A note about Java: I noticed that there was no java command when I first installed this by copying the compressed image into a spare partition. I needed to run "sudo update-alternatives --config java" at which point I could then choose the correct runtime and the "java" command was created.
There is only 1 program which provides java (/usr/lib/jvm/java-6-openjdk/jre/bin/java). Nothing to configure.