查看大文件

find . -type f -size +1G  //查看大于1G的文件

清理var/log目录

du -h -d 1 //排序列出文件夹大小

see this page link for details, http://npmmirror.com/

npm install -g cnpm --registry=https://registry.npmmirror.com

OR

npm config set registry https://registry.npmmirror.com