Comment Prompt? (Score 1) 50
The prompt is that little $_, or #, or blinking square, etc. showing you where to type. See VT100 terminals. A shell is the commands and features available by default when using that shell on your terminal. Make sure that you let the shell know what type of terminal it is running on. The command line is that space next to prompt, where you can input shell commands, pass through to system commands, or actually act interactively on a more feature-full terminal like a VT320, for example, a menu that allows you to navigate using the arrow keys. The MacOS terminal app is just a simple window (holdover from Next based on Freebsd unix) running one of the local shells, imitating the old DEC IBM, or whatever physical terminal.
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