Managing Different Versions of Node.js on Linux

In this tutorial, we provide a comprehensive guide on managing different versions of Node.js on a Linux system. Using multiple versions of Node.js is often necessary when working on different projects that require specific versions. In this guide, we'll show you how to switch between versions seamlessly using tools like nvm (Node Version Manager). This tutorial was originally created in 2016, and we’ve included any critical updates to ensure you have the latest information.

Step 1: Installing Node Version Manager (nvm)

To effectively manage multiple versions of Node.js, the Node Version Manager (nvm) is the best tool to use. It allows you to easily install, update, and switch between different versions of Node.js.

1. Install nvm by running the following command in your terminal:

   curl -o- https://raw.githubusercontent.com/nvm-sh/nvm/v0.39.1/install.sh | bash
   

   This command will download and install nvm on your system.

2. Load nvm into your current terminal session:

   source ~/.nvm/nvm.sh
   

   You may need to restart your terminal for the changes to take effect.

Critical Update (2024): The latest version of nvm is v0.39.1, which provides better compatibility and more features. Always check the nvm GitHub page for the latest version.

Step 2: Installing and Managing Node.js Versions

With nvm installed, you can now install different versions of Node.js as needed.

1. Install a Specific Version:

   nvm install 16
   

   Replace 16 with the version number you need. For example, you can install Node.js version 18 by running nvm install 18.

2. Check Installed Versions:

   nvm list
   

   This will display all the versions of Node.js installed on your system.

3. Switch Between Versions:

   nvm use 16
   

   Use the version number that you want to activate for your current terminal session. This flexibility is very useful when switching between projects with different requirements.

Note: It is recommended to use Node.js version 18 or higher for improved performance and compatibility with modern JavaScript features.

Step 3: Setting a Default Node.js Version

If you frequently use a specific version of Node.js, you can set it as your default version.

1. Set a Default Version:

   nvm alias default 16
   

   This ensures that whenever you open a new terminal session, Node.js version 16 will be automatically activated.

Step 4: Uninstalling Node.js Versions

If you no longer need a particular version of Node.js, you can easily uninstall it to save space and reduce clutter.

1. Uninstall a Version:

   nvm uninstall 16
   

   This command will remove the specified version from your system.

Conclusion

Managing multiple versions of Node.js on a Linux system is made simple with nvm. This tool allows you to install, switch, and remove Node.js versions easily, making it an essential utility for developers working on projects with varying requirements.

Using nvm ensures that you can keep your development environment organized and that your projects use the Node.js version they need for optimal functionality. Make sure to always check for updates and use the latest LTS version to ensure the best performance and security.