add
sudo add-apt-repository ppa:rwky/nodejs
sudo apt-get update
sudo apt-get install nodejs
remove
sudo rm -rf /etc/apt/sources.list.d/rwky-nodejs-trusty.list*
sudo add-apt-repository ppa:rwky/nodejs
sudo apt-get update
sudo apt-get install nodejs
sudo rm -rf /etc/apt/sources.list.d/rwky-nodejs-trusty.list*