Streams

Linux is provided with input/output redirection capabilities to facilitate tasks. It gives you the ability to manipulate the I/O streams using the following three types of streams:

• Standard input (stdin): In this stream, the input is taken from the keyboard
• Standard output (stdout): This stream displays the result directly on the screen
• Standard error (stderr): This is another type of standard output stream, but it carries error information instead of showing the output on the screen