ftp(1) 맨 페이지 - 윈디하나의 솔라나라

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ftp(1)

Name
     ftp - file transfer program

Synopsis
     ftp [-adfginpstvx] [-m GSS Mech] [-T timeout]
          [hostname [port]]

Description
     The ftp command is the user interface to the Internet  stan-
     dard  File  Transfer  Protocol (FTP). ftp transfers files to
     and from a remote network site.


     The host and optional port with which ftp is to  communicate
     can  be  specified on the command line. If this is done, ftp
     immediately attempts to establish a  connection  to  an  FTP
     server  on  that  host.  Otherwise,  ftp  enters its command
     interpreter and awaits instructions from the user. When  ftp
     is  awaiting  commands from the user, it displays the prompt
     ftp>.

Options
     The following options can be specified at the command  line,
     or to the command interpreter:

     -a
                   Uses  GSSAPI  authentication  only.   If   the
                   authentication  fails,  this option closes the
                   connection.


     -d
                   Enables debugging.


     -f
                   Forwards local  security  credentials  to  the
                   remote server.


     -g
                   Disables filename "globbing".


     -i
                   Turns off interactive prompting during  multi-
                   ple file transfers.


     -m
                   Specifies the GSS-API mechanism  to  use.  The
                   default  is  to use the kerberos_v5 mechanism.
                   Supported   alternatives   are   defined    in
                   /etc/gss/mech (see mech(4)).

     -n
                   Does not  attempt  "auto-login"  upon  initial
                   connection. If auto-login is not disabled, ftp
                   checks the .netrc  file  in  the  user's  home
                   directory  for  an entry describing an account
                   on the remote machine. If no entry exists, ftp
                   prompts  for  the login name of the account on
                   the remote machine (the default is  the  login
                   name on the local machine), and, if necessary,
                   prompts for a password  and  an  account  with
                   which to login.


     -p
                   Enables passive mode for data transfers.  This
                   command  is useful when connecting to a remote
                   host  from  behind  a   connection   filtering
                   firewall.


     -s
                   Skips the SYST command that is sent by default
                   to  all  remote servers upon login. The system
                   command is what enables the automatic  use  of
                   binary  mode  rather than the protocol default
                   ascii mode.

                   As some older servers cannot  handle  the  ftp
                   command,  this  directive is provided to allow
                   inter-operability with these servers.


     -t
                   Enables packet tracing (unimplemented).


     -T timeout
                   Enables global connection timer, specified  in
                   seconds  (decimal).  There  is a timer for the
                   control connection that is reset when anything
                   is  sent  to the server and disabled while the
                   client is prompting for  user  input.  Another
                   independent  timer is used to monitor incoming
                   or outgoing data connections.


     -v
                   Shows all responses from the remote server, as
                   well  as  report  on data transfer statistics.
                   This is turned on by default if ftp is running
                   interactively  with  its input coming from the
                   user's terminal.


     -x
                   Attempts to use GSSAPI for authentication  and
                   encryption.  Data  and Command channel protec-
                   tion is set to "private".

     The following commands  can  be  specified  to  the  command
     interpreter:

     !
         [ command ] Runs command as a shell command on the local
         machine.  If no command is given, invokes an interactive
         shell.


     $ macro-name [ args ]
         Executes the macro macro-name that was defined with  the
         macdef  command.  Arguments  are  passed  to  the  macro
         unglobbed.


     account [ passwd ]
         Supplies 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  is  prompted  for  an  account  password in a non-
         echoing input mode.


     append local-file [ remote-file ]
         Appends a local file to a file on the remote machine. If
         remote-file  is  not  specified,  the local file name is
         used, subject to alteration by any ntrans or  nmap  set-
         tings.  File  transfer  uses  the  current  settings for
         "representation type", "file structure",  and  "transfer
         mode".


     ascii
         Sets the "representation type" to "network ASCII".  This
         is the default type.


     bell
         Sounds a bell after each file transfer command  is  com-
         pleted.


     binary
         Sets the "representation type" to "image".


     bye
         Terminates the FTP session with the  remote  server  and
         exit ftp. An EOF also terminates the session and exit.


     case
         Toggles remote computer file name  case  mapping  during
         mget  commands. When case is 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.


     cd remote-directory
         Changes the working directory on the remote  machine  to
         remote-directory.


     cdup
         Changes the remote  machine  working  directory  to  the
         parent of the current remote machine working directory.


     clear
         Sets the protection level on data transfers to  "clear".
         If  no  ADAT command succeeded, then this is the default
         protection level.


     close
         Terminates the FTP session with the remote  server,  and
         return  to  the  command interpreter. Any defined macros
         are erased.


     cr
         Toggles RETURN stripping  during  "network  ASCII"  type
         file retrieval. Records are denoted by a RETURN/LINEFEED
         sequence during "network ASCII" type file transfer. When
         cr  is  on (the default), RETURN characters are stripped
         from this sequence to conform with the UNIX system  sin-
         gle  LINEFEED  record  delimiter.  Records  on non-UNIX-
         system remote hosts can contain single LINEFEED  charac-
         ters;  when  an  "network  ASCII" type transfer is made,
         these LINEFEED characters can be  distinguished  from  a
         record delimiter only when cr is off.


     delete remote-file
         Deletes the file remote-file on the remote machine.

     debug
         Toggles debugging mode. When debugging is on, ftp prints
         each command sent to the remote machine, preceded by the
         string ->.


     dir [ remote-directory [ local-file ]]
         Prints a listing of the directory contents in the direc-
         tory,  remote-directory,  and,  optionally,  placing the
         output in local-file. 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 -,  out-
         put is sent to the terminal.


     disconnect
         A synonym for close.


     form [ format-name ]
         Sets  the  carriage  control  format  subtype   of   the
         "representation  type"  to  format-name.  The only valid
         format-name  is  non-print,  which  corresponds  to  the
         default "non-print" subtype.


     get remote-file [ local-file ]
         Retrieves 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,  sub-
         ject to alteration by the current case, ntrans, and nmap
         settings.  The  current  settings  for   "representation
         type",  "file  structure",  and "transfer mode" are used
         while transferring the file.


     glob
         Toggles filename expansion, or "globbing", for  mdelete,
         mget  and mput. If globbing is turned off, filenames are
         taken literally.

         Globbing for mput is done as in sh(1). For  mdelete  and
         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  radically
         different  from  expansion  of  the  name of an ordinary
         file: the exact result depends on the  remote  operating
         system  and  FTP  server,  and can be previewed with the
         command, mls remote-files -.

         mget and mput are not meant to transfer entire directory
         subtrees  of  files.  You  can do this by transferring a
         tar(1) archive of the subtree (using  a  "representation
         type" of "image" as set by the binary command).


     hash
         Toggles hash-sign  (#)  printing  for  each  data  block
         transferred. The size of a data block is 8192 bytes.


     help [ command ]
         Prints an informative message about the meaning of  com-
         mand.  If no argument is given, ftp prints a list of the
         known commands.


     lcd [ directory ]
         Changes the working directory on the local  machine.  If
         no  directory is specified, the user's home directory is
         used.


     ls [ -al | remote-directory [ local-file ]]
         By default, prints an abbreviated listing  of  the  con-
         tents of a directory on the remote machine. This default
         behavior can be changed to make ls a synonym of the  dir
         command.   This   change  can  be  achieved  by  setting
         FTP_LS_SENDS_NLST to `no' in /etc/default/ftp or in  the
         environment. See ftp(4) for details.

         The -a option lists all entries,  including  those  that
         begin with a dot (.), which are normally not listed. The
         -l option lists  files  in  long  format,  giving  mode,
         number  of  links, owner, group, size in bytes, and time
         of last modification for each file. If  the  file  is  a
         special  file, the size field instead contains the major
         and minor device numbers rather than a size. If the file
         is  a symbolic link, the filename is printed followed by
         "->" and the pathname of the referenced file.

         If remote-directory is  left  unspecified,  the  current
         working directory is used.

         If no local file is specified, or if  local-file  is  -,
         the output is sent to the terminal.

     macdef macro-name
         Defines a macro. Subsequent  lines  are  stored  as  the
         macro macro-name. A null line (consecutive NEWLINE char-
         acters in a file or RETURN characters from the terminal)
         terminates macro input mode. There is a limit of 16 mac-
         ros and 4096 total characters  in  all  defined  macros.
         Macros remain defined until a close command is executed.

         The macro processor interprets $ and \ as special  char-
         acters.  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
         $.


     mdelete remote-files
         Deletes the remote-files on the remote machine.


     mdir remote-files local-file
         Like dir, except multiple remote files can be specified.
         If  interactive prompting is on, ftp prompts the user to
         verify that the last argument is indeed the target local
         file for receiving mdir output.


     mget remote-files
         Expands the remote-files on the remote machine and do  a
         get  for  each  file  name  thus  produced. See glob for
         details on the filename expansion. Resulting file  names
         are  processed  according to case, ntrans, and nmap set-
         tings. Files are  transferred  into  the  local  working
         directory,  which can be changed with lcd directory. New
         local directories can be created with ! mkdir directory.


     mkdir directory-name
         Makes a directory on the remote machine.


     mls remote-files local-file
         Like ls(1), except multiple remote files can  be  speci-
         fied.  If  interactive  prompting is on, ftp prompts the
         user to verify that the last argument is indeed the tar-
         get local file for receiving mls output.


     mode [ mode-name ]
         Sets the "transfer mode" to mode-name.  The  only  valid
         mode-name  is  stream,  which corresponds to the default
         "stream" mode. This implementation only supports stream,
         and requires that it be specified.


     mput local-files
         Expands wild cards in the list of local files  given  as
         arguments  and  do  a put for each file in the resulting
         list.  See  glob  for  details  of  filename  expansion.
         Resulting  file  names are processed according to ntrans
         and nmap settings.


     nlist [ -al | remote-directory [ local-file ]]
         Prints an abbreviated  listing  of  the  contents  of  a
         directory  on  the  remote  machine,  listing only those
         files that can be retrieved by the get  command,  unless
         the -a or -l option is used. If remote-directory is left
         unspecified, the current working directory is used.

         The -a option lists all entries,  including  those  that
         begin with a dot (.), which are normally not listed. The
         -l option lists files in long format  the  same  way  it
         does when used with the ls command.


     nmap [ inpattern outpattern ]
         Sets or unsets the filename  mapping  mechanism.  If  no
         arguments  are specified, the filename mapping mechanism
         is unset. If arguments are specified,  remote  filenames
         are  mapped during mput commands and put commands issued
         without a specified remote target filename. If arguments
         are  specified,  local  filenames are mapped during mget
         commands and get commands  issued  without  a  specified
         local target filename.

         This command is useful when connecting  to  a  non-UNIX-
         system  remote  host  with different file naming conven-
         tions or practices. The mapping follows the pattern  set
         by inpattern and outpattern. inpattern is a template for
         incoming filenames (which can  have  already  been  pro-
         cessed according to the ntrans and case settings). Vari-
         able  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 deter-
         mine 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  replaced 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. SPACE characters can be included
         in outpattern, as in the example nmap $1 | sed "s/ *$//"
         > $1. Use the \ character to prevent  special  treatment
         of the $, [, ], and ,, characters.


     ntrans [ inchars [ outchars ] ]
         Sets  or  unsets  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 mput commands and put commands  issued
         without  a specified remote target filename, and charac-
         ters in local filenames are translated during mget  com-
         mands  and get commands issued without a specified local
         target filename.

         This command is useful when connecting  to  a  non-UNIX-
         system  remote  host  with different file naming conven-
         tions 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 char-
         acter is deleted from the file name.

         Only 16 characters can  be  translated  when  using  the
         ntrans  command under ftp. Use case (described above) if
         needing to convert the entire alphabet.


     open host [ port ]
         Establishes a  connection  to  the  specified  host  FTP
         server.  An  optional  port  number  can be supplied, in
         which case, ftp attempts to contact  an  FTP  server  at
         that  port. If the auto-login option is on (default set-
         ting), ftp also attempts to automatically log  the  user
         in to the FTP server.


     passive
         Toggles passive mode. When passive mode  is  turned  on,
         the  ftp  client  sends the PASV command requesting that
         the FTP server open a port for the data  connection  and
         return  the  address  of  that  port.  The remote server
         listens on that port and the client connects to it. When
         passive  mode  is  turned  off, the ftp client sends the
         PORT command to the server specifying an address for the
         remote server to connect back to. Passive mode is useful
         when the connections to the ftp client  are  controlled,
         for  example, when behind a firewall. When connecting to
         an IPv6-enabled FTP server, EPSV can be used in place of
         PASV and EPRT in place of PORT.


     private
         Sets  the  protection  level  on   data   transfers   to
         "private".  Data  transmissions are confidentiality- and
         integrity-protected by encryption. If  no  ADAT  command
         succeeded, then the only possible level is "clear".


     prompt
         Toggles  interactive  prompting.  Interactive  prompting
         occurs  during multiple file transfers to allow the user
         to selectively retrieve  or  store  files.  By  default,
         prompting  is turned on. If prompting is turned off, any
         mget or  mput  transfers  all  files,  and  any  mdelete
         deletes all files.


     protect protection-level
         Sets  the  protection  level  on   data   transfers   to
         protection-level.   The   valid  protection  levels  are
         "clear" for unprotected data transmissions,  "safe"  for
         data transmissions that are integrity-protected by cryp-
         tographic checksum, and "private" for data transmissions
         that  are  confidentiality-  and integrity- protected by
         encryption. If no ADAT command succeeded, then the  only
         possible level is "clear". If no level is specified, the
         current level is printed. The default  protection  level
         is "clear".

     proxy ftp-command
         Executes an FTP command on a secondary  control  connec-
         tion. This command allows simultaneous connection to two
         remote FTP servers for transferring  files  between  the
         two  servers. The first proxy command 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  proxy:  open  does  not define new macros during the
         auto-login process, close does not erase existing  macro
         definitions,  get  and mget transfer files from the host
         on the primary control connection to  the  host  on  the
         secondary control connection, and put, mputd, and append
         transfer files from the host on  the  secondary  control
         connection  to  the  host on the primary control connec-
         tion.

         Third party file transfers depend upon  support  of  the
         PASV command by the server on the secondary control con-
         nection.


     put local-file [ remote-file ]
         Stores a local file on the remote  machine.  If  remote-
         file  is  left  unspecified, the local file name is used
         after processing according to any ntrans  or  nmap  set-
         tings  in naming the remote file. File transfer uses the
         current settings for "representation type", "file struc-
         ture", and "transfer mode".


     pwd
         Prints the name of the current working directory on  the
         remote machine.


     quit
         A synonym for bye.


     quote arg1 arg2 ...
         Sends the arguments specified, verbatim, to  the  remote
         FTP  server.  A  single  FTP  reply  code is expected in
         return. (The remotehelp command displays a list of valid
         arguments.)

         quote should be used only by experienced users  who  are
         familiar with the FTP protocol.

     recv remote-file [ local-file ]
         A synonym for get.


     reget remote-file [ local-file ]
         The reget command 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 large files over networks that are prone to
         dropping connections.


     remotehelp [ command-name ]
         Requests help from the remote FTP server. If a  command-
         name is specified it is supplied to the server as well.


     rename from to
         Renames the file from on the remote machine to have  the
         name to.


     reset
         Clears  reply  queue.   This   command   re-synchronizes
         command/reply  sequencing  with  the  remote FTP server.
         Resynchronization can be necessary following a violation
         of the FTP protocol by the remote server.


     restart [ marker ]
         Restarts the immediately following get  or  put  at  the
         indicated  marker.  On UNIX systems, marker is usually a
         byte offset into the file. When followed by an mget, the
         restart applies to the first get performed. Specifying a
         marker of 0 clears the restart marker. If no argument is
         specified, the current restart status is displayed.


     rmdir directory-name
         Deletes a directory on the remote machine.


     runique
         Toggles 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 get or mget  command,  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  is  reported.
         runique does not affect local  files  generated  from  a
         shell command. The default value is off.


     safe
         Sets the protection level on data transfers  to  "safe".
         Data  transmissions  are  integrity-protected by crypto-
         graphic checksum. If no ADAT command succeeded, then the
         only possible level is "clear".


     send local-file [ remote-file ]
         A synonym for put.


     sendport
         Toggles the  use  of  PORT  commands.  By  default,  ftp
         attempts  to use a PORT command when establishing a con-
         nection for each data transfer. The use of PORT commands
         can   prevent   delays  when  performing  multiple  file
         transfers. If the  PORT  command  fails,  ftp  uses  the
         default data port. When the use of PORT commands is dis-
         abled, no attempt is made to use PORT commands for  each
         data  transfer. This is useful when connected to certain
         FTP  implementations  that  ignore  PORT  commands   but
         incorrectly indicate they have been accepted.


     site arg1 [ arg2 ] ...
         Sends the arguments specified, verbatim, to  the  remote
         FTP server as a SITE command.


     status
         Show the current status of ftp.


     struct [ struct-name ]
         Sets the file structure to struct-name. The  only  valid
         struct-name  is  file,  which corresponds to the default
         "file" structure. The implementation only supports file,
         and requires that it be specified.

     sunique
         Toggles storing of files on remote machine under  unique
         file  names. The remote FTP server must support the STOU
         command for successful  completion.  The  remote  server
         reports the unique name. Default value is off.


     tcpwindow [ size ]
         Sets the TCP window size to be  used  for  data  connec-
         tions. Specifying a size of 0 stops the explicit setting
         of the TCP window size on data connections. If no  argu-
         ment is specified, the current setting is displayed.


     tenex
         Sets the "representation type" to that needed to talk to
         TENEX machines.


     trace
         Toggles packet tracing (unimplemented).


     type [ type-name ]
         Sets the "representation type" to type-name.  The  valid
         type-names  are  ascii  for  "network  ASCII", binary or
         image for "image", and tenex for "local byte size"  with
         a byte size of 8 (used to talk to TENEX machines). If no
         type is specified, the  current  type  is  printed.  The
         default type is "network ASCII".


     user user-name [ password [ account ]]
         Identify yourself to the remote FTP server. If the pass-
         word  is  not  specified and the server requires it, ftp
         prompts the user for it (after disabling local echo). If
         an  account  field  is not specified, and the FTP server
         requires it, the user is prompted for it. If an  account
         field is specified, an account command is 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.


     verbose
         Toggles verbose mode. In  verbose  mode,  all  responses
         from  the  FTP  server  are  displayed  to  the user. In
         addition, if verbose mode is on, when  a  file  transfer
         completes,  statistics  regarding  the efficiency of the
         transfer are reported. By default, verbose mode is on if
         ftp's  commands are coming from a terminal, and off oth-
         erwise.


     ? [ command ]
         A synonym for help.



     Command arguments which have embedded spaces can  be  quoted
     with quote (") marks.


     If any command argument which  is  not  indicated  as  being
     optional is not specified, ftp prompts for that argument.

Aborting a File Transfer
     To abort a file transfer, use the  terminal  interrupt  key.
     Sending transfers is immediately halted. Receiving transfers
     are halted by sending an 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  does  not
     appear  until  the  remote  server has completed sending the
     requested file.


     The terminal interrupt key sequence is ignored when ftp  has
     completed  any local processing and is awaiting a reply from
     the remote server. A long delay in this mode can 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
     Local files specified as arguments to ftp commands are  pro-
     cessed according to the following rules.

     1)
           If the file name - is specified,  the  standard  input
           (for  reading)  or  standard  output  (for writing) is
           used.


     2)
           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(3C)  with
           the  argument  supplied,  and  reads (writes) from the
           standard output (standard input) of that shell. If the
           shell  command includes SPACE characters, the argument
           must be quoted; for example, | ls -lt. A  particularly
           useful example of this mechanism is: "dir | more".


     3)
           Failing the above  checks,  if  globbing  is  enabled,
           local  file  names are expanded according to the rules
           used in the sh(1); see the glob command.  If  the  ftp
           command  expects  a  single  local  file (for example,
           put), only the first filename generated by  the  glob-
           bing operation is used.


     4)
           For mget commands and get  commands  with  unspecified
           local  file  names,  the  local filename is the remote
           filename, which can be altered by a case,  ntrans,  or
           nmap  setting.  The  resulting  filename  can  then be
           altered if runique is on.


     5)
           For mput commands and put  commands  with  unspecified
           remote  file  names,  the remote filename is the local
           filename, which can be altered by  a  ntrans  or  nmap
           setting. The resulting filename can then be altered by
           the remote server if sunique is on.

File Transfer Parameters
     The FTP specification specifies many  parameters  which  can
     affect a file transfer.


     The "representation type" can be  one  of  "network  ASCII",
     "EBCDIC",  "image",  or  "local  byte size" with a specified
     byte size (for PDP-10's and PDP-20's mostly).  The  "network
     ASCII"  and  "EBCDIC"  types  have  a  further subtype which
     specifies whether vertical format control  (NEWLINE  charac-
     ters,  form  feeds,  and  so  on)  are  to be passed through
     ("non-print"), provided in  TELNET  format  ("TELNET  format
     controls"),  or provided in ASA (FORTRAN) ("carriage control
     (ASA)") format. ftp supports the  "network  ASCII"  (subtype
     "non-print"  only) and "image" types, plus "local byte size"
     with a byte size of 8 for communicating with TENEX machines.


     The "file structure" can be one of file  (no  record  struc-
     ture), record, or page. ftp supports only the default value,
     which is file.

     The  "transfer  mode"  can  be  one  of  stream,  block,  or
     compressed.  ftp  supports  only the default value, which is
     stream.

Usage
     See largefile(5) for the description of the behavior of  ftp
     when  encountering  files  greater  than or equal to 2 Gbyte
     (2^31 bytes).


     The ftp command is IPv6-enabled. See ip6(7P).

Files
     ~/.netrc

Attributes
     See attributes(5) for descriptions of the  following  attri-
     butes:



     tab() box; cw(2.75i) |cw(2.75i) lw(2.75i) |lw(2.75i)  ATTRI-
     BUTE   TYPEATTRIBUTE   VALUE   _  Availabilitynetwork/ftp  _
     CSIenabled

See Also
     ls(1),   rcp(1),   sh(1),   tar(1),    popen(3C),    ftp(4),
     ftpusers(4), mech(4), netrc(4), attributes(5), largefile(5),
     ip6(7P)


     Allman, M., Ostermann, S., and Metz, C. RFC 2428, FTP Exten_sions
     for  IPv6  and  NATs. The Internet Society. September
     1998.


     Lunt, S. J. RFC  2228,  FTP  Security  Extensions.  Internet
     Draft. November 1993.


     Postel, Jon, and Joyce Reynolds. RFC 959, File Transfer Pro_tocol
     (FTP ). Network Information Center. October 1985.


     Piscitello, D. RFC 1639,  FTP  Operation  Over  Big  Address
     Records (FOOBAR). Network Working Group. June 1994.

Notes
     Failure to log in can arise from an explicit denial  by  the
     remote   FTP   server  because  the  account  is  listed  in
     /etc/ftpusers.  See  ftpusers(4).

     Correct execution  of  many  commands  depends  upon  proper
     behavior by the remote server.


     An error in the treatment of carriage returns in the 4.2 BSD
     code  handling  transfers  with  a  "representation type" of
     "network ASCII" has  been  corrected.  This  correction  can
     result  in  incorrect  transfers of binary files to and from
     4.2 BSD servers using a "representation  type"  of  "network
     ASCII". Avoid this problem by using the "image" type.
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