This post shows you how to create some useful extra keyboard-shortcuts.
Ctrl+Alt+Del to open system monitor
In GNOME (the version of DE in my computer), open System settings –> Keyboard, in tab shortcut –> Custom shortcuts, click add button, a new window shows up, in the command box, you type: gnome-system-monitor
Ok, system will ask you to assign a shortcut to this command. It’s your choice. (I prefer Ctrl+Alt+Del as in Window).
Xkill to kill a window
Repeat the steps above, but in the command box, you type xkill
You can create your own keyboard-shortcuts this way as long as you know much about gnome system commands.
Hope this helps.
N. Huy (st)
Source: howtogeek.com
Ya,you mentioned it with twist.
http://www.howtoflash.com/