I want to use JDBC with postgresql. I installed postgresql, and I tried a Java program from postgresql JDBC examples (called basic.java), but I get the error: Exception caught : java.lang.ClassNotFoundException: org.postgresql.Driver ,etc.... My CLASSPATH is ok I think. $ echo $CLASSPATH /usr/local/jdk1.2.2/classes/postgresql.jar And that is the location where is the JDBC driver. Can you help me? Bogdan