OpenFire on Ubuntu

> aptitude install sun-java6-bin sun-java6-jdk sun-java6-jre
> wget http://www.igniterealtime.org/downloadServlet?filename=openfire/openfire_3.6.4_all.deb
> dpkg -i openfire_3.6.4_all.deb

access
http://<IPADDRESS>:9090

Make user and group. and Enable contact list group sharing.