This section describes some of the things that controlling input and output can do for you.
"Debian GNU/Linux: Guide to Installation and Usage"
John Goerzen and Ossama Othman
The standard input is one source of the process's data; the standard output is one place the process sends data; and the standard error is a place the process can send error messages.
"Debian GNU/Linux: Guide to Installation and Usage"
John Goerzen and Ossama Othman
When you run a program from the shell, usually standard input comes from your keyboard, and standard output and error both go to your screen.
"Debian GNU/Linux: Guide to Installation and Usage"
John Goerzen and Ossama Othman