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 ...

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

Introduction The Linux command line is a powerful tool that gives you complete control over your system. But to unleash its full potential, you must understand the environment in which it operates.