Sehr kurze Debian-Anleitung

node.js 4.x Installation:

sudo apt-get update
sudo apt-get upgrade
sudo apt-get install curl build-essential
sudo curl -sL https://deb.nodesource.com/setup_4.x | sudo bash -
apt-get install -y nodejs

Falls danach node -v nichts gibt, dann noch
sudo ln -s /usr/bin/nodejs /usr/bin/node

ioBroker installation:

sudo mkdir /opt/iobroker
sudo chmod 777 /opt/iobroker
cd /opt/iobroker
sudo npm install iobroker --unsafe-perm