title: How to find nested directories?
body: <p>I have directory tree like:</p>
  
  <pre><code>dir11/dir21/dir31......./dirn1
  dir12/dir22/dir32......./dirn2
  dir13/dir23/dir33......./dirn3
  </code></pre>
  
  <p>Depths are different. Does it possible find all paths on which exists directory with file x.txt that has length>0 ? May be need use bash script?
  Thanks.</p>