FTP
502 Command Not Implemented
Command not implemented. The server recognizes the command but does not support it in its current configuration.
Khi bạn thấy mã này
When you use a valid FTP command that this particular server has not implemented, such as SITE or SMNT.
Cách khắc phục
Use an alternative command or approach. Check the server's FEAT response or HELP output to see which commands are actually supported.