Angular 2 + Common Issues and Fixes

The main tutorial 
https://angular.io/docs/ts/latest/quickstart.html#!#main
https://www.youtube.com/watch?v=W14_ZArh6eo

Angular2 QuickStart npm start is not working correctly.

• make sure set access permission to /usr/lib/mode_modules.
• make sure to run with sudo.
• sudo npm install -g concurrently     
• sudo npm install -g lite-server     
• sudo npm install -g typescript