Open RAW (.cr2) images with Gimp

I have a Canon 400D, and today i tried to take some pictures and experiment some HDR effects on them. I took some pictures in RAW mode, with -2EV, 0EV and +2EV. Uploaded it to PC and boom! Gimp (or any other program) can't open CR2 files...

How to open *.cr2 files at Linux? Simple: install ufraw:
sudo apt-get install ufraw gimp-ufraw

Now, open ufraw (press ALT+F2 and type ufraw) and load the cr2 image. Then in the right bottom click at the Gimp button. Gimp will be launched and loads you image.

If you're interred on HDR effects, try qtpfsgui.