title: How to get PDF Version with ghostscript (GS) on Linux
body: <p>I can change the PDF version with:</p>
  
  <pre><code> gs -sDEVICE=pdfwrite -dCompatibilityLevel=1.4 -dPDFSETTINGS=/screen -dNOPAUSE -dQUIET -dBATCH -sOutputFile=output.pdf input.pdf
  </code></pre>
  
  <p>How I can get the original PDF version of input.pdf using gs?</p>