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# 2. Opening a Terminal

Since the Unix tutorial is all about typing commands at a terminal command prompt, it is of course necessary to be able to open a terminal window. Terminal icons often look like rounded squares, like small monitor images.

## 2.1. Linux Systems

> On newer systems, one might get to the terminal by:

>     drag mouse to upper left corner ... wait a bit ... click on screen image

> On older systems, there is often a Terminal application under:

>     Applications ... System Tools ... Terminal

## 2.2. OS X Terminals

XQuartz may be the prefered application to start, but new systems do not necesarrily come with it. In such a case, trying to start afni from a (non-XQuartz) terminal will result in the user being prompted to install XQuartz. That may be the most simple way to install it.

Otherwise (and to find the non-XQuartz Terminal application):

> Use Finder to open the /Applications directory, then enter Utilities, and finally look for XQuartz (or Terminal or X11 on an older system).:

>     Applications -> Utilities -> XQuartz
>     Applications -> Utilities -> X11
>     Applications -> Utilities -> Terminal

> It is usually convenient to drag the desired program to the dock, since (hopefully) it will be used more often than iTunes, say...

> Start X11 (or XQuartz or Terminal), and from the application bar at the top of the screen, choose:

>     Applications (from X11 menu bar) -> Terminal

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