Install Node.js on Ubuntu

Simply follow the instructions given here:

Example install:

sudo apt-get install python-software-properties python g++ make
sudo add-apt-repository ppa:chris-lea/node.js
sudo apt-get update
sudo apt-get install nodejs

It installs current stable Node on the current stable Ubuntu. Quantal
(12.10) users may need to install the software-properties-common
package for the add-apt-repository command to work: sudo apt-get install software-properties-common

As of Node.js v0.10.0, the nodejs package from Chris Lea’s repo
includes both npm and nodejs-dev.

Don’t give sudo apt-get install nodejs npm. Just sudo apt-get install nodejs.