title: How do escape echo " for storing in a file?
body: <p>I know : <code>echo "blah blah" &gt;file.txt</code> works.
  and that <code>echo "" &gt;file.txt</code> works too.</p>
  
  <p>but, what if I want to echo only ONE <code>"</code> (double quote) in a file.</p>
  
  <p><code>echo "&gt;file.txt</code> doesn't work, is it possible doing it in a one line command?</p>