Bash Scripting Deep Dive

Summary

Going beyond Phase 2's basics — functions, arrays, argument parsing, and proper error handling — turning ad-hoc one-liners into reliable, reusable automation scripts.

• 1Refactor a simple script from Phase 2 to accept command-line arguments properly.
• 2Practice writing a Bash function and calling it from multiple places in a script.
• 3Learn to use `set -e` and `set -u` to make scripts fail loudly instead of silently.