Linux · Module 03

Bash Scripting

Automate shell work with scripts, expansion, conditions, loops, and functions.

Practice interactively →

What you will learn

• Create and run Bash scripts safely
• Use quoting, expansion, and indexed arrays
• Write conditions, loops, and case statements correctly
• Handle functions, arguments, and exit status

Lessons

1. Shells, your first script, and I/O

   Understand how Bash reads scripts and connects data streams.

2. Variables, expansion, and arrays

   Preserve data boundaries while Bash expands values.

3. String, numeric, and file conditions

   Choose the right test operator and understand Bash exit status.

4. Loops and case statements

   Iterate predictably and branch with shell patterns.

5. Functions, arguments, and special parameters

   Isolate reusable logic and pass data through arguments or stdout.