在Ubuntu下准备Nodejs开发环境

~ sudo apt-get install nodejs
~ sudo apt-get install npm

通过apt-get安装nodejs 后：
~ node -v

出现：
The program 'node' can be found in the following packages:
 * node
 * nodejs-legacy
Try: apt-get install <selected package>


解决：
sudo ln -s `which nodejs` /usr/local/bin/node  原文
 安装Express:

With Express 4, the application generator was removed and is now available as 'express-generator.' 
So you need to ：npm install -g express-generator instead.