Exiting a Shell Script Based on Process Exit Codes

In shell scripting, handling errors efficiently is crucial to ensure scripts behave as expected. One common scenario is wanting the script to stop execution when any command fails. Here’s a breakdown of several methods to manage exit codes and halt your script on errors.

Understanding $? and Exit Codes

Every command in a shell script returns an exit code, with 0 indicating success and any non-zero value indicating an error. You can access the exit code of the last executed command using $?.

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