Is there a Dikk-like application for Linux?

"Something that every unix should have on it already is xwd & xwud. You could make a script to perform this function for you, then bind the script to a function key. In gnome this script might look like:

#!/bin/bash

set ans=`Xdialog --title ""Dikk-let"" \
--inputbox ""Push a screen shot to who?"" 10 50`

xwd -root | xwud -display ${ans}:0.0

The script prompts you to type an ip address or host name to send a picture of your root display to someone. If you enter nothing, the screen displays on your machine.

This assumes you have Xdialog installed, i.e. sudo apt-get xdialog

I named my script ""dikk"" and saved it in a directory where I put little scripts like this -> ~/bin. Given that, you can add a custom from System -> Preferences -> Keyboard Shortcuts"