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I actually had a google an old MS-DOS command.
There was a time I knew everything there was to know about DOS, almost any flavor.
But then we programmers realized CLI was a really stupid way to program spend our lives.
Now all the kewl kids are insisting we go back to the old Command Line Interface days.
I think I'll wait until the next generation of programmers tells the current batch of hipsters..
CLI is a sucky way to work with a computer