title: applying the same command to multiple files in multiple subdirectories
body: <p>I have a directory with 94 subdirectories, each containing one or two files <code>*.fastq</code>. I need to apply the same python command to each of these files and produce a new file <code>qc_*.fastq</code>.</p>
  
  <p>I know how to apply a bash script individually to each file, but I'm wondering if there is a way to write a bash script to apply the command to all the files at once</p>