通过PPA安装Node.js
sudo apt-get install python-software-properties
sudo add-apt-repository ppa:chris-lea/node.js
sudo apt-get update
sudo apt-get install nodejs
目前只能通过PPA安装稳定版本的Node.js
查看是否安装成功及版本号：
～$ node --version
v0.6.12
curl安装:
sudo apt-get install curl
npm安装:
curl -k https://npmjs.org/install.sh | sudo sh Note: npm included in new versions of node.js. No need to install it separately now.