Appleâ€™s Terminal application is supremely powerful on your Mac, and while you should be wary when using it, you can benefit from some super-useful Mac tricks if you do.
What is Terminal?
The Terminal application can be understood as a text-based user interface with which to control your Mac using command line tools. These are very powerful, and they enable you to change lots of the ways your Mac usually behaves.
Terminal is unforgiving. You donâ€™t need to fear it, but you should be very, very careful to use precisely the right code when entering instructions for your Mac â€” particularly if using any command including the word “sudo”.
Source: Computer World – All Content