FTP command and response code explanation

FTP command

 

Command	Description
Abor	Interrupt Data Connection Program
Acct <account>	System privileged account
Allo <bytes>	Allocate bytes to the file storage on the server
Appe <FILENAME>	Add a file to a file with the same name on the server
Cdup <dir path>	Change the parent directory on the server
CWD <dir path>	Change the working directory on the server
Dele <FILENAME>	Deletes a specified file on the server.
Help <command>	Returns the specified command information.
List <Name>	If the file name is used to list file information, if the file name is a directory, the file list is listed.
Mode <mode>	Transmission Mode (S = stream mode, B = block mode, c = compression mode)
MKD <directory>	Create a specified directory on the server
NLST <directory>	List contents of a specified directory
Noop	No action, except for the recognition from the server
Pass <password>	System logon Password
PASV	Request the server to wait for Data Connection
Port <address>	IP address and two-byte port ID
PWD	Display current working directory
Quit	Log out from the FTP server
Rein	Reinitialize the logon status connection
Rest <OFFSET>	Restart file transmission at a specific offset
RETR <FILENAME>	Retrieve (copy) files from the server
RMD <directory>	Delete a specified directory on the server
RNFR <old path>	Rename the old path
RNTO <New Path>	Rename a new path
Site <Params>	Special site parameters provided by the server
SMNT <pathname>	Mount the specified file structure
Stat <directory>	Returns information in the current program or directory.
Stor <FILENAME>	Store (copy) the file to the server
STOU <FILENAME>	Store the file to the server name
Stru <type>	Data structure (F = file, r = record, P = page)
Syst	Back to the operating system used by the server
Type <data type>	Data Type (A = ASCII, E = ebcdic, I = binary)
User <username>	User name for system Logon

 

FTP Response Code

 

Response Code	Description
110	Restart flag on the new file indicator
120	Time when the server is ready (in minutes)
125	Open Data Connection and start transmission
150	Open connection
200	Successful
202	Command not executed
211	System status reply
212	Directory status reply
213	File status reply
214	Reply to help information
215	System type reply
220	Service ready
221	Exit Network
225	Open Data Connection
226	End data connection
227	Enter passive mode (IP address, Id port)
230	Log on to the Internet
250	File behavior completed
257	Path Name Creation
331	Password required
332	Account required
350	File Suspension
421	Service closed
425	Unable to open data connection
426	End connection
450	File unavailable
451	Local Error
452	Insufficient disk space
500	Invalid Command
501	Error parameter
502	Command not executed
503	Error command sequence
504	Invalid Command Parameters
530	Network not logged on
532	An account is required to store files.
550	File unavailable
551	Unknown page type
552	Storage Allocation exceeded
553	File Name Not Allowed