|Ctrl-L||Cleans the screen|
|Ctrl-Y||Pastes back the stuff erased by Ctrl-K or Ctrl-U|
|Ctrl-C||Aborts a application|
|Ctrl-Z||Suspend a application. Resume it again by |
|Ctrl-D||is same as typing |
|Ctrl-R||Search terminal history|
Some of the shortcuts are also recognized by other applications, like Ctrl-U on Ubuntu’s graphical login screen.