Node 升级

 I used the following instructions to upgrade from Node.js version 0.10.6 to 0.10.21 on a Mac.
Clear NPM's cache:
# sudo npm cache clean -f

Install [a little helper called 'n'](http://github.com/visionmedia/n)
# sudo npm install -g n

Install latest stable Node.js version
# sudo n stable

Alternatively pick a specific version and install like this:
# sudo n 0.8.20

原文地址 https://davidwalsh.name/upgrade-nodejs