The focus is on interactive Bash, though many tips apply to other shells and to general Bash scripting. It includes both "standard" Unix commands as well as ones that require special package installs -- so long as they are important enough to merit inclusion.Notes...
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TL;DR: Require modules at the beginning of each file, before and outside of any functions. This simple best practice will not only help you easily and quickly tell the dependencies of a file right at the top but also avoids a couple of potential problems Otherwise: Requires are run synchro...