Resources for adding "show desktop" icon on Plank (default dock on elementary OS Freya).
##Install:
The first step, install wmctrl package:
sudo apt-get install wmctrl
Next step, download and install script:
cd /tmp && wget https://github.com/png2378/showdesktop/archive/master.zip
unzip master.zip && cd showdesktop-master
sudo mv showdesktop /usr/local/bin/ && sudo mv showdesktop.desktop /usr/share/applications/ && sudo mv showdesktop.svg /usr/share/icons/elementary/apps/48/
The finish step, add icon on Plank:
mv showdesktop.dockitem ~/.config/plank/dock1/launchers/
Result:
