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

"How do I write ruby" is a little beyond the scope of SO.

But to turn these ruby scripts into executable scripts, put this as the first line of your ruby script:

#!/path/to/ruby

Then make the file executable:

chmod a+x myscript.rb

and away you go.