How do I use Ruby for shell scripting?

Question

I have some simple shell scripting tasks that I want to do

For example: Selecting a file in the working directory from a list of the files matching some regular e

Answer 1

This might also be helpful: http://rush.heroku.com/

I haven't used it much, but looks pretty cool

From the site:

rush is a replacement for the unix shell (bash, zsh, etc) which uses pure Ruby syntax. Grep through files, find and kill processes, copy files - everything you do in the shell, now in Ruby