ln -s  applications-engineering.png 	 applications-engineering-symbolic.png;
ln -s  applications-games.png 	 applications-games-symbolic.png;
ln -s  applications-graphics.png 	 applications-graphics-symbolic.png;
ln -s  applications-multimedia.png 	 applications-multimedia-symbolic.png;
ln -s  applications-science.png 	 applications-science-symbolic.png;
ln -s  applications-utilities.png 	 applications-utilities-symbolic.png;
ln -s  preferences-other.png 	 preferences-other-symbolic.png;
ln -s  preferences-system.png 	 preferences-system-symbolic.png;
ln -s  system-help.png 	 system-help-symbolic.png;
ln -s  slideshow.png 	 slideshow-symbolic.png;
ln -s  unity-slideshow.png 	 unity-slideshow-symbolic.png;