I’m pretty comfortable on the command line. I can move about, issue commands, edit my profile, pipe things around, all that. However — and I’m probably supposed to admit this with a little shame — I’ve never really learned how to write shell scripts. Usually I’d write a Python script, a small command line app, or hack something together with Automator. It did the same job, but not being able to write a bash script from scratch felt like kind of a blind spot.