title: Collect files from all subdirectories
body: <p>I have a directory with about 5,000 subdirectories in it.</p>
  
  <p>Each subdirectory contains one file each.</p>
  
  <p>I'd like to collect those files and put them in the same folder somewhere.</p>
  
  <p>Is there a way to do that by Mac OSX terminal command? Or should I write a, say, python script to do that?</p>