Getting started scripting

Hey,

I'd like to look into building some scripts to do some very basic server maintenance; however, I don't know exactly where to start.

Are there any scripting tutorials, websites, or books that anyone would recommend?

Thanks!
Cort

This one is quite good if you use bash as your shell :

http://www.linuxdoc.org/LDP/abs/html/index.html

Any for the posix shell ?

thanks

simon2000