Linux Basic — Clean & Readable Code
Clean & Readable Code
Bash scripts are code. They deserve the same care you give to Python, Go, or any other language. This chapter teaches you how to write scripts that are easy to read, maintain, and debug six months from now.
What You Will Learn
By the end of this chapter you will be able to:
- Apply consistent naming conventions for variables, functions, and files
- Write comments that clarify intent without cluttering
- Use a script header block with metadata and usage
- Organize functions logically and avoid monolithic scripts
- Achieve ShellCheck compliance and understand its warnings
Topics in This Chapter
| # | Topic | Description |
|---|---|---|
| 1 | Naming Conventions | vars, functions, files |
| 2 | Commenting Best Practices | when, what, and how to comment |
| 3 | Script Header Block | metadata, usage, dependencies |
| 4 | Function Organization | modular structure, single responsibility |
| 5 | ShellCheck Compliance | fixing common warnings |
| 6 | Practice Exercises | Hands-on tasks |
The Principle
Code is read far more often than it is written. Optimise for the reader — including future-you — not for the writer.
A well-named variable (user_count) beats a cryptic one (uc).
A 3-line comment explaining why a hack exists is worth 10× the maintenance cost.
A script with a clear header and organised functions is a joy to debug.
Next → Naming Conventions
