Once the instance is running, enter the public DNS provided by Amazon into your browser. You will then see the Bitnami Welcome Page. Click the 'Access my application' link to visit the Jenkins application. You can go to '/limesurvey/admin' from your browser to access the application administration panel. You should use the default username, 'user' and the default password, 'bitnami', to access the application. You may change this username and password within the application settings. You can also SSH to the machine using the username 'bitnami' and your Amazon private key.