title: Drop database return "Error dropping database errno: 66" in MySQL
body: <p>Consider:</p>
  
  <pre><code>DROP DATABASE db_name;
  ERROR 1010 (HY000): Error dropping database (can't rmdir './db_name', errno: 66)
  </code></pre>
  
  <p>The problem is that I don't know where the file/directory is located - this file is missing in <strong>/usr/local/mysql/bin/</strong>...</p>
  
  <p>How do I fix this issue?</p>