In this tutorial, we will cover how to install Node.js and npm on a Debian 9 system. Node.js is an open source cross-platform JavaScript run-time environment built on Chrome’s JavaScript engine that allows server-side execution of JavaScript code. It is mainly used to build server-side applications, but it is also very popular as a full-stack and front-end solution. npm is the default package manager for Node.js and the world’s largest software registry. In this tutorial we will show you two different ways to install Node.js on Debian. Choose the installation option that is best for you.