安装Docker的时候文档中Installing bash completion scripts这一段没看懂

Question

安装Docker的时候文档中Installing bash completion scripts这一段没看懂,是说要怎么做？
https://docs.docker.com/machine/install-machine/

Answer 1

This is just a smart prompt plug-in for installation commands. Its function is that after typing docker, you can press the tab key to complete the container id, container name and some parameters

You don’t need to install it if you don’t need it