Installing Node.js Tutorial: Using nvm
See the original posting on DZone Python
As with any programming language, platform, or tool, the first step to using it is getting it installed. Many of them typically come with a speedy way to upgrade when a new version is available.
By default, there’s not a way to upgrade the version of Node.js you’ve got from within Node.js itself. That said, there’s a fantastic tool for the community called nvm that allows you to manage the versions of Node.js that you’ve got installed locally.