2.2.1. Using up2date / RHN (Preferred Method)
up2date your RHEL4 installation and install the JVM as described above.
Subscribe to the Red Hat Application Stack child channel:
e.g: rhel-x86_64-as-4-appstk-1 or rhel-i386-as-4-appstk-1
Install JBoss AS:
For the Application Server (which includes an embedded Tomcat), run:
up2date jbossas
Refer also to Chapter 4, Using JBoss AS below.