that's kind of vague....can you give more details?
However, bash-scripting might do what you need it to do, or perl or python...(google any of these terms and you'll get plenty of info)
As for what you need it for, you have 2 choices really, learn one of the above and make a script (or program) for yourself or you can see if someone can do it for you if you ask nicely
(personally I'd recommend learning...its always good to stretch your abilities and plus you can make something that exactly fits your needs rather than relying on someone else to do it for you...but that just me)