I am following the tutorial: https://hortonworks.com/tutorial/realtime-event-processing-in-hadoop-with-nifi-kafka-and-storm/section/2/ Based on initial requirements, I have download the sandbox: HDF_3.0.2.0_vmware_28_11_2017.ova When I started the VM, I got the host and IP for Welcome screen and SSH terminal (Untitled.png). I registered the host in my windows hosts file. I am able to open the SSH terminal (on Gitbash and chrome both) and change the root password successfully. I am also able to go to the Welcome screen. When I click on Dashboard, it opens 2 tabs. 1 tab is for tutorial which is working fine. Another tab is for Ambari dashboard, which cannot be opened. It is giving me "refuse to connect" error. When I go to SSH terminal and try to check status or start ambari service I receive following error. [root@sandbox-hdf ~]# ambari-server status Using python /usr/bin/python Ambari-server status Traceback (most recent call last): File "/usr/sbin/ambari-server.py", line 36, in <module> from ambari_server.dbConfiguration import DATABASE_NAMES, LINUX_DBMS_KEYS_LIST File "/usr/lib/python2.6/site-packages/ambari_server/dbConfiguration.py", line 28, in <module> from ambari_server.serverConfiguration import decrypt_password_for_alias, get_ambari_properties, get_is_secure, \ File "/usr/lib/python2.6/site-packages/ambari_server/serverConfiguration.py", line 593, in <module> configDefaults = ServerConfigDefaults() File "/usr/lib/python2.6/site-packages/ambari_server/serverConfiguration.py", line 503, in __init__ super(ServerConfigDefaultsLinux, self).__init__() File "/usr/lib/python2.6/site-packages/ambari_server/serverConfiguration.py", line 387, in __init__ self.check_if_directories_writable([self.OUT_DIR, self.PID_DIR]) File "/usr/lib/python2.6/site-packages/ambari_server/serverConfiguration.py", line 439, in check_if_directories_writable raise FatalException(-1, "Unable to access {0} directory. Confirm the directory is created and is writable by Ambari Server user account '{1}'".format(directory, getpass.getuser())) ambari_commons.exceptions.FatalException: "Fatal exception: Unable to access directory. Confirm the directory is created and is writable by Ambari Server user account 'root', exit code -1" [root@sandbox-hdf ~]# ambari-server start Using python /usr/bin/python Starting ambari-server Traceback (most recent call last): File "/usr/sbin/ambari-server.py", line 36, in <module> from ambari_server.dbConfiguration import DATABASE_NAMES, LINUX_DBMS_KEYS_LIST File "/usr/lib/python2.6/site-packages/ambari_server/dbConfiguration.py", line 28, in <module> from ambari_server.serverConfiguration import decrypt_password_for_alias, get_ambari_properties, get_is_secure, \ File "/usr/lib/python2.6/site-packages/ambari_server/serverConfiguration.py", line 593, in <module> configDefaults = ServerConfigDefaults() File "/usr/lib/python2.6/site-packages/ambari_server/serverConfiguration.py", line 503, in __init__ super(ServerConfigDefaultsLinux, self).__init__() File "/usr/lib/python2.6/site-packages/ambari_server/serverConfiguration.py", line 387, in __init__ self.check_if_directories_writable([self.OUT_DIR, self.PID_DIR]) File "/usr/lib/python2.6/site-packages/ambari_server/serverConfiguration.py", line 439, in check_if_directories_writable raise FatalException(-1, "Unable to access {0} directory. Confirm the directory is created and is writable by Ambari Server user account '{1}'".format(directory, getpass.getuser())) ambari_commons.exceptions.FatalException: "Fatal exception: Unable to access directory. Confirm the directory is created and is writable by Ambari Server user account 'root', exit code -1" [root@sandbox-hdf ~]# - Why root user is having permission issues on machine? - What is required to start and run ambari service and its dashboard? Anything I am missing? ... View more