A complete list of Ubuntu Keyboard Shortcuts can be found at the Ubuntu Official Documentation KeyboardShortcuts resource and information on the Super Key.
desktop shortcuts
- Alt + F1 - Open the Applications menu
- Alt + F2 - Run an application by typing its name in the box which appears
- Prt Sc - (Print Screen) Take a screenshot of the whole screen
- Alt + Prt Sc - Take a screenshot of the current window
Window shortcuts
- Alt - Tab
- Ctrl - Alt - tab
- Ctrl + Alt + Left/Right Cursor