Step 6: Enable Hadoop Security
Cloudera recommends that all of the Hadoop configuration files throughout the cluster have the same contents.
To enable Hadoop security, add the following properties to the core-site.xml file on every machine in the cluster:
<property> <name>hadoop.security.authentication</name> <value>kerberos</value> <!-- A value of "simple" would disable security. --> </property> <property> <name>hadoop.security.authorization</name> <value>true</value> </property>