Knowing how to work with and display exit codes on the Linux command line or in scripts can help make errors more obvious.

Simple Linux Shell Scripts in Bash, Python, and Perl That Will Get You Up and Running by George Whittaker on July 16, 2024 ...

Each Linux command returns an exit code, with 0 indicating success and non-zero values indicating failure. You can use the $? variable to access the exit code and control program flow in scripts ...