I have an old jboss installation running on an old RHEL box that I would like to move to another upgraded RHEL, joss version is 3.2.3.
Would it be sufficient to move the jboss directory or does it store any config files anywhere else?
You should be fine, if you move the entire Jboss folder. Please check your startup script and ensure that none of the config files are outside the Jboss folder.
Running (ps -ef | grep -i jboss) will show you the command line options being used to start Jboss and it should also show you the config file being specified.
And finally, make sure you have a compatible Java version installed on the new server.