Depending on window managers you use, keyboard shortcuts will wary. We’ll take a look at the some ways to capture screen-shots on gnome,kde.
For gnome:
1. You can use gnome-screenshot.
2. You can use printscrn as well and paste the clipboard image in GIMP.
3. Use screen-shooter
4. fbshot
5. Electric eyes
For KDE
1. You can invoke KSnapshot by going to the K menu and choosing Graphics > KSnapshot or pressing Alt-F2 and typing ksnapshot.
2. You can use printscrn as well and paste the clipboard image in GIMP.
You can use software like shutter for screen capture on any window manager. It comes with lot of features that you can find very handy.
