install nodejs on raspberry pi

Just follow the steps below.

Download Node.js source Raspberry Pi Model A, B, B+ and Compute Module

wget https://nodejs.org/dist/v4.0.0/node-v4.0.0-linux-armv6l.tar.gz 
tar -xvf node-v4.0.0-linux-armv6l.tar.gz 
cd node-v4.0.0-linux-armv6l

Raspberry Pi 2 Model B

wget https://nodejs.org/dist/v4.0.0/node-v4.0.0-linux-armv7l.tar.gz 
tar -xvf node-v4.0.0-linux-armv7l.tar.gz 
cd node-v4.0.0-linux-armv7l

Copy to /usr/local

sudo cp -R * /usr/local/

That's it! To check Node.js is properly install and you have the right version, run the command node -v