n

The command line tool "n" is a version manager for the Node.js runtime. It allows users to easily switch between different versions of Node.js on their system.

Key features of "n" include:

1. Easy installation: "n" can be installed with npm, the package manager for Node.js, making it straightforward to set up and start using.

2. Version management: It provides commands to install, uninstall, and switch between different versions of Node.js. This is helpful when working on projects that require specific versions of Node.js, or when testing compatibility with different versions.

3. Concurrent installations: "n" can manage multiple versions of Node.js on the same machine, enabling users to have different versions coexisting and easily switch between them as needed.

4. Lightweight: The tool is designed to be lightweight and fast, minimizing resource consumption.

5. Compatibility: "n" is compatible with major operating systems, including Linux, macOS, and Windows.

Overall, "n" simplifies the management of Node.js versions, making it an efficient tool for developers who work on multiple projects, need specific versions for compatibility reasons, or want to test their code on different Node.js versions.