In fact, for lnmp, you can use SFTP instead of FTP. However, Good VPS always feels that although SFTP is safe for transmission, the speed is really not complimentable. Anyway, I feel it is much slower than FTP ( I mean on the same VPS), so I also set up an FTP to transfer files.
First, of course, SSH to our VPS. (Tip: The establishment of FTP can be executed immediately after the lnmp one-click installation package is completed~)