ftp man page
ftp — Internet file transfer program
Connect to an FTP server:
Switch to binary transfer mode (graphics, compressed files, etc):
Transfer multiple files without prompting for confirmation on every file:
Download multiple files (glob expression):
Upload multiple files (glob expression):
Delete multiple files on the remote server:
Rename a file on the remote server:
rename original_filename new_filename
Ftp is the user interface to the Internet standard File Transfer Protocol. The program allows a user to transfer files to and from a remote network site.
Options may be specified at the command line, or to the command interpreter.
Use active mode for data transfers. This is useful for transmissions to servers which do not support passive connections (for whatever reason.)
Use passive mode for data transfers. Allows use of ftp in environments where a firewall prevents connections from the outside world back to the client machine. Requires that the ftp server support the PASV command. This is the default now for all clients (ftp and pftp) due to security concerns using the PORT transfer mode. The flag is kept for compatibility only and has no effect anymore.
Turns off interactive prompting during multiple file transfers.
Restrains ftp from attempting “auto-login” upon initial connection. If auto-login is enabled, ftp will check the
.netrc(see netrc(5)) file in the user's home directory for an entry describing an account on the remote machine. If no entry exists, ftp will prompt for the remote machine login name (default is the user identity on the local machine), and, if necessary, prompt for a password and an account with which to login.
Disables command editing and history support, if it was compiled into the ftp executable. Otherwise, does nothing.
Disables file name globbing.
The default requires that ftp explicitly binds to the same interface for the data channel as the control channel in passive mode. Useful on multi-homed clients. This option disables this behavior.
Verbose option forces ftp to show all responses from the remote server, as well as report on data transfer statistics.
The client host with which ftp is to communicate may be specified on the command line. If this is done, ftp will immediately attempt to establish a connection to an FTP server on that host; otherwise, ftp will enter its command interpreter and await instructions from the user. When ftp is awaiting commands from the user the prompt ‘
ftp>’ is provided to the user. The following commands are recognized by ftp:
Invoke an interactive shell on the local machine. If there are arguments, the first is taken to be a command to execute directly, with the rest of the arguments as its arguments.
Execute the macro macro-name that was defined with the
macdefcommand. Arguments are passed to the macro unglobbed.
Supply a supplemental password required by a remote system for access to resources once a login has been successfully completed. If no argument is included, the user will be prompted for an account password in a non-echoing input mode.
Append a local file to a file on the remote machine. If remote-file is left unspecified, the local file name is used in naming the remote file after being altered by any
nmapsetting. File transfer uses the current settings for
Set the file transfer
typeto network ASCII. This is the default type.
Arrange that a bell be sounded after each file transfer command is completed.
Set the file transfer
typeto support binary image transfer.
Terminate the FTP session with the remote server and exit ftp. An end of file will also terminate the session and exit.
Toggle remote computer file name case mapping during
caseis on (default is off), remote computer file names with all letters in upper case are written in the local directory with the letters mapped to lower case.
Change the working directory on the remote machine to remote-directory.
Change the remote machine working directory to the parent of the current remote machine working directory.
Change the permission modes of the file file-name on the remote system to mode.
Terminate the FTP session with the remote server, and return to the command interpreter. Any defined macros are erased.
Toggle carriage return stripping during ascii type file retrieval. Records are denoted by a carriage return/linefeed sequence during ascii type file transfer. When
cris on (the default), carriage returns are stripped from this sequence to conform with the UNIX single linefeed record delimiter. Records on non-UNIX remote systems may contain single linefeeds; when an ascii type transfer is made, these linefeeds may be distinguished from a record delimiter only when
Delete the file remote-file on the remote machine.
Toggle debugging mode. If an optional debug-value is specified it is used to set the debugging level. When debugging is on, ftp prints each command sent to the remote machine, preceded by the string ‘
Print a listing of the directory contents in the directory, remote-directory, and, optionally, placing the output in local-file. If interactive prompting is on, ftp will prompt the user to verify that the last argument is indeed the target local file for receiving
diroutput. If no directory is specified, the current working directory on the remote machine is used. If no local file is specified, or local-file is
-, output comes to the terminal.
A synonym for close.
Set the file transfer
formto format. The default format is “file”.
Retrieve the remote-file and store it on the local machine. If the local file name is not specified, it is given the same name it has on the remote machine, subject to alteration by the current
nmapsettings. The current settings for
structureare used while transferring the file.
Toggle filename expansion for
mput. If globbing is turned off with
glob, the file name arguments are taken literally and not expanded. Globbing for
mputis done as in csh(1). For
mget, each remote file name is expanded separately on the remote machine and the lists are not merged. Expansion of a directory name is likely to be different from expansion of the name of an ordinary file: the exact result depends on the foreign operating system and ftp server, and can be previewed by doing ‘
mls remote-files -’ Note:
mputare not meant to transfer entire directory subtrees of files. That can be done by transferring a tar(1) archive of the subtree (in binary mode).
Toggle hash-sign (``#'') printing for each data block transferred. The size of a data block is 1024 bytes.
Print an informative message about the meaning of command. If no argument is given, ftp prints a list of the known commands.
Set the inactivity timer on the remote server to seconds seconds. If seconds is omitted, the current inactivity timer is printed.
Change the working directory on the local machine. If no directory is specified, the user's home directory is used.
Print a listing of the contents of a directory on the remote machine. The listing includes any system-dependent information that the server chooses to include; for example, most UNIX systems will produce output from the command ‘
ls -l’. (See also
nlist.) If remote-directory is left unspecified, the current working directory is used. If interactive prompting is on, ftp will prompt the user to verify that the last argument is indeed the target local file for receiving
lsoutput. If no local file is specified, or if local-file is ‘
-’, the output is sent to the terminal.
Define a macro. Subsequent lines are stored as the macro macro-name; a null line (consecutive newline characters in a file or carriage returns from the terminal) terminates macro input mode. There is a limit of 16 macros and 4096 total characters in all defined macros. Macros remain defined until a
closecommand is executed. The macro processor interprets `$' and `\' as special characters. A `$' followed by a number (or numbers) is replaced by the corresponding argument on the macro invocation command line. A `$' followed by an `i' signals that macro processor that the executing macro is to be looped. On the first pass `$i' is replaced by the first argument on the macro invocation command line, on the second pass it is replaced by the second argument, and so on. A `\' followed by any character is replaced by that character. Use the `\' to prevent special treatment of the `$'.
Delete the remote-files on the remote machine.
dir, except multiple remote files may be specified. If interactive prompting is on, ftp will prompt the user to verify that the last argument is indeed the target local file for receiving
Expand the remote-files on the remote machine and do a
getfor each file name thus produced. See
globfor details on the filename expansion. Resulting file names will then be processed according to
nmapsettings. Files are transferred into the local working directory, which can be changed with ‘
lcd directory’; new local directories can be created with ‘
! mkdir directory’.
Make a directory on the remote machine.
nlist, except multiple remote files may be specified, and the local-file must be specified. If interactive prompting is on, ftp will prompt the user to verify that the last argument is indeed the target local file for receiving
Set the file transfer
modeto mode-name. The default mode is “stream” mode.
Show the last modification time of the file on the remote machine.
Expand wild cards in the list of local files given as arguments and do a
putfor each file in the resulting list. See
globfor details of filename expansion. Resulting file names will then be processed according to
Get the file only if the modification time of the remote file is more recent that the file on the current system. If the file does not exist on the current system, the remote file is considered
newer. Otherwise, this command is identical to get.
Print a list of the files in a directory on the remote machine. If remote-directory is left unspecified, the current working directory is used. If interactive prompting is on, ftp will prompt the user to verify that the last argument is indeed the target local file for receiving
nlistoutput. If no local file is specified, or if local-file is
-, the output is sent to the terminal.
Set or unset the filename mapping mechanism. If no arguments are specified, the filename mapping mechanism is unset. If arguments are specified, remote filenames are mapped during
putcommands issued without a specified remote target filename. If arguments are specified, local filenames are mapped during
getcommands issued without a specified local target filename. This command is useful when connecting to a non-UNIX remote computer with different file naming conventions or practices. The mapping follows the pattern set by inpattern and outpattern. [Inpattern] is a template for incoming filenames (which may have already been processed according to the
casesettings). Variable templating is accomplished by including the sequences `$1', `$2', ..., `$9' in inpattern. Use `\' to prevent this special treatment of the `$' character. All other characters are treated literally, and are used to determine the
nmap[inpattern] variable values. For example, given inpattern $1.$2 and the remote file name "mydata.data", $1 would have the value "mydata", and $2 would have the value "data". The outpattern determines the resulting mapped filename. The sequences `$1', `$2', ...., `$9' are replaced by any value resulting from the inpattern template. The sequence `$0' is replace by the original filename. Additionally, the sequence ‘
[seq1, seq2]’ is replaced by [seq1] if seq1 is not a null string; otherwise it is replaced by seq2. For example, the command
nmap $1.$2.$3 [$1,$2].[$2,file]
would yield the output filename "myfile.data" for input filenames "myfile.data" and "myfile.data.old", "myfile.file" for the input filename "myfile", and "myfile.myfile" for the input filename ".myfile". Spaces may be included in outpattern, as in the example: `nmap $1 sed "s/ *$//" > $1' . Use the `\' character to prevent special treatment of the `$','[','[', and `,' characters.
Set or unset the filename character translation mechanism. If no arguments are specified, the filename character translation mechanism is unset. If arguments are specified, characters in remote filenames are translated during
putcommands issued without a specified remote target filename. If arguments are specified, characters in local filenames are translated during
getcommands issued without a specified local target filename. This command is useful when connecting to a non-UNIX remote computer with different file naming conventions or practices. Characters in a filename matching a character in inchars are replaced with the corresponding character in outchars. If the character's position in inchars is longer than the length of outchars, the character is deleted from the file name.
Establish a connection to the specified host FTP server. An optional port number may be supplied, in which case, ftp will attempt to contact an FTP server at that port. If the
auto-loginoption is on (default), ftp will also attempt to automatically log the user in to the FTP server (see below).
Toggle interactive prompting. Interactive prompting occurs during multiple file transfers to allow the user to selectively retrieve or store files. If prompting is turned off (default is on), any
mputwill transfer all files, and any
mdeletewill delete all files.
Execute an ftp command on a secondary control connection. This command allows simultaneous connection to two remote ftp servers for transferring files between the two servers. The first
proxycommand should be an
open, to establish the secondary control connection. Enter the command "proxy ?" to see other ftp commands executable on the secondary connection. The following commands behave differently when prefaced by
openwill not define new macros during the auto-login process,
closewill not erase existing macro definitions,
mgettransfer files from the host on the primary control connection to the host on the secondary control connection, and
appendtransfer files from the host on the secondary control connection to the host on the primary control connection. Third party file transfers depend upon support of the ftp protocol
PASVcommand by the server on the secondary control connection.
Store a local file on the remote machine. If remote-file is left unspecified, the local file name is used after processing according to any
nmapsettings in naming the remote file. File transfer uses the current settings for
Print the name of the current working directory on the remote machine.
A synonym for
quotearg1 arg2 ...
The arguments specified are sent, verbatim, to the remote FTP server.
A synonym for get.
Reget acts like get, except that if local-file exists and is smaller than remote-file, local-file is presumed to be a partially transferred copy of remote-file and the transfer is continued from the apparent point of failure. This command is useful when transferring very large files over networks that are prone to dropping connections.
Request help from the remote FTP server. If a command-name is specified it is supplied to the server as well.
With no arguments, show status of remote machine. If file-name is specified, show status of file-name on remote machine.
Rename the file from on the remote machine, to the file to.
Clear reply queue. This command re-synchronizes command/reply sequencing with the remote ftp server. Resynchronization may be necessary following a violation of the ftp protocol by the remote server.
Restart the immediately following
putat the indicated marker. On UNIX systems, marker is usually a byte offset into the file.
Delete a directory on the remote machine.
Toggle storing of files on the local system with unique filenames. If a file already exists with a name equal to the target local filename for a
mgetcommand, a ".1" is appended to the name. If the resulting name matches another existing file, a ".2" is appended to the original name. If this process continues up to ".99", an error message is printed, and the transfer does not take place. The generated unique filename will be reported. Note that
runiquewill not affect local files generated from a shell command (see below). The default value is off.
A synonym for put.
Toggle the use of
PORTcommands. By default, ftp will attempt to use a
PORTcommand when establishing a connection for each data transfer. The use of
PORTcommands can prevent delays when performing multiple file transfers. If the
PORTcommand fails, ftp will use the default data port. When the use of
PORTcommands is disabled, no attempt will be made to use
PORTcommands for each data transfer. This is useful for certain FTP implementations which do ignore
PORTcommands but, incorrectly, indicate they've been accepted.
sitearg1 arg2 ...
The arguments specified are sent, verbatim, to the remote FTP server as a
Return size of file-name on remote machine.
Show the current status of ftp.
Set the file transfer structure to struct-name. By default “stream” structure is used.
Toggle storing of files on remote machine under unique file names. Remote ftp server must support ftp protocol
STOUcommand for successful completion. The remote server will report unique name. Default value is off.
Show the type of operating system running on the remote machine.
Set the file transfer type to that needed to talk to TENEX machines.
Toggle packet tracing.
Set the file transfer
typeto type-name. If no type is specified, the current type is printed. The default type is network ASCII.
Set the default umask on the remote server to newmask. If newmask is omitted, the current umask is printed.
useruser-name [password] [account]
Identify yourself to the remote FTP server. If the password is not specified and the server requires it, ftp will prompt the user for it (after disabling local echo). If an account field is not specified, and the FTP server requires it, the user will be prompted for it. If an account field is specified, an account command will be relayed to the remote server after the login sequence is completed if the remote server did not require it for logging in. Unless ftp is invoked with “auto-login” disabled, this process is done automatically on initial connection to the FTP server.
Toggle verbose mode. In verbose mode, all responses from the FTP server are displayed to the user. In addition, if verbose is on, when a file transfer completes, statistics regarding the efficiency of the transfer are reported. By default, verbose is on.
- ? [command]
A synonym for help.
Command arguments which have embedded spaces may be quoted with quote `"' marks.
Aborting a File Transfer
To abort a file transfer, use the terminal interrupt key (usually Ctrl-C). Sending transfers will be immediately halted. Receiving transfers will be halted by sending a ftp protocol
ABOR command to the remote server, and discarding any further data received. The speed at which this is accomplished depends upon the remote server's support for
ABOR processing. If the remote server does not support the
ABOR command, an ‘
ftp>’ prompt will not appear until the remote server has completed sending the requested file.
The terminal interrupt key sequence will be ignored when ftp has completed any local processing and is awaiting a reply from the remote server. A long delay in this mode may result from the ABOR processing described above, or from unexpected behavior by the remote server, including violations of the ftp protocol. If the delay results from unexpected remote server behavior, the local ftp program must be killed by hand.
File Naming Conventions
Files specified as arguments to ftp commands are processed according to the following rules.
If the file name ‘
-’ is specified, the stdin (for reading) or stdout (for writing) is used.
If the first character of the file name is ‘|’, the remainder of the argument is interpreted as a shell command. Ftp then forks a shell, using popen(3) with the argument supplied, and reads (writes) from the stdout (stdin). If the shell command includes spaces, the argument must be quoted; e.g. “" ls -lt"”. A particularly useful example of this mechanism is: “dir more”.
Failing the above checks, if ``globbing'' is enabled, local file names are expanded according to the rules used in the csh(1); c.f. the
globcommand. If the ftp command expects a single local file (.e.g.
put), only the first filename generated by the "globbing" operation is used.
getcommands with unspecified local file names, the local filename is the remote filename, which may be altered by a
nmapsetting. The resulting filename may then be altered if
putcommands with unspecified remote file names, the remote filename is the local filename, which may be altered by a
nmapsetting. The resulting filename may then be altered by the remote server if
File Transfer Parameters
The FTP specification specifies many parameters which may affect a file transfer. The
type may be one of “ascii”, “image” (binary), “ebcdic”, and “local byte size” (for PDP-10's and PDP-20's mostly). Ftp supports the ascii and image types of file transfer, plus local byte size 8 for
tenex mode transfers.
Ftp supports only the default values for the remaining file transfer parameters:
Ftp utilizes the following environment variables.
For default location of a
.netrcfile, if one exists.
For default shell.
ftpd(8), RFC 959
The ftp command appeared in 4.2BSD.
Correct execution of many commands depends upon proper behavior by the remote server.
An error in the treatment of carriage returns in the 4.2BSD ascii-mode transfer code has been corrected. This correction may result in incorrect transfers of binary files to and from 4.2BSD servers using the ascii type. Avoid this problem by using the binary image type.
bup-ftp(1), cadaver(1), curl(1), fetchmail(1), ftpcount(1), ftpdctl(8), ftpscrub(8), ftpshut(8), ftptop(1), ftpwho(1), kerberos(8), lftp(1), lynx(1), mpop(1), msmtp(1), ncftp(1), ncftpget(1), ncftpls(1), ncftpput(1), netrc(5), ping(8), proftpd(8), pure-authd(8), pure-ftpd(8), pure-ftpwho(8), pure-mrtginfo(8), pure-pw(8), pure-pwconvert(8), pure-quotacheck(8), pure-statsdecode(8), pure-uploadscript(8), rcp(1), rexec(1), sftp(1), smbclient(1), uberftp(1), webcam(1), zshzftpsys(1).