ABOR
Syntax: ABOR
Aborts a file transfer currently in progress.
ACCT*
Syntax: ACCT account-info
This command is used to send account information on systems that require
it. Typically sent after a PASS command.
ALLO
Syntax: ALLO size R max-record-size
Allocates sufficient storage space to receive a file. If the maximum size
of a record also needs to be known, that is sent as a second numeric
parameter following a space, the capital letter "R", and another space.
APPE
Syntax: APPE remote-filename
Append data to the end of a file on the remote host. If the file does not
already exist, it is created. This command must be preceded by a
PORT or PASV command so that the
server knows where to receive data from.
CDUP
Syntax: CDUP
Makes the parent of the current directory be the current directory.
CWD
Syntax: CWD remote-directory
Makes the given directory be the current directory on the remote host.
DELE
Syntax: DELE remote-filename
Deletes the given file on the remote host.
HELP
Syntax: HELP command
If a command is given, returns help on that command; otherwise,
returns general help for the FTP server (usually a list of supported
commands).
LIST
Syntax: LIST remote-filespec
If remote-filespec refers to a file, sends information about that
file. If remote-filespec refers to a directory, sends information
about each file in that directory. remote-filespec defaults to the
current directory. This command must be preceded by a PORT
or PASV command.
MDTM
Syntax: MDTM remote-filename
Returns the last-modified time of the given file on the remote host in the
format "YYYYMMDDhhmmss": YYYY is the four-digit year, MM is the month from
01 to 12, DD is the day of the month from 01 to 31, hh is the hour from 00
to 23, mm is the minute from 00 to 59, and ss is the second from 00 to 59.
MKD
Syntax: MKD remote-directory
Creates the named directory on the remote host.
MODE
Syntax: MODE mode-character
Sets the transfer mode to one of:
- S - Stream
- B - Block
- C - Compressed
The default mode is Stream.
NLST
Syntax: NLST remote-directory
Returns a list of filenames in the given directory (defaulting to the
current directory), with no other information. Must be preceded by a
PORT or PASV command.
NOOP
Syntax: NOOP
Does nothing except return a response.
PASS
Syntax: PASS password
After sending the USER command, send this command to
complete the login process. (Note, however, that an ACCT
command may have to be used on some systems.)
PASV
Syntax: PASV
Tells the server to enter "passive mode". In passive mode, the server will
wait for the client to establish a connection with it rather than
attempting to connect to a client-specified port. The server will respond
with the address of the port it is listening on, with a message like:
227 Entering Passive Mode (a1,a2,a3,a4,p1,p2)
where a1.a2.a3.a4 is the IP address and p1*256+p2 is
the port number.
PORT
Syntax: PORT a1,a2,a3,a4,p1,p2
Specifies the host and port to which the server should connect for the
next file transfer. This is interpreted as IP address a1.a2.a3.a4,
port p1*256+p2.
PWD
Syntax: PWD
Returns the name of the current directory on the remote host.
QUIT
Syntax: QUIT
Terminates the command connection.
REIN*
Syntax: REIN
Reinitializes the command connection - cancels the current
user/password/account information. Should be followed by a
USER command for another login.
REST
Syntax: REST position
Sets the point at which a file transfer should start; useful for resuming
interrupted transfers. For nonstructured files, this is simply a decimal
number. This command must immediately precede a data transfer command (RETR
or STOR only); i.e. it must come after any
PORT or PASV command.
RETR
Syntax: RETR remote-filename
Begins transmission of a file from the remote host. Must be preceded by
either a PORT command or a PASV
command to indicate where the server should send data.
RMD
Syntax: RMD remote-directory
Deletes the named directory on the remote host.
RNFR
Syntax: RNFR from-filename
Used when renaming a file. Use this command to specify the file to be
renamed; follow it with an RNTO command to specify the
new name for the file.
RNTO
Syntax: RNTO to-filename
Used when renaming a file. After sending an RNFR
command to specify the file to rename, send this command to specify the
new name for the file.
SITE*
Syntax: SITE site-specific-command
Executes a site-specific command.
SIZE
Syntax: SIZE remote-filename
Returns the size of the remote file as a decimal number.
STAT
Syntax: STAT remote-filespec
If invoked without parameters, returns general status information about
the FTP server process. If a parameter is given, acts like the
LIST command, except that data is sent over the
control connection (no PORT or PASV
command is required).
STOR
Syntax: STOR remote-filename
Begins transmission of a file to the remote site. Must be preceded by
either a PORT command or a PASV
command so the server knows where to accept data from.
STOU
Syntax: STOU
Begins transmission of a file to the remote site; the remote filename will
be unique in the current directory. The response from the server will
include the filename.
STRU
Syntax: STRU structure-character
Sets the file structure for transfer to one of:
- F - File (no structure)
- R - Record structure
- P - Page structure
The default structure is File.
SYST
Syntax: SYST
Returns a word identifying the system, the word "Type:", and the default
transfer type (as would be set by the TYPE command).
For example: UNIX Type: L8
TYPE
Syntax: TYPE type-character second-type-character
Sets the type of file to be transferred. type-character can be
any of:
- A - ASCII text
- E - EBCDIC text
- I - image (binary data)
- L - local format
For A and E, the second-type-character specifies how the text
should be interpreted. It can be:
- N - Non-print (not destined for printing). This is the default if
second-type-character is omitted.
- T - Telnet format control (<CR>, <FF>, etc.)
- C - ASA Carriage Control
For L, the second-type-character specifies the number of bits
per byte on the local system, and may not be omitted.
USER
Syntax: USER username
Send this command to begin the login process. username should be a
valid username on the system, or "anonymous" to initiate an anonymous
login.