After the configuration of idP, use following command to test it:
./resolvertest --idpXml=file:///usr/local/shibboleth-idp/etc/idp.xml --requester=https://ktang.oerc.ox.ac.uk/shibboleth --user=David.Wallom
* Sometime you may find tomcat has problem to load Idp servlet, some information like:
Idp servlet is not available will be displayed when user browser is directed to idp.
Make sure you start tomcat process as root, otherwise some privlige issues might be the reasons!!
* Some code of Shibboleth-idp need to be modifed before installation, otherwise.........