title: Recursively find all files containing 'string.txt' in file name
body: <p>I want to recursively search for all files and sub-directories within a directory with sub string within file name as 'string.txt'</p>
  
  <p>My command:</p>
  
  <pre><code>   cd /home/abcd/dir
     grep -R "*rate-trace.txt" | wc -l
  </code></pre>