title: Failed to run Angular5
body: <p>I installed one Angular5 followed the guide on Angular website, but I cannot get nothing when I run ng -v
  <a href="https://i.stack.imgur.com/Eeviw.png" rel="nofollow noreferrer">enter image description here</a></p>
  
  <p><a href="https://i.stack.imgur.com/Qj84m.png" rel="nofollow noreferrer">enter image description here</a></p>
  
  <p><a href="https://i.stack.imgur.com/LFSP2.png" rel="nofollow noreferrer">enter image description here</a></p>
  
  <p>The warning said that no such ‘node’ file in usr/bin/env, but I can find my installed angular in the path usr/local/lib/node_moudles. What is wrong with it, should I remove all npm plugin and reinstall them again(or change to the right directory)?</p>