adb server is out of date. killing

I’m creating my first react-native project with this tutorial: http://facebook.github.io/react-native/ When it comes to executing code and running react-native run-android I am getting: And the app on the android device is obviously not working. I’ve reinstalled the SDK, tried to adb kill-server and adb start-server, but nothing seems to work I’m using Android 4.4 and Ubuntu 14.04

What is the difference between React Native and React?

ReactJS is a JavaScript library, supporting both front-end web and being run on a server, for building user interfaces and web applications. It follows the concept of reusable components. React Native is a mobile framework that makes use of the JavaScript engine available on the host, allowing you to build mobile applications for different platforms … Read more