Have you read the documentation in /usr/share/doc/libapache2-mod-jk ? What about on the apache tomcat website?
I didn't find much documentation on the Apache-Tomcat website. I found this: http://www.switch.ch/aai/docs/shibboleth/SWITCH/1.3/idp/run-tomcat-unprivileged.html I'll be gong to Amsterdam this afternoon to buy me the Tomcat Bible. Thank you all for your help. Regards, Joachim