title: CURL - add content to an existing file using one request
body: <p>after searching info about curl on google , I think it's not possible, but I'll ask anyway:</p>
  
  <p>Is is possible to add content to a file using curl without changing its original content (using only one curl request!).</p>
  
  <p>For instance, I have a simple txt file:
  "hello this is test"</p>
  
  <p>and I would want to add another line to the file:
  "hello this is test
   and I have a second line!"</p>
  
  <p>currently my curl looks like this (it overwrite my file):</p>
  
  <pre><code>curl THE_FTP_ADRESS -X PUT -1 -v --disable-epsv --ftp-skip-pasv-ip --ftp-ssl-ccc -u MYUSR:PASS --upload-file MY_FILE_ADRESS
  </code></pre>
  
  <p>I think it's possible to fetch the file from the ftp server, then add up the part I want to add and overwrite it on the ftp server, but I want to know if there's a simpler way to do this.</p>