title: Process files recursively using bash
body: <p>I currently have a small script that processes all files in a directory. I would like this to also recursively process all files in the subfolder. Any thoughts on how to do this?
  My current code is:</p>
  
  <pre><code>#!/bin/bash
  for file in ./input/*
  do
     do_something "$file"
  done
  </code></pre>