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lang-bash
getoptshandling is a basic tool that can be used to improve all your scripts once you know how it works, so it's worth putting in a bit of effort up front....many of my sh scripts start with that basic structure: 1. usage() function; 2. variable initialisation; 3. getopts; 4. other arg handling and validation 5. main code. Or swap the order of 1 & 2 - it's often better to put the configurable defaults up top for visibility.