I installed Hortonworks Sandbox via Virtualbox. And when i start ambari every service is red like you can see in this screenshot . Have i missed something or what? i cannot do anything... i'm a beginner with hadoop.
I'm glad you decided to try it out!
From the screenshot, it looks like all the services are currently in the Stopped state. You should see a big button that says Actions; this will produce a drop down menu with different actions listed.
What happens when you click on the Action button, and then select Start All Services?
Nothing happens when I click on the action button and then on start all services. I even tried to start each service alone but still nothing is happening.