While you can manually enter the commands to edit files in Terminal editors, in OS X you can set up a service to open files in a desired terminal editor from the Finder's contextual menu.

GNU Screen allows you to run multiple console applications within a single terminal window, and switch between them easily with the keyboard—but it gets even better: it also allows you to save ...

How to Execute a File in a MacBook Terminal. The operating system your MacBook runs, OS X, is built on top of UNIX, and Terminal provides you with access to the underlying UNIX system commands.