Screenshot of active window
Solution 1:
If you are running xfce, there is an entry in the FAQ:
"My desktop is so nice, I want to make a screenshot! How can I do that in Xfce?"
The answer mention xfce4-screenshooter http://goodies.xfce.org/projects/applications/xfce4-screenshooter (it can capture an active window too)
Solution 2:
I have solved the same problem in Xubuntu 13.04 in the following way:
- Open Settings Manager -> Keyboard.
- Choose Application Shortcuts tab.
- Select xfce4-screenshooter -w command and change the shortcut to Sys_Req (Press Print Screen button first and then any Alt button).