$$ is an internal variable, it stores the process ID of the script itself or the current bash instance. Here is an example use case The output prompted.
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How to install Rust on Fedora Linux
Rust is a recent programming language focused on performance and memory safety, mainly safe concurrency.
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Deno v1.1.1 has been released
Deno v1.1.1 is out, it is a secure runtime for JavaScript and TypeScript.
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Stop Windows 10 from auto restarting
Windows is known for auto restarting after downloading and installing updates, it mostly restarts when you have something important running on your laptop.
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How to isolate objects in Blender 2.8
There are many advantages to work with isolated objects, isolating an object or part of a mesh, it lets you focus specifically on a certain area of the scene, this helps to analyze the scene better, it is also lighter for the viewport to compute while working on a big or heavy Blender scene file. […]