  7. 7
    Day 7 30 min

    Text Power Tools

    sort, uniq, cut, tr, sed and awk for slicing and summarising text.

    sort & uniqcut & trsed & awk
  8. 8
    Day 8 30 min

    Permissions & sudo

    Read permissions, change them with chmod, and act as root safely.

    rwxchmodsudo
  9. 9
    Day 9 30 min

    Processes & Services

    See what's running, stop runaway programs, and manage services.

    ps & topkillsystemctl
  10. 10
    Day 10 30 min

    Your Shell Environment

    Variables, PATH, aliases and making the shell your own.

    VariablesPATHAliases
  11. 11
    Day 11 30 min

    Shell Scripts

    Write scripts with arguments, conditions and exit codes.

    ShebangArgumentsif
  12. 12
    Day 12 30 min

    Loops & Functions

    Repeat work with loops and organise scripts with functions.

    for & whileFunctionsReading files
  13. 13
    Day 13 30 min

    Networking & Packages

    Talk to servers with curl and ping, install software, and connect with SSH.

    curlaptssh
  14. 14
    Day 14 30 min

    Project: A Log Report

    Build a script that turns server logs into a daily report.

    PlanningScriptingReporting