February 2004
Beginner
200 pages
5h 40m
English
In many of our examples, we’ll print information to the screen with the echo command, which we’ll formally describe in Screen Output. echo is one of the simplest commands: it merely prints its arguments on standard output, once those arguments have been processed by the shell.
$ echo My dog has fleas
My dog has fleas
$ echo My name shell is $USER Shell variable USER
My name is smith