19 shortcuts for Gnome for Linux

Linux	Description Edit Cancel Save & submit
Alt+F1	Open the programs menu
Alt+F2	Open the 'Run Application' menu
Alt+F3	Focus the Deskbar dialog (if installed)
Shift+F10	Open the context menu for the selected item
printscreen	Take a screenshot
Alt+printscreen	Take a screenshot of the current window
Ctrl+Alt+Backspace	Restart the X windows server. (Disabled by default in Ubuntu 9.04+. Here are the instructions on how to re-enable
Ctrl+Alt+L	Lock the screen
Ctrl+Alt+Delete	Show the shutdown menu

Linux	Description Edit Cancel Save & submit
Alt+Tab	Cycle through open windows
Alt+F4	Close current window
Alt+F5	Unmaximize current window (if maximized)
Alt+F7/Alt+drag	Move current window. Use mouse or arrow keys to move, then press any key or click the mouse to finish.
Alt+F8/Alt+middle click drag	Resize current window. Use mouse or arrow up/arrow down to resize, then press any key or click the mouse to finish.
Alt+F9	Minimize current window
Alt+F10	Maximize the current window
Alt+Space	Open the window menu.
Ctrl+Alt+D	Minimize all windows and show desktop
Ctrl+Alt+Arrow Keys	Move to the workspace in the specified direction

Alt+Tab

Cycle through open windows

Alt+F4

Close current window

Alt+F5

Unmaximize current window (if maximized)

Alt+F7/Alt+drag

Move current window. Use mouse or arrow keys to move, then press any key or click the mouse to finish.

Alt+F8/Alt+middle click drag

Resize current window. Use mouse or arrow up/arrow down to resize, then press any key or click the mouse to finish.

Alt+F9

Minimize current window