Guacamole

--- instalando ---

wget -c http://ufpr.dl.sourceforge.net/project/guacamole/current/binary/debian-6.0-amd64/guacamole-0.8.0-debian-6.0-amd64.tar.gz
tar zxvf guacamole-0.8.0-debian-6.0-amd64.tar.gz
cd guacamole-0.8.0-debian-6.0-amd64
apt-get update
apt-get upgrade
dpkg -i *.deb
apt-get -f install

no dialogo pós-instalação marcar:

• reiniciar o tomcat, sim

--- instalando servidor vnc ---

apt-get install tightvncserver
vncserver 

insera senha (exemplo 1q2w3e)

--- ajustando configuração ---

mv /etc/guacamole/user-mapping.xml /etc/guacamole/user-mapping.xml-exemplo

e no arquivo /etc/guacamole/user-mapping.xml insira <user-mapping>

   <authorize username="nosdigitais" password="nosdigitais">
       <protocol>vnc</protocol>
       <param name="hostname">localhost</param>
       <param name="port">5901</param>
       <param name="password">1q2w3e</param>
   </authorize>

</user-mapping>

-- reinice os serviços --

/etc/init.d/tomcat6 restart
/etc/init.d/guacd restart