if you vant to try guacamole 0.9.9 on Centos 6/7:
yum install -y wget
wget http://sourceforge.net/projects/guacamoleinstallscript/files/CentOS/guacamole-install-script.sh
chmod +x guacamole-install-script.sh
./guacamole-install-script.sh
Follow the wizard and then go to:
https://host/guacamole
More info on the Guacamole Install Script page
Task of this script:
Install Packages Dependencies
Download Guacamole and MySQL Connector packages
Install Guacamole Server
Install Guacamole Client
Install MySQL Connector
Configure MariaDB or MySQL
Setting Tomcat Server
Generates a Java KeyStore for SSL Support
Install and Setting Nginx Proxy (SPDY enabled)
Generates a Self-Signed Certificate for SSL Support
Configure SELinux for Nginx Proxy
Configure FirewallD or iptables