>If the same program is behaving differently between two systems - it can -only- be the environment that’s different. As a developer, I've generally used confi

>If the same program is behaving differently between two systems - it can -only- be the environment that’s different. As a developer, I've generally used configuration files for changing the operation of my software and environment variables for information my code needs to know about WHERE the code is running. For example, the same code doing the exact same thing on 10 machines would have the same configuration file (or command line parameters in simpler cases) but the environment variables may change from machine to machine.