nvm is a Node.js version manager that allows users to run multiple versions of Node.js on the same machine. Below are some commonly used nvm commands and their usage:

1. nvm install <version>: Installs the specified version of Node.js. For example, to install Node.js version 14.17.0, run the following command:

   1	nvm install 14.17.0

2. nvm use <version>: Switches to the specified version of Node.js. For instance, to use Node.js version 14.17.0, run:

   1	nvm use 14.17.0

3. nvm ls: Lists all currently installed Node.js versions.

4. nvm ls-remote: Displays all available Node.js versions.

5. nvm uninstall <version>: Uninstalls the specified version of Node.js.

6. nvm alias <name> <version>: Creates an alias for a specified version. For example, to create an alias default for Node.js version 14.17.0, use the command:

   1	nvm alias default 14.17.0

   After running this command, the Node.js version with the alias default will be automatically used each time you open a terminal.

7. nvm current: Shows the version number of the currently active Node.js.

8. nvm version: Displays the currently installed version of nvm.

These are some of the commonly used nvm commands and their functionalities. You can run nvm --help or check the nvm documentation for more information.