Bash Exit Codes and Error Handling for Scripting

Every command you run in a terminal leaves a silent trail: an exit code that signals success or a specific failure. Understanding these codes is the difference between a fragile script that breaks silently and a production-ready automation tool. This text-based course guides you through the mechanics of exit statuses, teaching you how to read, interpret, and control them to make your scripts robust and predictable. You will transition from writing basic command sequences to crafting resilient scripts that handle errors gracefully and communicate clearly with the operating system. What you'll learn: - Understand the foundational mechanics of the exit status variable and standard return codes - Control script execution flow using conditional checks based on command success or failure - Implement modern error handling practices including the use of exit-on-error and pipefail options - Define custom exit codes in your functions to communicate specific failure states - Practice debugging techniques by reading and interpreting standard system error codes Starting with fundamental terminal concepts and the core definition of exit statuses, you will progress through logical operators, custom exit signals, and modern error-trapping workflows. Each concept is explained through clear written theory and practical, real-world terminal examples. This course is designed for beginners who have a basic familiarity with the command line and want to write more reliable automation scripts. No prior scripting experience is required. Start reading today to write safer, smarter, and more reliable Bash scripts.