You must have adequate disk space to install JDK and JBoss Enterprise Application Platform while also allowing enough space for your applications. Before installing JBoss Enterprise Application Platform you must have a working installation of Java. Since JBoss is 100% pure Java you can have it working on any Operating System / Platform that supports Java. However there are a few Operating System-specific issues that you must be aware of. Refer to http://wiki.jboss.org/wiki/Wiki.jsp?page=JBossOperatingSystemSpecificIssues for more information.