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Bash

Move from typing commands to writing scripts that survive Monday morning. Loops, exit codes, traps, defensive scripting.

Hands-on labsbeginner16 labs
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You can still start this course now. Earlier courses give you the mental model the labs here assume.

By the end you'll be able to
  • Write scripts that fail loudly instead of silently
  • Handle arguments, exit codes, and traps like a grown-up
  • Loop over real data without choking on whitespace
  • Debug a broken script in production without rewriting it

Modules

Work through the labs in order. Each module builds one operating habit.

  1. 01
    Make a script runnable
    A script is a text file with a shebang on line one and the execute bit set. Three small steps to turn typed commands into a program.
    15 min
    Start
  2. 02
    Read what every command returns
    Every command returns a number when it finishes. Zero means success, anything else means failure. This number is how scripts detect errors.
    15 min
    Start