XWD: how to take SCREENSHOTS in X WINDOW SYSTEM

A screenshot is an image taken from the monitor screen.
It could comprise whole screen or a smaller part of it, usually a window.

XWD TOOL

X Window System provides an utility to dump images from a X Window: xwd.

xwd stores window images in a special format "xwdump".
This format can be used by other X tools too.


Other tools are also available:
convert from ImageMagick, KSnapshot, gnome-screenshot, ...


We install xwd (in debian, ubuntu):
$ sudo aptitude install x11-apps

CAPTURE WHOLE SCREEN

We could capture entire screen or some window only.
Whole screen in X Window System is associated also to a window: the root window.

Getting root window screenshots:

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