Macintosh Terminal Pocket Guide

Screen Output

echo	Print simple text on standard output.
printf	Print formatted text on standard output.
pbcopy	Copy standard input to the clipboard.
pbpaste	Copy the clipboard to standard output.
yes	Print repeated text on standard output.
clear	Clear the screen or window.

Terminal provides several commands for printing messages on standard output, such as echo:

➜ echo hello world
hello world

Each command has different strengths and intended purposes. These commands are invaluable for learning about the shell, debugging problems, writing shell scripts (see Programming with Shell Scripts), or just talking to yourself.