To install x11vnc just follow these instructions.
sudo apt-get install x11vnc
Which will install x11vnc and any other packages on which it depends.
|Maintainer||Fathi Boudra <firstname.lastname@example.org>|
|Description||VNC server to allow remote access to an existing X session display corresponding to a physical monitor, keyboard, and mouse) with any VNC viewer. It has built-in SSL encryption and authentication, UNIX account and password support, server-side scaling, single port HTTPS and VNC, mDNS service advertising, and TightVNC and UltraVNC file-transfer.|