@Aniruddh KendurkarFor first SSH login you can use credentials root/hadoop but then it prompts to change password. Also , Ambari server web UI credentials are not admin/admin , you need to reset the ambariserver password. Detailed Guide : http://hortonworks.com/hadoop-tutorial/learning-the-ropes-of-the-hortonworks-sandbox/#setup-ambari-admin-password http://hortonworks.com/hadoop-tutorial/learning-the-ropes-of-the-hortonworks-sandbox/#ways-execute-terminal-command ... View more