xscreenshot is a screenshot utility for X. For more information about it's usage check `man xscreenshot`. This program requires libxcb, libxcb-xfixes and libpng to be installed. In order to build this program you need to run `make`. This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License version 2 as published by the Free Software Foundation. See COPYING for more details.