"For reference, I kept a comprehensive list of keyboard
shortcuts specifically for the GNOME desktop environment. I would
like to share this list to everyone, particularly those who are new
to Ubuntu or to any other GNOME-based distro.
"Now, let your fingers do the walking around your Linux
Global Keyboard Shortcuts
"Alt+F1 - Open the Applications Menu.
Alt+F2 - Display the Run Application dialog.
Print Screen - Take a screenshot of the entire desktop.
Alt+Print Screen - Take a screenshot of the currently focused
Ctrl+Alt+Arrow keys - Switch to the workspace to the specified
direction of the current workspace."