pipexec Build a network of processes and connecting pipes - and have them act like a single process. Introduction and Purpose pipexec has two major use cases. Use Case 1: Handling Arbitrary Pipes between Processes Basics When it comes to pipes in shells many tutorials introduce stdin, stdout and stderr which map to file descriptors 0, 1 and 2 respectively. If you want to know how many lines contains the word bird in chapter 1 and 2 of your text, you can use a command like: $ cat Chap1.txt Chap2....