Ubuntu unity
From IThelp
The following text may serve as a succint navigation guide for Ubuntu 12.04 LTS and later versions. The user interface for Ubuntu 12.04 LTS is called unity; any windows users may feel more comfortable referring to it as a desktop.
Unity Dash
![](/images/thumb/6/68/Unity_Shortcuts.png/400px-Unity_Shortcuts.png)
Press "Alt" to open the HUD (Head-Up Display)