Step 1: Add NodeJs PPA
First you need to node.js ppa in our system provide by nodejs official website. We also need to install python-software-properties package if not installed already.
$ sudo apt-get install python-software-properties $ curl -sL https://deb.nodesource.com/setup_6.x | sudo -E bash -
Step 2: Install Node.js and NPM
After adding required PPA file, lets install Nodejs package. NPM will also be installed with node.js. This command will also install many other dependent packages on your system.
$ sudo apt-get install nodejs