nodejs init config

config npm

npm config ls
npm config set cache "D:\nodejs\node_cache"
npm config set prefix "D:\nodejs\node_global"

config environment

NODE_HOME = "D:\nodejs"
%NODE_HOME%\;%NODE_HOME%\node_cache\;%NODE_HOME%\node_global\

config taobao mirror registry

npm install -g cnpm --registry=https://registry.npm.taobao.org