Use one of these techniques to install node and npm without having to sudo. Discussed in more detail at http://joyeur.com/2010/12/10/installing-node-and-npm/ Note: npm >=0.3 is *safer* when using sudo.

node-and-npm-in-30-seconds.sh

#curl https://gist.githubusercontent.com/tyrsius/7324aaa515ade384cb1c/raw/927e4cd87d54a64c7a4ffc3b14739e5437346c35/node-and-npm-in-30-seconds.sh | sh
#echo 'export PATH=$PATH:$HOME/bin/node/bin' >> ~/.bashrc
. ~/.bashrc
mkdir bin -p
cd ~/bin
mkdir node -p
rm -rf install-node 
mkdir install-node -p
cd install-node
curl https://nodejs.org/dist/v4.2.0/node-v4.2.0.tar.gz | tar xz --strip-components=1
./configure --prefix=~/bin/node
make install
curl https://raw.githubusercontent.com/npm/npm/master/scripts/install.sh | sh
cd ~/bin
rm -rf install-node