Maybe you could start by looking at those links.
I like this really short tutorial on how to do some simple bash scripting. This may help getting you started or explaining a few simple concepts differently than the other post.
Here's another more extensive tutorial for beginners: http://linuxconfig.org/bash-scripting-tutorial
A quick guide: http://www.panix.com/~elflord/unix/bash-tute.html
Slightly more extensive beginners handbook on shell/bash: http://www.freeos.com/guides/lsst/
If you're not familiar with the command line then a good place to start is:
Then head on over to:
for a more thorough look at scripting.