And why does it matter?
All computer operating systems like Windows, Linux and Mac OS X all have a command prompt. In the world of windows and PCs you might be familiar with the command prompt as DOS and you might have been under the impression that is disappeared with windows since people didn’t need to use it anymore.
And it’s sort of correct - for a very casual user of a computer you can get by without needing to access the command prompt of the computer.
But the command prompt is there and it offers great advantages to anyone who is willing to put the effort into learning it. If you are building a website or a piece of software then it’s really important to understand how to access the command prompt in your computer and how to use it.