110 : Restart marker reply. In this case, the text is exact and not left to the particular implementation; it must read: MARK yyyy = mmmm where yyyy is User-process data stream marker, and mmmm server’s equivalent marker (note the spaces between markers and “=”).

120 : Service ready in nnn minutes.

125:  Data connection already open; transfer starting.

150:  File status okay; about to open data connection.

200:  Command okay.

202:  Command not implemented, superfluous at this site.

211:  System status, or system help reply.

212 irectory status.

213 : File status.

214 : Help message.On how to use the server or the meaning of a particular non-standard command. This reply is useful only to the human user.

215 : NAME system type. Where NAME is an official system name from the list in the Assigned Numbers document.

220 : Service ready for new user.

221 : Service closing control connection.

225 : Data connection open; no transfer in progress.

226 : Closing data connection. Requested file action successful (for example, file transfer or file abort).

227 : Entering Passive Mode (h1,h2,h3,h4,p1,p2).

230 : User logged in, proceed. Logged out if appropriate.

250 : Requested file action okay, completed.

257 : “PATHNAME” created.

331 : User name okay, need password.

332 : Need account for login.

350 : Requested file action pending further information

421 : Service not available, closing control connection.This may be a reply to any command if the service knows it must shut down.

425 : Can’t open data connection.

426 : Connection closed; transfer aborted.

450 : Requested file action not taken.

451 : Requested action aborted. Local error in processing.

452 : Requested action not taken. Insufficient storage space in system.File unavailable (e.g., file busy).

500 : Syntax error, command unrecognized. This may include errors such as command line too long.

501 : Syntax error in parameters or arguments.

502 : Command not implemented.

503 : Bad sequence of commands.

504 : Command not implemented for that parameter.

530 : Not logged in.

532 : Need account for storing files.

550 : Requested action not taken. File unavailable (e.g., file not found, no access).

551 : Requested action aborted. Page type unknown.

552 : Requested file action aborted. Exceeded storage allocation (for current directory or dataset).

553 : Requested action not taken. File name not allowed.

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