title: How to split a file and keep the first line in each of the pieces?
body: <p><strong>Given:</strong> One big text-data file (e.g. CSV format) with a 'special' first line (e.g., field names).</p>
  
  <p><strong>Wanted:</strong> An equivalent of the coreutils <code>split -l</code> command, but with the additional requirement that the header line from the original file appear at the beginning of each of the resulting pieces.</p>
  
  <p>I am guessing some concoction of <code>split</code> and <code>head</code> will do the trick?</p>