This guide was translated and summarized (stolen) from:Ubuntu 14.04.x LTS - Guacamole HTML5 Remotedesktop Gateway installieren mit Apache Reverse Proxy [http://znil.net/index.php?title=Ubuntu_14.04.x_LTS_-_Guacamole_HTML5_Remotedesktop_Gateway_installieren_mit_Apache_Reverse_Proxy#Upgrade_von_0.9.6_auf_