JSON – JavaScript Object Notation – is the lingua franca for shipping data between systems. Everything from software APIs to web services commonly support, and typically default to, outputting data in JSON format. Because of its ubiquity, you're bound to run into a need to manipulate a chunk of JSON in the course of managing your fleet. For example, you might run a shell script on your Macs that instructs them to read data from an external system via its API using curl. That external sys...