3.2.4 FTP digital code meaning 110 Restart the tag response. 120 Service is Ready for a long time. 125 Data Link Open, ready to transfer. 150 file status is normal, turn on the data connection port. 200 command execution is successful. 202 Command failed. 211 System status or system help response. The status of the 212 directory. The status of the 213 file. 214 Help the message. 215 Name System Types. 220 new online service. 221 The control connection of the service is closed and can be logged out. 225 Data connection is open, but no transmission action. 226 Turn off the data connection port, the requested file operation is successful. 227 Enter Passive Mode. 230 user login. 250 The requested file operation is completed. 257 shows the current path name. The 331 user name is correct and needs a password. 332 Require account information when logging in. 350 The operation of the request requires a command to enter. 421 Unable to provide services, close control links. 425 Unable to turn on the data link. 426 Close online, terminate the transmission. The operation of the 450 request is not executed. 451 Command Termination: There is a local error. 452 Unexpected command: The disk space is insufficient. 500 Format error, unrecognizable commands. 501 Parameter grammatical error. 502 Command failed. 503 Command order error. The parameters connected to the 504 command are incorrect. 530 is not logged in. 532 Storage file requires an account to log in. 550 Operation of the requested request. 551 The command is terminated, and the type is unknown. 552 Request file is terminated, and the storage bit overflows. 553 The command of the request is not executed, the name is incorrect
