Defensive Bash Scripting FAQs

Question 1

What makes a shell script idempotent?

Accepted Answer

An idempotent script is designed so that it can be executed multiple times without changing the result beyond the initial application, often by checking the current state of a resource (like a directory or config file) before attempting to modify it.

Question 2

Why is variable quoting emphasized in defensive scripting?

Accepted Answer

Quoting variables (e.g., "$VAR") is critical to prevent word splitting and globbing, which are common sources of bugs and security vulnerabilities when scripts process filenames or inputs containing spaces and special characters.

Question 3

How does this skill improve CI/CD pipelines?

Accepted Answer

It provides standardized patterns for idempotency and error trapping, ensuring that deployment scripts fail safely, provide clear logs, and clean up temporary resources when interrupted.

Question 4

What is Bash strict mode?

Accepted Answer

Bash strict mode is a configuration set (set -Eeuo pipefail) that causes scripts to exit immediately upon encountering errors, undefined variables, or failures within a pipeline, preventing silent failures and unpredictable behavior.

Defensive Bash Scripting

소개

주요 기능

사용 사례

Defensive Bash Scripting

소개

주요 기능

사용 사례