It is responsible for a one-way connection path front duct standard output sequence after a standard input program, which is essentially a shared file. Our daily is the most commonly used pipe anonymous pipes, pipe symbol in the Shell is "|".
References:
1. On the Linux command xargs URL: https://www.360kuai.com/pc/93ea553993e938746?cota=4&kuai_so=1&tj_url=so_rec&sign=360_57c3bbd1&refer_scene=so_1