title: Bash ftp : put only newer files just like filezilla
body: <p>I can't believe I stuck there.</p>
  
  <p>I would like to <code>put</code> only newer files in a bash ftp script.</p>
  
  <p>Just like filezilla does:</p>
  
  <p><a href="https://i.stack.imgur.com/yaZJ3.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/yaZJ3.png" alt="enter image description here"></a></p>
  
  <p>I know it is possible with winscp, but I cannot believe this doesn't exist within the linux <code>ftp</code> command line tool.</p>
  
  <p>Important Note: I can't SSH the server, so please <strong>don't</strong> suggest rsync.</p>