How to Install and Manage Node.js via NVM

TIKAM CHAND–How To, JavaScript, NodeJS–

NVM is known as Node Version Manager, Similarily to RVM (Ruby Version Manager) for Ruby language. NVM provides an option for easy installation of Node.js. You can also install specific Node.js version or multiple Node.js versions on the same system using nvm and use the required version for application. This tutorial will help you to Install and Manage Node.js using NVM.

The default NVM installs under current users home directory, So nvm installation with one user will not be accessible to another user. Windows users can visit our other tutorial to install Nodejs on Windows system.

Step 1 – Install NVM

First of all, You need to install NVM on your system. A bash script is available to install nvm on your system. Use the following command to install NVM on your Linux system.

curl https://raw.githubusercontent.com/creationix/nvm/master/install.sh | bash

Reload system environment using this command. It will set the required environment variables to use nvm on the system.

source ~/.profile     ## Debian based systems 
source ~/.bashrc      ## CentOS/RHEL systems

Step 2 – Find Available Node.js Version

At this point, you have installed nvm on your system for the current user. Now find out the available version of Node.js to install. Use ls-remote option to list versions.

nvm ls-remote

You will see a long list of available versions.

  ...
  ...
       v10.12.0
       v10.13.0   (LTS: Dubnium)
       v10.14.0   (LTS: Dubnium)
       v10.14.1   (LTS: Dubnium)
       v10.14.2   (LTS: Dubnium)
       v10.15.0   (Latest LTS: Dubnium)
        v11.0.0
        v11.1.0
        v11.2.0
        v11.3.0
        v11.4.0
        v11.5.0
        v11.6.0
        v11.7.0
        v11.8.0

Step 3 – Node.js Installation with NVM

Now install the node.js version you need to use for running node.js application. Below command will install node.js v8.10.0 the LTS release on your system.

nvm install v10.15.0

You can have also installed the latest version of Node.js.

nvm install v11.8.0

Repeat the above command with the different-2 node.js versions to install multiple versions of node.js on your system.

Step 4 – Set Node.js Default Version

As you have installed multiple node.js versions, You can select the specific version of node.js as default version used by system and load in the environment. Use below command to list currently installed version and default set version.

nvm list

       v10.15.0
        v11.8.0
->       system
node -> stable (-> v11.8.0) (default)
stable -> 11.8 (-> v11.8.0) (default)
iojs -> N/A (default)
unstable -> N/A (default)
lts/* -> lts/dubnium (-> v10.15.0)
lts/argon -> v4.9.1 (-> N/A)
lts/boron -> v6.16.0 (-> N/A)
lts/carbon -> v8.15.0 (-> N/A)
lts/dubnium -> v10.15.0

You can see that Node.js version 11.8.0 is set as the default version. You can change the default Node.js version. Below command will set 10.15.0 as default Node.js version.

nvm use v10.15.0

Now verify current active version of node.js

node --version

v10.15.0

Step 5 – Run Applition with Specific Version

If you have multiple node.js applications on your system and want to run each with a specific version of node.js. NVM provides you an option to use node.js version for running any application. For example

nvm run v10.15.0 app.js

Step 6 – Remove Unused Node.js Version

This command will provide a list of installed versions of node.js on your system.

nvm list

Now remove any version installed on your system using the following command. Below command will remove Node.js version 10.15.0 from your system.

nvm remove v10.15.0