Before you run Control Center, ensure that your system has the prerequisite software and configuration.
To run Control Center you must have a Java2 Runtime Environment (JRE) of version 1.4.1 or greater installed.
Control Center also requires that the PostgreSQL - Red Hat Edition JDBC driver package (rh-postgresql-jdbc) be installed. Please ensure that the path to the JAR file installed by rh-postgresql-jdbc (rh-postgresql3.jar) is included in your CLASSPATH environment variable.
The JAVA_HOME environment variable must point to the desired Java JRE. You must make sure that the java command returned by which java is the one from the same JRE. There may be other java commands in your path, so you need to make sure that the correct bin JRE subdirectory is ahead of any others in your PATH environment variable. In particular, a /usr/bin/java path may exist that uses the GNU Java runtime, not the Sun or IBM ones.