Cli

Node Version Manager (NVM) is a CLI tool to manage versions of node js. You can manage mutiple vesions of node js on one environment. This is quite useful because you can switch to any version of node js with one command.

When you download and install a new software on your mac, do you manually download it from the website, and install it by following the installation wizard? If so, you should stop it and start using Homebrew instead.

When you interact with a computer, you are most likely to use mouse or tract pad, clicking some icons or buttons beautifully displayed on the screen. But if you are a developer, along with the Graphical User Interface (GUI), you also use Command Line Interface (CLI).