Package gvnc-tools

Command line VNC tools

http://live.gnome.org/gtk-vnc

Provides useful command line utilities for interacting with
VNC servers. Includes the gvnccapture program for capturing
screenshots of a VNC desktop

General Commands (Section 1)
gvnccapture
Capture a screenshot of the VNC desktop at HOST:DISPLAY saving to the image file FILENAME. If HOST is omitted it defaults to "localhost", if :DISPLAY is...