A pipe is a form of redirection (transfer of standard output to some other destination) that is used in Linux and other Unix-like operating systems to send the output of one command/program/process to another command/program/process for further processing.

What is pipe in command line?

Pipe shell command

The | command is called a pipe. It is used to pipe, or transfer, the standard output from the command on its left into the standard input of the command on its right.

What is pipe file in Linux?

In Linux, the pipe command lets you sends the output of one command to another. Piping, as the term suggests, can redirect the standard output, input, or error of one process to another for further processing.