Linux Pocket Guide

Screen Output

echo	Print simple text on standard output
printf	Print formatted text on standard output
yes	Print repeated text on standard output
seq	Print a sequence of numbers on standard output
clear	Clear the screen or window

Linux provides several commands for printing messages on standard output, in case you like to talk to yourself:

$ echo hello world
hello world

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