Get more done at the Linux command line with GNU Parallel: 
Do you ever get the funny feeling that your computer isn’t quite as fast as it should be? I used to feel that way, and then I found GNU Parallel.
GNU Parallel is a shell utility for executing jobs in parallel. It can parse multiple inputs, thereby running your script or command against sets of data at the same time. You can use all your CPU at last!
If you’ve ever used xargs, you already know how to use Parallel. If you don’t, then this article teaches you, along with many other use cases.
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