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We write enough shell that I think it's worth setting out some of our preferences.
@pbrisbin I'm sure you have ideas of more to consider here. Are you familiar with any good resources similar to http://www.tldp.org/LDP/abs/html/index.html but more focused on POSIX shell? It would be nice to have something to share with people less familiar with shell scripting that doesn't presume
bash
since we prefer to not usebash
-isms unless necessary.