A problem occurred when ubuntu npm installed express and hexo?

  node.js, question
sudo npm install express
 npm ERR!  Linux 4.2.0-42-generic
 npm ERR!  argv "/usr/local/bin/node" "/usr/local/bin/npm" "install" "express"
 npm ERR!  node v7.0.0-pre
 npm ERR!  npm  v3.10.3
 
 npm ERR!  cb is not a function
 npm ERR!
 npm ERR!  If you need help, you may report this error at:
 npm ERR!  <https://github.com/npm/npm/issues >
 
 npm ERR!  Please include the following file with any support request:
 npm ERR!  /home/jundong/code/blog/npm-debug.log

Italic Type
为什么会出现这种错误,安装其他包的时候也有问题

安装express也会报错?

安装express

It seems to be a question of authority. Try it.sudocarry out


Sorry, I didn’t look at it carefully just now. It seems to be a bug.https://github.com/npm/npm/is …
Your node 7.0 should not be a stable version. If you are studying, please install a stable version.