See setting up ubuntu server cheat sheet.

sudo apt-get install g++ curl libssl-dev

sudo apt-get install git-core

git clone git://github.com/joyent/node

cd node
./configure
make
sudo make install

Install NPM (Node Package manager)

Isaac Schlueter suggests giving yourself permission to the “/usr/local directory instead of using sudo. You should read his post.

sudo chown -R $USER /usr/local

curl http://npmjs.org/install.sh | sh

Help:

npm help

Install:

npm install |your package|