nodejs gyp WARN EACCES user "root" does not have permission to access the dev dir

node.js  v4.2.2 安装time模块是出错

gyp WARN EACCES user "root" does not have permission to access the dev dir "/home/countly/nodejs/lib/node_modules/time/.node-gyp/0.10.36"

gyp WARN EACCES attempting to reinstall using temporary dev dir "/home/countly/nodejs/lib/node_modules/time/.node-gyp"

百度了好久资料，终于发现了解决办法，特此记录

sudo  npm install time   -g --unsafe-perm 

增加了--unsafe-perm  

顺便写一下新颁布 express 的安装

npm  -g install express 

npm -g install express-generator