node.js升级后npm工作报错

node升级后npm工作报错如下：

npm ERR! Cannot find module 'internal/fs'
npm ERR!
npm ERR! If you need help, you may report this error at:
npm ERR!
npm ERR! Please include the following file with any support request:
npm ERR! /Users/i318043/z/react/user-dashboard/npm-debug.log

解决办法如下(mac)：改为旧版本node，安装npm，在将node更新到稳定版。

$ sudo n 6.9.1
$ sudo npm -g install npm@next
$ sudo n stable