FTP Command Reference
Look up any FTP protocol command — syntax, description, and common usage. Covers standard RFC 959 commands and widely-supported extensions.
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About FTP commands
FTP commands are sent by the client to the server over the control connection (port 21 by default). The server responds with a 3-digit status code. The core protocol is defined in RFC 959, with extensions defined in RFCs 2228, 2389, 2640, 3659, and 4217.
Looking for what server response codes mean? Check the FTP Response Code Lookup tool.