Tutorial for GRASS

[Casey Claiborne]

Hello,
        I have just installed GRASS on my Linux system; however, I do not 
know how to use it (which is frustrating). I have downloaded the programmers 
manual and the reference manual and have gone through them - a 300 page 
listing of *all* of the commands that are available in GRASS does not 
exactly show me how to use the product. I do not wish to spend a good 
portion of the day trying to get a command to work only to find that other 
commands must be called first to do some initialization processing.  I once 
ran a shell program that displays the GRASS logo. I then tried to do a zoom 
on a specific area. The program then told me to use the "d.erase" command to 
get an updated image. The screen turned black and I, in no way shape or 
form, did I receive an updated image. Evidently I am missing something - 
however - I am at a loss as to what. 
        Someone informed me of a XUsersGuide.ps on the net. I downloaded 
this but it appears to be useful for something called "XGrass" (which I have 
not been successful in finding). Where can this be located? If there is 
*not* any sort of tutorial document, what other sources can I consult to 
learn how to use Grass?

I only want to do the following.
        1) Bring up an image map that I have placed in the GRASS database
        2) Zoom in on a certain spot on the map.
        3 Save the zoomed image to a file.

I have had the GRASS product for a little over a week now; but , as I have 
mentioned earlier, I am unable to use it.

If *anyone* knows of a useful tutorial or any other source that I can use, I 
would appreciate any information on it.

Thanks in advance

Casey


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