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 omitted, it defaults to ":1". FILENAME must end in a known image
format extension (eg ".png", ".jpeg"). Supported options are
Display command line help information
Do not display information on the console when capturing the screenshot, with the exception of any
Display verbose debugging information on the console
The exit status is 0 upon successful screen capture, otherwise it is a non-zero integer
# gvnccapture localhost:1 desktop.png
Connected to localhost:1
Saved display to desktop.png
Daniel P. Berrange <firstname.lastname@example.org>
Copyright (C) 2010 Daniel P. Berrange <email@example.com>.
License LGPLv2+: GNU Lesser GPL version 2 or later <http://gnu.org/licenses/gpl.html>.
This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent
permitted by law.