simple image processing without GIMP

I am using linux, an开发者_C百科d I want to do simple image processing.

Given an image (.jpg) I want to cut a small square portion of that and save it as mySmallSqaure.jpg.

Is there a simple way to do this without using GIMP? I only want this kind of process, so I was thinking using GIMP would be heavy considering that I am only cutting small portion.

Any lightweight software to do this?

http://www.imagemagick.org/script/index.php

If you want a command line tool, you can use the already mentioned ImageMagick, if you want a GUI, you could try xpaint, fspot and a lot of other tools, that will probably do the job. BTW, this seems for like a question for superuser.com

gThumb

sudo apt-get install gthumb