In Linux, stdin is the standard input stream. This accepts text as its input. Text output from the command to the shell is delivered via the stdout (standard out) stream. Error messages from the command are sent through the stderr (standard error) stream.

What is stdin stdout?

In computer programming, standard streams are interconnected input and output communication channels between a computer program and its environment when it begins execution. The three input/output (I/O) connections are called standard input (stdin), standard output (stdout) and standard error (stderr).

What is stdin terminal?

stdin: The standard input pipe is where a command receives input. By default, you enter input from the command-line interface. You can redirect the output from files or other commands to stdin. stdout: The standard output pipe is where command output is sent. By default, command output is sent to the command line.