Its job is to keep track of the latest versions of these packages and distribute it in a more controlled fashion. That is the purpose of a “package manager”. And because they are open source and freely distributed, as counterintuitive as it might sound, we need to centralize it somehow. They either come pre installed or can be installed through something called a “package manager”. Some applications are called packages or libraries (libs). Unix and Linux are open source and developed by thousands of developers. Open source means that anyone can freely review the code, make changes or write new applications. And they all have two things in common, they are composed of several components packed together - open sourced and distributed. Without going into too much detail it is based on another, more primitive operating system called Unix. Your computer runs an operating system called macOS. We will start with a brief history lesson followed by further explanation of included parts. An explanation to the intricate relationships between your mac computer and required packages to run ruby in an optimal way.
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