A screenshot, I mean.
The easiest thing to do in Ubuntu: to take screen-shots/screen captures. You don't need any graphic application or accessory program. just press 'Print Screen' key and save the image wherever you like. The result is outstanding. Let's see:
[click the image to view the full size]
As you can easily see, my Ubuntu is a little Mac-OS X look-alike. That's another the good news: your Ubuntu can look like whatever you want.