//put the classpath righ export CLASSPATH=$CLASSPATH:/classes

// Compile in this order : javac -d $CLASSPATH Info_itf.java

javac -d $CLASSPATH Chat.java

javac -d $CLASSPATH ChatImpl.java

javac -d $CLASSPATH ChatServer.java

javac -d $CLASSPATH ChatClient.java

//launch rmiregistry on mandelbrot on port 6090 rmiregistry 6090 &

//launch the server java -Djava.rmi.server.hostname=localhost -cp classes ChatServer 6090

//launch the client java -cp classes/ ChatClient localhost 6090