1. Preparation before using the integration API The one-time authentication key, the authentication code used by BaroPAM, is written based on Java, so the latest JDK 6.x or higher must be installed. If it is not installed, you need to install the latest JDK. Verify JDK installation) [root]# rpm -qa | grep java java-1.4.2-gcj-compat-devel-1.4.2.0-40jpp.115 java-1.7.0-openjdk-javadoc-1.7.0.131-2.6..