How to install Node.js and npm on Raspberry Pi

Node.js is a powerful open source cross-platform JavaScript running environment based on the Google V8 JavaScript engine. It provides asynchronous event-driven I/O, making it more suitable for building high-performance, scalable network applications. As a Node.js developer, we need to install the dependency package processing tool-npm.

This article will guide you how to install Node.js and its package manager npm on Raspberry Pi.

Preparation
1. Install Raspberry Pi OS
If you have not installed the operating system on the Raspberry Pi, please first install the Raspberry Pi OS according to the official documentation.

2. Update system
Before starting to install Node.js and npm, please make sure your system has been updated to the latest version. You can update your system by executing the following command:

sudo apt-get update
sudo apt-get upgrade

Install Node.js
Multiple versions are supported on Raspberry Pi Node.js. You can install the latest or older versions of Node.js from the official website or other third-party sources. Here we use NodeSource official source to install the latest version of Node.js.

1. Add NodeSource warehouse key for Node.js:

curl -sL https://deb.nodesource.com/setup_14.x | sudo bash -

Please note that here we take Node.js version 14.x as an example. You can find the latest version on the official website.

2. Install Node.js:

sudo apt-get install nodejs

After the installation is complete, you can check the Node.js version through the following command:

node -v

If you have successfully installed Node.js, the Node.js version number will be displayed.

Install npm
npm is the Node.js package manager, which is one of the core components of Node.js. It makes it easier for developers to share and reuse code used in Node.js.

1. In order to install the latest version of npm, please use the following command:

sudo npm install npm@latest -g

2. After the installation is complete, you can use the following command To check the npm version:

npm -v

Check if Node.js and npm are working properly
Now, you have installed Node.js and npm on your Raspberry Pi. To make sure they are working properly, create a simple JavaScript file and run it.

1. Create a new .js file in the terminal, such as test.js. You can use a text editor such as nano or vim to create the file.

nano test.js

2. Paste the following code into the file:

console.log("Hello, World!");

3. Save and close the file.

4. Run the following command in the terminal:

node test.js

If you see the string "Hello, World!" in the terminal, congratulations You, you have successfully installed and run Node.js and npm!

Conclusion
Installing Node.js and npm on the Raspberry Pi is very simple. Just add the official sources, install Node.js and npm. Remember, Node.js and npm not only speed up application development, but also make applications more reliable, so they are worth learning and using by every Node.js developer.

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