Error Handling in Scripts

Summary

Scripts should fail loudly and informatively rather than silently continuing after something goes wrong — proper exit codes, error messages, and cleanup logic prevent automation from making a bad situation worse.

• 1Add explicit error handling to a script: check command exit codes and fail with a clear message.
• 2Learn what exit code conventions (0 for success, non-zero for failure) scripts should follow.
• 3Practice adding a cleanup step (e.g. removing temp files) that runs even if the script fails partway.