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lftp(1)								       lftp(1)

NAME
       lftp - Sophisticated file transfer program

SYNTAX
       lftp [-d] [-e cmd] [-p port] [-u user[,pass]] [site]
       lftp -f script_file
       lftp -c commands
       lftp --version
       lftp --help


VERSION
       This man page documents lftp version 4.0.0.

DESCRIPTION
       lftp is a file transfer program that allows sophisticated ftp, http and
       other connections to other hosts. If site is specified then  lftp  will
       connect	to that site otherwise a connection has to be established with
       the open command.

       lftp can handle several file access methods - ftp, ftps,	 http,	https,
       hftp,  fish, sftp and file (https and ftps are only available when lftp
       is compiled with GNU TLS or  OpenSSL  library).	You  can  specify  the
       method  to  use	in  `open  URL' command, e.g. `open http://www.us.ker‐
       nel.org/pub/linux'. hftp is ftp-over-http-proxy	protocol.  It  can  be
       used   automatically   instead	of   ftp   if	ftp:proxy  is  set  to
       `http://proxy[:port]'. Fish is a protocol working over an  ssh  connec‐
       tion  to a unix account. SFtp is a protocol implemented in ssh2 as sftp
       subsystem.

       Besides FTP-like protocols, lftp has support for BitTorrent protocol as
       `torrent' command. Seeding is also supported.

       Every  operation	 in  lftp  is reliable, that is any not fatal error is
       ignored and the operation is repeated. So  if  downloading  breaks,  it
       will be restarted from the point automatically. Even if ftp server does
       not support REST command, lftp will try to retrieve the file  from  the
       very beginning until the file is transferred completely.

       lftp  has shell-like command syntax allowing you to launch several com‐
       mands in parallel in background (&). It is also possible to group  com‐
       mands within () and execute them in background. All background jobs are
       executed in the same single process. You can bring a foreground job  to
       background with ^Z (c-z) and back with command `wait' (or `fg' which is
       alias to `wait'). To list running jobs, use command `jobs'.  Some  com‐
       mands allow redirecting their output (cat, ls, ...) to file or via pipe
       to external command. Commands can be executed  conditionally  based  on
       termination status of previous command (&&, ||).

       If  you	exit  lftp when some jobs are not finished yet, lftp will move
       itself to nohup mode in background. The same happens when  you  have  a
       real modem hangup or when you close an xterm.

       lftp  has builtin mirror which can download or update a whole directory
       tree. There is also reverse mirror (mirror -R) which uploads or updates
       a  directory  tree  on  server. Mirror can also synchronize directories
       between two remote servers, using FXP if available.

       There is command `at' to launch a job at specified time in current con‐
       text,  command  `queue'	to queue commands for sequential execution for
       current server, and much more.

       On  startup,  lftp  executes  /etc/lftp.conf  and  then	~/.lftprc  and
       ~/.lftp/rc. You can place aliases and `set' commands there. Some people
       prefer to see full protocol debug, use `debug' to turn  the  debug  on.
       Use `debug 3' to see only greeting messages and error messages.

       lftp  has  a  number of settable variables. You can use `set -a' to see
       all variables and their values or `set -d' to  see  list	 of  defaults.
       Variable	 names can be abbreviated and prefix can be omitted unless the
       rest becomes ambiguous.

       If lftp was compiled with OpenSSL (configure --with-openssl),  then  it
       includes	 software  developed  by  the  OpenSSL	Project for use in the
       OpenSSL Toolkit. (http://www.openssl.org/)

   Commands
       ! shell command

       Launch shell or shell command.

	    !ls

       To do a directory listing of the local host.

       alias  [name [value]]

       Define or undefine alias name. If value is omitted, the alias is	 unde‐
       fined,  else it takes the value value. If no argument is given the cur‐
       rent aliases are listed.

	    alias dir ls -lF
	    alias less zmore

       anon

       Sets the user to anonymous.  This is the default.

       at time [ -- command ]

       Wait until the given time and execute  given  (optional)	 command.  See
       also at(1).

       bookmark	 [subcommand]

       The bookmark command controls bookmarks.
	    add <name> [<loc>]	add current place or given location
			   to bookmarks and bind to given name
	    del <name>		remove bookmark with name
	    edit	   start editor on bookmarks file
	    import <type>	import foreign bookmarks
	    list	   list bookmarks (default)

       cache  [subcommand]

       The  cache  command controls local memory cache.	 The following subcom‐
       mands are recognized:
	    stat	   print cache status (default)
	    on|off		turn on/off caching
	    flush		flush cache
	    size lim		set memory limit, -1 means unlimited
	    expire Nx	   set cache expiration time to N seconds (x=s)
			   minutes (x=m) hours (x=h) or days (x=d)

       cat files

       cat outputs the remote file(s) to stdout.  (See	also  more,  zcat  and
       zmore)

       cd rdir

       Change  current	remote	directory.   The  previous remote directory is
       stored as `-'. You can do `cd -' to change  the	directory  back.   The
       previous	 directory for each site is also stored on disk, so you can do
       `open site; cd -' even after lftp restart.

       chmod mode files

       Change permission mask on remote files. The mode must be an octal  num‐
       ber.

       close [-a]

       Close  idle  connections.  By default only with the current server, use
       -a to close all idle connections.

       cls [OPTS] files...

       `cls' tries to retrieve information about specified files  or  directo‐
       ries  and outputs the information according to format options. The dif‐
       ference between `ls' and `cls' is that `ls' requests the server to for‐
       mat file listing, and `cls' formats it itself, after retrieving all the
       needed information.  See `help cls' for options.

       command cmd args...

       execute given command ignoring aliases.

       debug [-o file] level|off

       Switch debugging to level or turn it off.  Use -o to redirect the debug
       output to a file.

       echo [-n] string

       guess what it does.

       eval [-f format ] args...

       without	-f  it	just  executes	given arguments as a command. With -f,
       arguments are transformed into a new command. The  format  can  contain
       plain  text and placeholders $0...$9 and $@, corresponding to the argu‐
       ments.

       exit [bg] [top] [kill] [code]

       exit will exit from lftp or move to  background	if  there  are	active
       jobs. If no job is active, code is passed to operating system as lftp's
       termination status. If code is omitted, the exit code of	 last  command
       is used.

       `exit  bg'  forces  moving  to  background  when cmd:move-background is
       false.  `exit top' makes	 top  level  `shell'  (internal	 lftp  command
       executor)  terminate.  `exit kill' kills all numbered jobs before exit‐
       ing. The options can be combined, e.g.  `at 08:00 -- exit top  kill  &'
       kills all jobs and makes lftp exit at specified time.

       fg

       Alias for `wait'.

       find  [directory]

       List files in the directory (current directory by default) recursively.
       This can help with servers lacking ls -R support. You can redirect out‐
       put of this command.

       ftpcopy

       Obsolete. Use one of the following instead:
	    get ftp://... -o ftp://...
	    get -O ftp://... file1 file2...
	    put ftp://...
	    mput ftp://.../*
	    mget -O ftp://... ftp://.../*
       or  other  combinations	to  get FXP transfer (directly between two ftp
       servers).  lftp would fallback to plain copy (via client) if FXP trans‐
       fer cannot be initiated or ftp:use-fxp is false.

       get [-E] [-a] [-c] [-O base] rfile [-o lfile] ...

       Retrieve	 the  remote  file rfile and store it as the local file lfile.
       If -o is omitted, the file is stored to local file named as  base  name
       of  rfile.  You can get multiple files by specifying multiple instances
       of rfile (and -o lfile). Does not expand wildcards, use mget for that.
	    -c	      continue, reget
	    -E	      delete source files after successful transfer
	    -a	      use ascii mode (binary is the default)
	    -O <base> specifies base directory or URL where files should be placed

       Examples:
	    get README
	    get README -o debian.README
	    get README README.mirrors
	    get README -o debian.README README.mirrors -o debian.mirrors
	    get README -o ftp://some.host.org/debian.README
	    get README -o ftp://some.host.org/debian-dir/ (end slash is important)

       get1 [OPTS] rfile

       Transfer a single file. Options:
	    -o <lfile>	   destination file name (default - basename of rfile)
	    -c	      continue, reget
	    -E	      delete source files after successful transfer
	    -a	      use ascii mode (binary is the default)
	    --source-region=<from-to>
		      transfer specified region of source file
	    --target-position=<pos>
		      position in target file to write data at

       glob [-d] [-a] [-f] command patterns

       Glob given patterns containing metacharacters and pass result to	 given
       command.	 E.g. ``glob echo *''.
	    -f	 plain files (default)
	    -d	 directories
	    -a	 all types

       help [cmd]

       Print help for cmd or if no cmd was specified print a list of available
       commands.

       jobs [-v]

       List running jobs. -v means verbose, several -v can be specified.

       kill all|job_no

       Delete specified job with job_no or all jobs.  (For job_no see jobs)

       lcd ldir

       Change current local directory ldir. The previous  local	 directory  is
       stored as `-'. You can do `lcd -' to change the directory back.

       lpwd

       Print current working directory on local machine.

       ls params

       List  remote  files. You can redirect output of this command to file or
       via pipe to external command.  By default, ls output is cached, to  see
       new listing use rels or cache flush.

       mget [-c] [-d] [-a] [-E] [-O base] files

       Gets selected files with expanded wildcards.

	    -c	      continue, reget.
	    -d	      create directories the same as file names and get
		      the files into them instead of current directory.
	    -E	      delete source files after successful transfer
	    -a	      use ascii mode (binary is the default)
	    -O <base> specifies base directory or URL where files should be placed

       mirror [OPTS] [source [target]]

       Mirror  specified source directory to local target directory. If target
       directory ends with a slash, the source base name is appended to target
       directory  name.	 Source and/or target can be URLs pointing to directo‐
       ries.

	    -c, --continue	continue a mirror job if possible
	    -e, --delete	delete files not present at remote site
		--delete-first	     delete old files before transferring new ones
		--depth-first	     descend into subdirectories before transferring files
	    -s, --allow-suid	     set suid/sgid bits according to remote site
		--allow-chown	try to set owner and group on files
		--ascii		use ascii mode transfers (implies --ignore-size)
		--ignore-time	     ignore time when deciding whether to download
		--ignore-size	     ignore size when deciding whether to download
		--only-missing	download only missing files
		--only-existing download only files already existing at target
	    -n, --only-newer	download only newer files (-c won't work)
		--no-empty-dirs don't create empty directories (implies --depth-first)
	    -r, --no-recursion	don't go to subdirectories
		--no-symlinks	don't create symbolic links
	    -p, --no-perms	don't set file permissions
		--no-umask	don't apply umask to file modes
	    -R, --reverse	reverse mirror (put files)
	    -L, --dereference	download symbolic links as files
	    -N, --newer-than=SPEC    download only files newer than specified time
		--on-change=CMD	     execute the command if anything has been changed
		--older-than=SPEC    download only files older than specified time
		--size-range=RANGE   download only files with size in specified range
	    -P, --parallel[=N]	download N files in parallel
		--use-pget[-n=N]     use pget to transfer every single file
		--loop		loop until no changes found
	    -i RX, --include RX include matching files
	    -x RX, --exclude RX exclude matching files
	    -I GP, --include-glob GP include matching files
	    -X GP, --exclude-glob GP exclude matching files
	    -v, --verbose[=level]    verbose operation
		--log=FILE	write lftp commands being executed to FILE
		--script=FILE	     write lftp commands to FILE, but don't execute them
		--just-print, --dry-run	  same as --script=-
		--use-cache	     use cached directory listings
	    --Remove-source-files    remove files after transfer (use with caution)
	    -a		   same as --allow-chown --allow-suid --no-umask

       When using -R, the first directory is local and the second  is  remote.
       If  the	second	directory  is omitted, base name of first directory is
       used.  If both directories are omitted, current local and remote direc‐
       tories  are  used.   If target directory ends with a slash (except root
       directory) then base name of source directory is appended.

       RX is an extended regular expression, just like in egrep(1).

       GP is a glob pattern, e.g. `*.zip'.

       Include and exclude options can be specified multiple times.  It	 means
       that a file or directory would be mirrored if it matches an include and
       does not match to excludes after the include, or does  not  match  any‐
       thing  and  the	first check is exclude. Directories are matched with a
       slash appended.

       Note that symbolic links are  not  created  when	 uploading  to	remote
       server,	because	 ftp  protocol cannot do it. To upload files the links
       refer to, use `mirror -RL' command (treat symbolic links as files).

       For option --newer-than you can either specify a file or time  specifi‐
       cation like that used by at(1) command, e.g. `now-7days' or `week ago'.
       If you specify a file, then modification time  of  that	file  will  be
       used.

       Verbosity level can be selected using --verbose=level option or by sev‐
       eral -v options, e.g. -vvv. Levels are:
	    0 - no output (default)
	    1 - print actions
	    2 - +print not deleted file names (when -e is not specified)
	    3 - +print directory names which are mirrored

       --only-newer turns off file size comparison and uploads/downloads  only
       newer  files  even  if  size  is	 different. By default older files are
       transferred and replace newer ones.

       You can mirror between two servers  if  you  specify  URLs  instead  of
       directories.   FXP  is  used  automatically  for	 transfers between ftp
       servers, if possible.

       Some ftp servers hide dot-files by default (e.g. .htaccess),  and  show
       them only when LIST command is used with -a option. In such case try to
       use `set ftp:list-options -a'.

       mkdir [-p] dir(s)

       Make remote directories. If -p is used, make all components of paths.

       module module [ args ]

       Load given module using dlopen(3) function. If  module  name  does  not
       contain a slash, it is searched in directories specified by module:path
       variable.   Arguments  are  passed   to	 module_init   function.   See
       README.modules for technical details.

       more files

       Same  as	 `cat  files  |	 more'. if PAGER is set, it is used as filter.
       (See also cat, zcat and zmore)

       mput [-c] [-d] [-a] [-E] [-O base] files

       Upload files with wildcard expansion. By default it uses the base  name
       of local name as remote one. This can be changed by `-d' option.
	    -c	      continue, reput
	    -d	      create directories the same as in file names and put the
		      files into them instead of current directory
	    -E	      delete source files after successful transfer (dangerous)
	    -a	      use ascii mode (binary is the default)
	    -O <base> specifies base directory or URL where files should be placed

       mrm file(s)

       Same as `glob rm'. Removes specified file(s) with wildcard expansion.

       mv file1 file2

       Rename file1 to file2.

       nlist [args]

       List remote file names

       open [-e cmd] [-u user[,pass]] [-p port] host|url

       Select an ftp server.

       pget [OPTS] rfile [-o lfile]

       Gets  the  specified  file using several connections. This can speed up
       transfer, but loads the net and server heavily impacting	 other	users.
       Use only if you really have to transfer the file ASAP.  Options:
	    -c	      continue transfer. Requires lfile.lftp-pget-status file.
	    -n maxconn	   set maximum number of connections (default is taken from pget:default-n setting)

       put [-E] [-a] [-c] [-O base] lfile [-o rfile]

       Upload  lfile  with  remote name rfile. If -o omitted, the base name of
       lfile is used as remote name. Does not expand wildcards, use  mput  for
       that.
	    -o <rfile>	   specifies remote file name (default - basename of lfile)
	    -c	      continue, reput
		      it requires permission to overwrite remote files
	    -E	      delete source files after successful transfer (dangerous)
	    -a	      use ascii mode (binary is the default)
	    -O <base> specifies base directory or URL where files should be placed

       pwd [-p]

       Print current remote URL. Use `-p' option to show password in the URL.

       queue [-n num ] cmd

       Add  the given command to queue for sequential execution. Each site has
       its own queue. `-n' adds the command  before  the  given	 item  in  the
       queue.  Don't try to queue `cd' or `lcd' commands, it may confuse lftp.
       Instead do the cd/lcd before `queue' command, and it will remember  the
       place in which the command is to be done. It is possible to queue up an
       already running job by `queue wait <jobno>', but the job will  continue
       execution even if it is not the first in queue.

       `queue stop' will stop the queue, it will not execute any new commands,
       but already running jobs will continue to run. You can use `queue stop'
       to  create an empty stopped queue. `queue start' will resume queue exe‐
       cution.	When you exit lftp, it will start all stopped queues automati‐
       cally.

       `queue'	with  no arguments will either create a stopped queue or print
       queue status.

       queue --delete|-d [index or wildcard expression]

       Delete one or more items from the queue. If no argument is  given,  the
       last entry in the queue is deleted.

       queue --move|-m <index or wildcard expression> [index]

       Move  the given items before the given queue index, or to the end if no
       destination is given.

	    -q	 Be quiet.
	    -v	 Be verbose.
	    -Q	 Output in a format that can be used to re-queue.
		 Useful with --delete.

	    > get file &
	    [1] get file
	    > queue wait 1
	    > queue get another_file
	    > cd a_directory
	    > queue get yet_another_file

	    queue -d 3		Delete the third item in the queue.
	    queue -m 6 4	Move the sixth item in the queue before the fourth.
	    queue -m "get*zip" 1     Move all commands matching "get*zip" to the beginning
			   of the queue.  (The order of the items is preserved.)
	    queue -d "get*zip"	Delete all commands matching "get*zip".

       quote cmd

       For FTP - send the command uninterpreted. Use with  caution  -  it  can
       lead  to unknown remote state and thus will cause reconnect. You cannot
       be sure that any change of remote state because of  quoted  command  is
       solid - it can be reset by reconnect at any time.

       For   HTTP  -  specific	to  HTTP  action.  Syntax:  ``quote  <command>
       [<args>]''.  Command may be ``set-cookie'' or ``post''.
	    open http://www.site.net
	    quote set-cookie "variable=value; othervar=othervalue"
	    set http:post-content-type application/x-www-form-urlencoded
	    quote post /cgi-bin/script.cgi "var=value&othervar=othervalue" > local_file

       For FISH - send the command uninterpreted. This can be used to  execute
       arbitrary  commands on server. The command must not take input or print
       ### at new line beginning. If it does, the protocol will become out  of
       sync.
	    open fish://server
	    quote find -name \*.zip

       reget rfile [-o lfile]

       Same as `get -c'.

       rels [args]

       Same as `ls', but ignores the cache.

       renlist [args]

       Same as `nlist', but ignores the cache.

       repeat [ -c <count>] [[-d] delay] [command]

       Repeat  the  command.  Between  the  commands  a	 delay is inserted, by
       default 1 second.  Option `-c'  limits  number  of  repeations.	Option
       `--while-ok'  breaks  loop  when	 command  returns  non-zero exit code;
       `--until-ok' breaks on zero exit code.
       Examples:
	    repeat at tomorrow -- mirror
	    repeat 1d mirror

       reput lfile [-o rfile]

       Same as `put -c'.

       rm [-r] [-f] files

       Remove remote files.  Does not expand wildcards, use mrm for  that.  -r
       is  for recursive directory remove. Be careful, if something goes wrong
       you can lose files. -f suppress error messages.

       rmdir dir(s)

       Remove remote directories.

       scache [session]

       List cached sessions or switch to specified session.

       set [var [val]]

       Set variable to given value. If the value is omitted, unset  the	 vari‐
       able.   Variable	 name  has  format ``name/closure'', where closure can
       specify exact application of the setting. See below  for	 details.   If
       set  is	called with no variable then only altered settings are listed.
       It can be changed by options:

	    -a	 list all settings, including default values
	    -d	 list only default values, not necessary current ones

       site site_cmd

       Execute site command site_cmd and output the result.  You can  redirect
       its output.

       sleep interval

       Sleep  given time interval and exit. Interval is in seconds by default,
       but can be suffixed with 'm', 'h', 'd'  for  minutes,  hours  and  days
       respectively.  See also at.

       slot [name]

       Select  specified slot or list all slots allocated. A slot is a connec‐
       tion to a server, somewhat like a virtual console. You can create  mul‐
       tiple slots connected to different servers and switch between them. You
       can also use slot:name as a pseudo-URL evaluating to  that  slot	 loca‐
       tion.

       Default readline binding allows quick switching between slots named 0-9
       using Meta-0 - Meta-9 keys (often you can use Alt instead of Meta).

       source file
       source -e command

       Execute commands recorded in file file or returned by specified	exter‐
       nal command.
	    source ~/.lftp/rc
	    source -e echo help

       suspend

       Stop  lftp  process. Note that transfers will be also stopped until you
       continue the process with shell's fg or bg commands.

       torrent torrent-file [-O directory]

       Start BitTorrent process for the given torrent-file,  which  can	 be  a
       local  file  or URL. Existing files are first validated. Missing pieces
       are downloaded. Files are stored	 in  specified	directory  or  current
       working directory by default. Seeding continues until ratio reachs tor‐
       rent:stop-on-ratio setting or time of torrent:seed-max-time outs.

       user user [pass]
       user URL [pass]

       Use specified info for remote login. If you specify an  URL  with  user
       name, the entered password will be cached so that future URL references
       can use it.

       version

       Print lftp version.

       wait [jobno]
       wait all

       Wait for specified job to terminate. If jobno is omitted, wait for last
       backgrounded job.

       `wait all' waits for all jobs termination.

       zcat files

       Same as cat, but filter each file through zcat. (See also cat, more and
       zmore)

       zmore files

       Same as more, but filter each file through zcat. (See  also  cat,  zcat
       and more)

   Settings
       On  startup,  lftp  executes  ~/.lftprc	and ~/.lftp/rc.	 You can place
       aliases and `set' commands there. Some people prefer to see full proto‐
       col debug, use `debug' to turn the debug on.

       There  is also a system-wide startup file in /etc/lftp.conf.  It can be
       in different directory, see FILES section.

       lftp has the following settable variables (you can also use `set -a' to
       see all variables and their values):

       bmk:save-passwords (boolean)
	      save plain text passwords in ~/.lftp/bookmarks on `bookmark add'
	      command.	Off by default.

       cmd:at-exit (string)
	      the commands in string are executed before lftp exits.

       cmd:csh-history (boolean)
	      enables csh-like history expansion.

       cmd:default-protocol (string)
	      The value is used when `open' is used with just host name	 with‐
	      out protocol. Default is `ftp'.

       cmd:fail-exit (boolean)
	      if true, exit when an unconditional (without || and && at begin)
	      command fails.

       cmd:long-running (seconds)
	      time of command execution, which is considered as `long'	and  a
	      beep is done before next prompt. 0 means off.

       cmd:ls-default (string)
	      default ls argument

       cmd:move-background (boolean)
	      when  false,  lftp  refuses to go to background when exiting. To
	      force it, use `exit bg'.

       cmd:move-background-detach (boolean)
	      when true (default), lftp detaches itself from the control  ter‐
	      minal  when  moving  to background, it is not possible to attach
	      back; when false, lftp tricks the shell to move  lftp  to	 back‐
	      ground process group and continues to run, then fg shell command
	      brings lftp back to foreground unless it has done all  jobs  and
	      terminated.

       cmd:prompt (string)
	      The prompt. lftp recognizes the following backslash-escaped spe‐
	      cial characters that are decoded as follows:

	      \@     insert @ if current user is not default
	      \a     an ASCII bell character (07)
	      \e     an ASCII escape character (033)
	      \h     the hostname you are connected to
	      \n     newline
	      \s     the name of the client (lftp)
	      \S     current slot name
	      \u     the username of the user you are logged in as
	      \U     the     URL     of	    the	    remote     site	(e.g.,
		     ftp://g437.ub.gu.se/home/james/src/lftp)
	      \v     the version of lftp (e.g., 2.0.3)
	      \w     the current working directory at the remote site
	      \W     the  base	name  of  the current working directory at the
		     remote site
	      \nnn   the character corresponding to the octal number nnn
	      \\     a backslash
	      \?     skips next character if previous substitution was empty.
	      \[     begin a sequence of non-printing characters, which	 could
		     be	 used  to  embed  a terminal control sequence into the
		     prompt
	      \]     end a sequence of non-printing characters

       cmd:parallel (number)
	      Number of jobs run in  parallel  in  non-interactive  mode.  For
	      example, this may be useful for scripts with multiple `get' com‐
	      mands. Note that setting this to a value greater than 1  changes
	      conditional  execution  behaviour,  basically makes it inconsis‐
	      tent.

       cmd:queue-parallel (number)
	      Number of jobs run in parallel in a queue.

       cmd:time-style (string)
	      This setting is the default value for cls --time-style option.

       cmd:trace (boolean)
	      when true, lftp prints the commands it executes (like sh -x).

       cache:cache-empty-listings (boolean)
	      When false, empty listings are not cached.

       cache:enable (boolean)
	      When false, cache is disabled.

       cache:expire (time interval)
	      Positive cache entries expire in this time interval.

       cache:expire-negative (time interval)
	      Negative cache entries expire in this time interval.

       cache:size (number)
	      Maximum cache size. When exceeded, oldest cache entries will  be
	      removed from cache.

       cmd:remote-completion (boolean)
	      a boolean to control whether or not lftp uses remote completion.

       cmd:verify-host (boolean)
	      if  true, lftp resolves host name immediately in `open' command.
	      It is also possible to skip the check for a single  `open'  com‐
	      mand if `&' is given, or if ^Z is pressed during the check.

       cmd:verify-path (boolean)
	      if true, lftp checks the path given in `cd' command.  It is also
	      possible to skip the check for a single `cd' command if  `&'  is
	      given, or if ^Z is pressed during the check.  Examples:
		   set cmd:verify-path/hftp://* false
		   cd directory &

       cmd:verify-path-cached (boolean)
	      When  false,  `cd'  to  a directory known from cache as existent
	      will  succeed  immediately.   Otherwise  the  verification  will
	      depend on cmd:verify-path setting.

       color:use-color (boolean)
	      when  true, cls command and completion output colored file list‐
	      ings according to color:dir-colors setting.

       color:dir-colors (string)
	      file listing color description. By default the value of  LS_COL‐
	      ORS environment variable is used. See dircolors(1).

       dns:SRV-query (boolean)
	      query for SRV records and use them before gethostbyname. The SRV
	      records are only used if port is not explicitly  specified.  See
	      RFC2052 for details.

       dns:cache-enable (boolean)
	      enable  DNS  cache.  If  it is off, lftp resolves host name each
	      time it reconnects.

       dns:cache-expire (time interval)
	      time to  live  for  DNS  cache  entries.	It  has	 format	 <num‐
	      ber><unit>+,  e.g.   1d12h30m5s  or just 36h. To disable expira‐
	      tion, set it to `inf' or `never'.

       dns:cache-size (number)
	      maximum number of DNS cache entries.

       dns:fatal-timeout (time interval)
	      limit the time for DNS queries. If DNS server is unavailable too
	      long,  lftp  will	 fail  to  resolve  a  given host name. Set to
	      `never' to disable.

       dns:order (list of protocol names)
	      sets the order of DNS queries. Default is ``inet6	 inet''	 which
	      means  first  look up address in inet6 family, then inet and use
	      them in that order.  To disable inet6 (AAAA)  lookup,  set  this
	      variable to ``inet''.

       dns:use-fork (boolean)
	      if  true,	 lftp will fork before resolving host address. Default
	      is true.

       dns:max-retries (number)
	      If zero, there is no limit on the number of times lftp will  try
	      to lookup an address.  If > 0, lftp will try only this number of
	      times to look up an address of each address family in dns:order.

       file:charset (string)
	      local character set. It is set from current locale initially.

       fish:charset (string)
	      the character set used by fish server in requests,  replies  and
	      file listings.  Default is empty which means the same as local.

       fish:connect-program (string)
	      the  program  to	use for connecting to remote server. It should
	      support `-l' option for user name, `-p' for port number. Default
	      is `ssh -a -x'. You can set it to `rsh', for example.

       fish:shell (string)
	      use  specified shell on server side. Default is /bin/sh. On some
	      systems, /bin/sh exits when doing cd to  a  non-existent	direc‐
	      tory.  lftp  can	handle that but it has to reconnect. Set it to
	      /bin/bash for such systems if bash is installed.

       ftp:acct (string)
	      Send this string in ACCT command	after  login.  The  result  is
	      ignored.	The closure for this setting has format user@host.

       ftp:anon-pass (string)
	      sets  the password used for anonymous ftp access authentication.
	      Default is "-name@", where name is the username of the user run‐
	      ning the program.

       ftp:anon-user (string)
	      sets the user name used for anonymous ftp access authentication.
	      Default is "anonymous".

       ftp:auto-sync-mode (regex)
	      if first server message matches this regex, turn	on  sync  mode
	      for that host.

       ftp:charset (string)
	      the  character  set  used by ftp server in requests, replies and
	      file listings.  Default is empty which means the same as	local.
	      This setting is only used when the server does not support UTF8.

       ftp:client (string)
	      the  name	 of ftp client to send with CLNT command, if supported
	      by server.  If it is empty, then no CLNT command will be sent.

       ftp:bind-data-socket (boolean)
	      bind data socket to the interface of control connection (in pas‐
	      sive  mode).   Default is true, exception is the loopback inter‐
	      face.

       ftp:fix-pasv-address (boolean)
	      if true, lftp will try to correct address returned by server for
	      PASV  command  in	 case when server address is in public network
	      and PASV returns an address from a private network. In this case
	      lftp would substitute server address instead of the one returned
	      by PASV command, port number would not be changed.   Default  is
	      true.

       ftp:fxp-passive-source (boolean)
	      if  true,	 lftp  will try to set up source ftp server in passive
	      mode first, otherwise destination one. If first  attempt	fails,
	      lftp  tries  to set them up the other way. If the other disposi‐
	      tion fails too, lftp falls back to plain copy. See also ftp:use-
	      fxp.

       ftp:home (string)
	      Initial directory. Default is empty string which means auto. Set
	      this to `/' if you don't like the look of %2F in ftp  URLs.  The
	      closure for this setting has format user@host.

       ftp:ignore-pasv-address (boolean)
	      If true, lftp uses control connection address instead of the one
	      returned in PASV reply for data connection. This can  be	useful
	      for broken NATs.	Default is false.

       ftp:list-empty-ok (boolean)
	      if  set  to false, empty lists from LIST command will be treated
	      as incorrect, and another method (NLST) will be used.

       ftp:list-options (string)
	      sets options which are always appended to LIST command.  It  can
	      be  useful to set this to `-a' if server does not show dot (hid‐
	      den) files by default.  Default is empty.

       ftp:nop-interval (seconds)
	      delay between NOOP commands when downloading  tail  of  a	 file.
	      This  is	useful	for ftp servers which send "Transfer complete"
	      message before flushing data transfer. In such cases  NOOP  com‐
	      mands can prevent connection timeout.

       ftp:passive-mode (boolean)
	      sets  passive  ftp  mode. This can be useful if you are behind a
	      firewall or a dumb masquerading router.  In  passive  mode  lftp
	      uses  PASV command, not the PORT command which is used in active
	      mode. In passive mode lftp itself makes the data	connection  to
	      the  server; in active mode the server connects to lftp for data
	      transfer. Passive mode is the default.

       ftp:port-ipv4 (ipv4 address)
	      specifies an IPv4 address to send with PORT command. Default  is
	      empty  which  means  to send the address of local end of control
	      connection.

       ftp:port-range (from-to)
	      allowed port range for  active  mode.   Format  is  min-max,  or
	      `full' or `any' to indicate any port. Default is `full'.

       ftp:prefer-epsv (boolean)
	      use EPSV as preferred passive mode. Default is `false'.

       ftp:proxy (URL)
	      specifies	 ftp proxy to use.  To disable proxy set this to empty
	      string. Note that it is an ftp proxy which  uses	ftp  protocol,
	      not ftp over http. Default value is taken from environment vari‐
	      able ftp_proxy if it starts with ``ftp://''. If your  ftp	 proxy
	      requires	authentication,	 specify user name and password in the
	      URL.  If ftp:proxy starts with http:// then hftp	protocol  (ftp
	      over http proxy) is used instead of ftp automatically.

       ftp:proxy-auth-type (string)
	      When  set	 to ``joined'', lftp sends ``user@proxy_user@ftp.exam‐
	      ple.org'' as user name to proxy, and ``password@proxy_password''
	      as password.

	      When  set	 to ``joined-acct'', lftp sends ``user@ftp.example.org
	      proxy_user'' (with space) as user name to proxy. The site	 pass‐
	      word  is sent as usual and the proxy password is expected in the
	      following ACCT command.

	      When set to ``open'', lftp first	sends  proxy  user  and	 proxy
	      password	and  then  ``OPEN ftp.example.org'' followed by ``USER
	      user''.  The site password is then sent as usual.

	      When set to ``user'' (default), lftp first sends proxy user  and
	      proxy  password  and then ``user@ftp.example.org'' as user name.
	      The site password is then sent as usual.

	      When  set	 to  ``proxy-user@host'',  lftp	 first	sends	``USER
	      proxy_user@ftp.example.org'', then proxy password. The site user
	      and password are then sent as usual.

       ftp:rest-list (boolean)
	      allow usage of REST command before LIST command. This  might  be
	      useful  for  large  directories,	but  some ftp servers silently
	      ignore REST before LIST.

       ftp:rest-stor (boolean)
	      if false, lftp will not try to use REST before STOR. This can be
	      useful  for  some	 buggy servers which corrupt (fill with zeros)
	      the file if REST followed by STOR is used.

       ftp:retry-530 (regex)
	      Retry on server reply 530 for PASS command if text matches  this
	      regular  expression.   This  setting should be useful to distin‐
	      guish between overloaded server (temporary condition) and incor‐
	      rect password (permanent condition).

       ftp:retry-530-anonymous (regex)
	      Additional   regular   expression	  for  anonymous  login,  like
	      ftp:retry-530.

       ftp:site-group (string)
	      Send this string in SITE GROUP command after login.  The	result
	      is ignored.  The closure for this setting has format user@host.

       ftp:skey-allow (boolean)
	      allow  sending  skey/opie reply if server appears to support it.
	      On by default.

       ftp:skey-force (boolean)
	      do not send plain text password over the network, use  skey/opie
	      instead. If skey/opie is not available, assume failed login. Off
	      by default.

       ftp:ssl-allow (boolean)
	      if true, try to negotiate SSL connection	with  ftp  server  for
	      non-anonymous  access.  Default is true. This and other ssl set‐
	      tings are only available if lftp was compiled  with  an  ssl/tls
	      library.

       ftp:ssl-data-use-keys (boolean)
	      if  true,	 lftp loads ssl:key-file for protected data connection
	      too. When false, it does not, and the server can match data  and
	      control connections by session ID.  Default is true.

       ftp:ssl-force (boolean)
	      if  true,	 refuse to send password in clear when server does not
	      support SSL.  Default is false.

       ftp:ssl-protect-data (boolean)
	      if true, request ssl connection for data transfers. This is cpu-
	      intensive but provides privacy. Default is false.

       ftp:ssl-protect-fxp (boolean)
	      if  true,	 request  ssl connection for data transfer between two
	      ftp servers in FXP mode. CPSV or SSCN command will  be  used  in
	      that  case.  If ssl connection fails for some reason, lftp would
	      try unprotected FXP transfer unless ftp:ssl-force is set for any
	      of the two servers. Default is false.

       ftp:ssl-protect-list (boolean)
	      if true, request ssl connection for file list transfers. Default
	      is true.

       ftp:ssl-use-ccc (boolean)
	      if true, lftp would issue CCC command after logon, thus  disable
	      ssl protection layer on control connection.

       ftp:stat-interval (time interval)
	      interval between STAT commands. Default is 1 second.

       ftp:sync-mode (boolean)
	      if  true,	 lftp  will  send  one	command at a time and wait for
	      response. This might be useful if you  are  using	 a  buggy  ftp
	      server  or router. When it is off, lftp sends a pack of commands
	      and waits for responses - it speeds up operation when round trip
	      time  is	significant.   Unfortunately it does not work with all
	      ftp servers and some routers have troubles with it, so it is  on
	      by default.

       ftp:timezone (string)
	      Assume  this timezone for time in listings returned by LIST com‐
	      mand.  This setting can be GMT offset [+|-]HH[:MM[:SS]]  or  any
	      valid	  TZ	   value      (e.g.	 Europe/Moscow	    or
	      MSK-3MSD,M3.5.0,M10.5.0/3). The default is GMT.  Set  it	to  an
	      empty  value  to	assume local timezone specified by environment
	      variable TZ.

       ftp:trust-feat (string)
	      When true, assume that FEAT returned data are correct and	 don't
	      use common protocol extensions like SIZE, MDTM, REST if they are
	      not listed.  Default is false.

       ftp:use-abor (boolean)
	      if false, lftp does not send ABOR command but closes  data  con‐
	      nection immediately.

       ftp:use-allo (boolean)
	      when  true (default), lftp sends ALLO command before uploading a
	      file.

       ftp:use-feat (boolean)
	      when  true  (default),  lftp  uses  FEAT	command	 to  determine
	      extended features of ftp server.

       ftp:use-fxp (boolean)
	      if  true,	 lftp will try to set up direct connection between two
	      ftp servers.

       ftp:use-hftp (boolean)
	      when ftp:proxy points to an http	proxy,	this  setting  selects
	      hftp  method  (GET,  HEAD)  when	true,  and CONNECT method when
	      false. Default is true.

       ftp:lang (boolean)
	      the language selected with LANG command, if supported  as	 indi‐
	      cated  by	 FEAT  response.  Default  is empty which means server
	      default.

       ftp:use-mdtm (boolean)
	      when true (default), lftp uses MDTM command  to  determine  file
	      modification time.

       ftp:use-mdtm-overloaded (boolean)
	      when true, lftp uses two argument MDTM command to set file modi‐
	      fication time on uploaded files. Default is false.

       ftp:use-site-idle (boolean)
	      when true, lftp sends `SITE IDLE' command	 with  net:idle	 argu‐
	      ment. Default is false.

       ftp:use-site-utime (boolean)
	      when  true,  lftp	 sends	5-argument `SITE UTIME' command to set
	      file modification time on uploaded files. Default is true.

       ftp:use-site-utime2 (boolean)
	      when true, lftp sends 2-argument `SITE  UTIME'  command  to  set
	      file  modification  time on uploaded files. Default is true.  If
	      5-argument `SITE UTIME' is also enabled, 2-argument  command  is
	      tried first.

       ftp:use-size (boolean)
	      when  true  (default),  lftp uses SIZE command to determine file
	      size.

       ftp:use-stat (boolean)
	      if true, lftp sends STAT command in FXP mode  transfer  to  know
	      how  much data has been transferred. See also ftp:stat-interval.
	      Default is true.

       ftp:use-stat-for-list (boolean)
	      when true, lftp uses STAT instead of LIST	 command.  By  default
	      `.'  is  used as STAT argument. Using STAT, lftp avoids creating
	      data connection for directory listing. Some servers require spe‐
	      cial  options  for  STAT,	 use  ftp:list-options to specify them
	      (e.g. -la).

       ftp:use-telnet-iac (boolean)
	      when true (default), lftp uses TELNET IAC	 command  and  follows
	      TELNET  protocol as specified in RFC959. When false, it does not
	      follow TELNET protocol and thus does not double 255 (0xFF, 0377)
	      character and does not prefix ABOR and STAT commands with TELNET
	      IP+SYNCH signal.

       ftp:use-quit (boolean)
	      if true, lftp sends QUIT before disconnecting from  ftp  server.
	      Default is true.

       ftp:verify-address (boolean)
	      verify  that  data  connection comes from the network address of
	      control connection peer. This can possibly prevent data  connec‐
	      tion  spoofing which can lead to data corruption. Unfortunately,
	      this can fail for	 certain  ftp  servers	with  several  network
	      interfaces,  when	 they  do  not	set  outgoing  address on data
	      socket, so it is disabled by default.

       ftp:verify-port (boolean)
	      verify that data connection has port 20 (ftp-data) on its remote
	      end.   This  can	possibly  prevent  data connection spoofing by
	      users of remote host. Unfortunately, too many windows  and  even
	      unix  ftp	 servers forget to set proper port on data connection,
	      thus this check is off by default.

       ftp:web-mode (boolean)
	      disconnect after closing data connection. This can be useful for
	      totally broken ftp servers. Default is false.

       ftps:initial-prot (string)
	      specifies	 initial  PROT setting for FTPS connections. Should be
	      one of: C, S, E, P, or  empty.  Default  is  empty  which	 means
	      unknown,	so that lftp will use PROT command unconditionally. If
	      PROT command turns out to be unsupported, then Clear mode	 would
	      be assumed.

       hftp:cache (boolean)
	      allow server/proxy side caching for ftp-over-http protocol.

       hftp:cache-control (string)
	      specify corresponding HTTP request header.

       hftp:proxy (URL)
	      specifies http proxy for ftp-over-http protocol (hftp). The pro‐
	      tocol hftp cannot work without a http proxy, obviously.  Default
	      value  is taken from environment variable ftp_proxy if it starts
	      with   ``http://'',   otherwise	from   environment    variable
	      http_proxy.   If your ftp proxy requires authentication, specify
	      user name and password in the URL.

       hftp:use-authorization (boolean)
	      if set to off, lftp will send password as part  of  URL  to  the
	      proxy.  This  may	 be  required  for some proxies (e.g. M-soft).
	      Default is on, and lftp will send password as part of Authoriza‐
	      tion header.

       hftp:use-head (boolean)
	      if  set to off, lftp will try to use `GET' instead of `HEAD' for
	      hftp protocol.  While this is slower, it may allow lftp to  work
	      with  some  proxies  which  don't understand or mishandle ``HEAD
	      ftp://'' requests.

       hftp:use-mkcol (boolean)
	      if set to off, lftp will try to use `PUT' instead of `MKCOL'  to
	      create directories with hftp protocol. Default is off.

       hftp:use-propfind (boolean)
	      if set to off, lftp will not try to use `PROPFIND' to get direc‐
	      tory contents with hftp protocol and use `GET' instead.  Default
	      is off.

       hftp:use-type (boolean)
	      If  set to off, lftp won't try to append `;type=' to URLs passed
	      to proxy.	  Some	broken	proxies	 don't	handle	it  correctly.
	      Default is on.

       http:accept, http:accept-charset, http:accept-language (string)
	      specify corresponding HTTP request headers.

       http:authorization (string)
	      the  authorization to use by default, when no user is specified.
	      The format is ``user:password''. Default is empty which means no
	      authorization.

       http:cache (boolean)
	      allow server/proxy side caching.

       http:cache-control (string)
	      specify corresponding HTTP request header.

       http:cookie (string)
	      send this cookie to server. A closure is useful here:
		   set cookie/www.somehost.com "param=value"

       http:post-content-type (string)
	      specifies	 value	of  Content-Type  http request header for POST
	      method.  Default is ``application/x-www-form-urlencoded''.

       http:proxy (URL)
	      specifies http proxy. It is used when lftp works over http  pro‐
	      tocol.	Default	 value	is  taken  from	 environment  variable
	      http_proxy.  If your proxy requires authentication, specify user
	      name and password in the URL.

       http:put-method (PUT or POST)
	      specifies which http method to use on put.

       http:put-content-type (string)
	      specifies	 value	of  Content-Type  http	request header for PUT
	      method.

       http:referer (string)
	      specifies value for Referer http request header. Single dot  `.'
	      expands  to  current directory URL. Default is `.'. Set to empty
	      string to disable Referer header.

       http:set-cookies (boolean)
	      if true, lftp modifies  http:cookie  variables  when  Set-Cookie
	      header is received.

       http:use-mkcol (boolean)
	      if  set to off, lftp will try to use `PUT' instead of `MKCOL' to
	      create directories with http protocol. Default is on.

       http:use-propfind (boolean)
	      if set to off, lftp will not try to use `PROPFIND' to get direc‐
	      tory  contents with http protocol and use `GET' instead. Default
	      is on.

       http:user-agent (string)
	      the string lftp sends in User-Agent header of HTTP request.

       https:proxy (string)
	      specifies https proxy. Default value is taken  from  environment
	      variable https_proxy.

       mirror:dereference (boolean)
	      when  true,  mirror  will dereference symbolic links by default.
	      You can override	it  by	--no-dereference  option.  Default  if
	      false.

       mirror:exclude-regex (regex)
	      specifies	 default  exclusion  pattern.  You  can override it by
	      --include option.

       mirror:include-regex (regex)
	      specifies default inclusion pattern. It is used just after  mir‐
	      ror:exclude-regex	  is   applied.	 It  is	 never	used  if  mir‐
	      ror:exclude-regex is empty.

       mirror:order (list of patterns)
	      specifies order of file transfers. E.g. setting this  to	"*.sfv
	      *.sum" makes mirror to transfer files matching *.sfv first, then
	      ones matching *.sum and then all other files. To process	direc‐
	      tories after other files, add "*/" to end of pattern list.

       mirror:parallel-directories (boolean)
	      if  true, mirror will start processing of several directories in
	      parallel when it is in parallel mode. Otherwise, it will	trans‐
	      fer  files from a single directory before moving to other direc‐
	      tories.

       mirror:parallel-transfer-count (number)
	      specifies number of parallel  transfers  mirror  is  allowed  to
	      start.  Default  is  1.	You  can  override  it with --parallel
	      option.

       mirror:set-permissions (boolean)
	      When set to off, mirror won't try to  copy  file	and  directory
	      permissions.   You can override it by --perms option. Default is
	      on.

       mirror:use-pget-n (number)
	      specifies -n option for pget command used to transfer every sin‐
	      gle file under mirror. Default is 1 which disables pget.

       module:path (string)
	      colon  separated list of directories to look for modules. Can be
	      initialized by environment variable LFTP_MODULE_PATH. Default is
	      `PKGLIBDIR/VERSION:PKGLIBDIR'.

       net:connection-limit (number)
	      maximum  number  of  concurrent  connections to the same site. 0
	      means unlimited.

       net:connection-takeover (boolean)
	      if true, foreground connections have  priority  over  background
	      ones  and can interrupt background transfers to complete a fore‐
	      ground operation.

       net:idle (time interval)
	      disconnect from server after this idle time. Default is  3  min‐
	      utes.

       net:limit-rate (bytes per second)
	      limit  transfer  rate on data connection. 0 means unlimited. You
	      can specify two numbers separated by colon to limit download and
	      upload rate separately.

       net:limit-max (bytes)
	      limit accumulating of unused limit-rate. 0 means twice of limit-
	      rate.

       net:limit-total-rate (bytes per second)
	      limit transfer rate of all connections in sum.  0	 means	unlim‐
	      ited.  You  can  specify two numbers separated by colon to limit
	      download and upload rate separately.   Note  that	 sockets  have
	      receive  buffers	on  them,  this	 can lead to network link load
	      higher than this rate limit just after transfer  beginning.  You
	      can  try	to  set net:socket-buffer to relatively small value to
	      avoid this.

       net:limit-total-max (bytes)
	      limit accumulating of unused limit-total-rate. 0 means twice  of
	      limit-total-rate.

       net:max-retries (number)
	      the maximum number of sequential retries of an operation without
	      success.	0 means unlimited.

       net:no-proxy (string)
	      contains comma separated list of domains for which proxy	should
	      not  be  used.   Default	is  taken  from	 environment  variable
	      no_proxy.

       net:persist-retries (number)
	      ignore this number of hard errors. Useful to login to buggy  ftp
	      servers which reply 5xx when there is too many users.

       net:reconnect-interval-base (seconds)
	      sets  the	 base minimal time between reconnects. Actual interval
	      depends  on  net:reconnect-interval-multiplier  and  number   of
	      attempts to perform an operation.

       net:reconnect-interval-max (seconds)
	      sets  maximum  reconnect	interval.  When current interval after
	      multiplication by net:reconnect-interval-multiplier reachs  this
	      value  (or exceeds it), it is reset back to net:reconnect-inter‐
	      val-base.

       net:reconnect-interval-multiplier (real number)
	      sets multiplier by which base interval is multiplied  each  time
	      new  attempt  to	perform	 an operation fails. When the interval
	      reachs maximum, it is reset to base  value.  See	net:reconnect-
	      interval-base and net:reconnect-interval-max.

       net:socket-bind-ipv4 (ipv4 address)
	      bind  all	 IPv4 sockets to specified address. This can be useful
	      to select a specific network interface to use. Default is	 empty
	      which  means  not	 to  bind  IPv4 sockets, operating system will
	      choose an address automatically using routing table.

       net:socket-bind-ipv6 (ipv6 address)
	      the same for IPv6 sockets.

       net:socket-buffer (bytes)
	      use given size for SO_SNDBUF and	SO_RCVBUF  socket  options.  0
	      means system default.

       net:socket-maxseg (bytes)
	      use  given  size for TCP_MAXSEG socket option. Not all operating
	      systems support this option, but linux does.

       net:timeout (time interval)
	      sets the network protocol timeout.

       pget:default-n (number)
	      default number of chunks to split the file to in pget.

       pget:save-status (time interval)
	      save pget transfer status this often. Set to `never' to  disable
	      saving  of  the status file.  The status is saved to a file with
	      suffix .lftp-pget-status.

       sftp:charset (string)
	      the character set used by sftp server in	file  names  and  file
	      listings.	  Default is empty which means the same as local. This
	      setting is only used for sftp protocol version prior to 4.  Ver‐
	      sion 4 and later always use UTF-8.

       sftp:connect-program (string)
	      the  program  to	use for connecting to remote server. It should
	      support `-l' option for user name, `-p' for port number. Default
	      is `ssh -a -x'. You can set it to `rsh', for example.

       sftp:max-packets-in-flight (number)
	      The maximum number of unreplied packets in flight. If round trip
	      time  is	significant,  you  should  increase  this  and	 size-
	      read/size-write. Default is 16.

       sftp:protocol-version (number)
	      The  protocol number to negotiate. Default is 4. The actual pro‐
	      tocol version used depends on server.

       sftp:server-program (string)
	      The server program implementing SFTP protocol. If	 it  does  not
	      contain  a  slash	 `/', it is considered a ssh2 subsystem and -s
	      option  is  used	when  starting	connect-program.   Default  is
	      `sftp'. You can use rsh as transport level protocol like this:
		   set sftp:connect-program rsh
		   set sftp:server-program /usr/libexec/openssh/sftp-server
	      Similarly you can run sftp over ssh1.

       sftp:size-read (number)
	      Block size for reading. Default is 0x8000.

       sftp:size-write (number)
	      Block size for writing. Default is 0x8000.

       ssl:ca-file (path to file)
	      use specified file as Certificate Authority certificate.

       ssl:ca-path (path to directory)
	      use  specified  directory	 as  Certificate Authority certificate
	      repository (OpenSSL only).

       ssl:check-hostname (boolean)
	      when true, lftp checks if the host name used to connect  to  the
	      server corresponds to the host name in its certificate.

       ssl:crl-file (path to file)
	      use specified file as Certificate Revocation List certificate.

       ssl:crl-path (path to directory)
	      use  specified directory as Certificate Revocation List certifi‐
	      cate repository (OpenSSL only).

       ssl:key-file (path to file)
	      use specified file as your private key.

       ssl:cert-file (path to file)
	      use specified file as your certificate.

       ssl:verify-certificate (boolean)
	      if set to yes, then verify server's certificate to be signed  by
	      a	 known Certificate Authority and not be on Certificate Revoca‐
	      tion List.

       torrent:ip (ipv4 address)
	      IP address for the tracker. Specify it if you are using an  http
	      proxy.

       torrent:max-peers (number)
	      maximum  number  of  peers  for  a torrent. Least used peers are
	      removed to maintain this limit.

       torrent:port-range (from-to)
	      port range to accept connections on. A single port  is  selected
	      when a torrent starts.

       torrent:seed-max-time (time interval)
	      maximum  seed time. After this period of time a complete torrent
	      shuts down independently of ratio. It can be set to infinity  if
	      needed.

       torrent:seed-min-peers (number)
	      minimum  number  of peers when the torrent is complete. If there
	      are less, new peers are actively searched for.

       torrent:stop-on-ratio (real number)
	      torrent stops when it's complete and ratio reached this number.

       xfer:clobber (boolean)
	      if this setting is off, get commands will not overwrite existing
	      files and generate an error instead. Default is on.

       xfer:destination-directory (path or URL to directory)
	      This  setting is used as default -O option for get and mget com‐
	      mands.  Default is empty, which means current directory  (no  -O
	      option).

       xfer:full-disk-fatal (boolean)
	      when true, lftp aborts a thansfer if it cannot write target file
	      because of full disk or quota; when false, lftp waits  for  disk
	      space to be freed.

       xfer:eta-period (seconds)
	      the  period  over	 which	weighted average rate is calculated to
	      produce ETA.

       xfer:eta-terse (boolean)
	      show terse ETA (only high order parts). Default is true.

       xfer:log (boolean)
	      when true, lftp logs transfers to ~/.lftp/transfer_log.

       xfer:max-redirections (number)
	      maximum number of redirections. This can be useful for download‐
	      ing over HTTP.  0 prohibits redirections.

       xfer:rate-period (seconds)
	      the  period over which weighted average rate is calculated to be
	      shown.

       The name of a variable can be abbreviated unless it becomes  ambiguous.
       The prefix before `:' can be omitted too. You can set one variable sev‐
       eral times for different closures, and thus you can  get	 a  particular
       settings	 for  particular  state.  The closure is to be specified after
       variable name separated with slash `/'.

       The closure for `dns:', `net:', `ftp:', `http:', `hftp:'	 domain	 vari‐
       ables  is  currently just the host name as you specify it in the `open'
       command (with  some  exceptions	where  closure	is  meaningless,  e.g.
       dns:cache-size).	  For some `cmd:' domain variables the closure is cur‐
       rent URL without path.  For other variables it is not  currently	 used.
       See examples in the sample lftp.conf.

       Certain	commands  and  settings take a time interval parameter. It has
       the format Nx[Nx...], where N is time amount (floating point) and x  is
       time  unit: d - days, h - hours, m - minutes, s - seconds. Default unit
       is second. E.g. 5h30m or 5.5h.  Also the interval  can  be  `infinity',
       `inf',  `never',	 `forever'  -  it means infinite interval. E.g. `sleep
       forever' or `set dns:cache-expire never'.

       Boolean settings can be one of (true, on, yes, 1, +) for a  True	 value
       or one of (false, off, no, 0, -) for a False value.

       Integer	settings can have a suffix: k - kibi, m - mebi, g - gigi, etc.
       They can also have a prefix: 0 - octal, 0x - hexadecimal.

   FTP asynchronous mode (pipelining)
       Lftp can speed up ftp operations by sending several  commands  at  once
       and  then checking all the responses. See ftp:sync-mode variable. Some‐
       times this does not work, thus synchronous mode is the default. You can
       try  to	turn  synchronous  mode off and see if it works for you. It is
       known that some network software dealing with address translation works
       incorrectly in the case of several FTP commands in one network packet.

       RFC959 says: ``The user-process sending another command before the com‐
       pletion reply would be in violation of protocol;	 but  server-FTP  pro‐
       cesses  should queue any commands that arrive while a preceding command
       is in progress''. Also, RFC1123 says: ``Implementors  MUST  NOT	assume
       any  correspondence  between  READ boundaries on the control connection
       and the Telnet EOL sequences (CR LF).'' and ``a single  READ  from  the
       control connection may include more than one FTP command''.

       So  it  must  be safe to send several commands at once, which speeds up
       operation a lot and seems to work with  all  Unix  and  VMS  based  ftp
       servers.	 Unfortunately, windows based servers often cannot handle sev‐
       eral commands in one packet, and so cannot some broken routers.

OPTIONS
       -d     Switch on debugging mode

       -e commands
	      Execute given commands and don't exit.

       -p port
	      Use the given port to connect

       -u user[,pass]
	      Use the given username and password to connect

       -f script_file
	      Execute commands in the file and exit

       -c commands
	      Execute the given commands and exit. Commands can	 be  separated
	      with a semicolon, `&&' or `||'.

ENVIRONMENT VARIABLES
       The following environment variables are processed by lftp:

       HOME   Used for (local) tilde (`~') expansion

       SHELL  Used by the ! command to determine the shell to run.

       PAGER  This  should  be the name of the pager to use.  It's used by the
	      more and zmore commands.

       http_proxy, https_proxy
	      Used to set initial http:proxy, hftp:proxy and https:proxy vari‐
	      ables.

       ftp_proxy
	      Used to set initial ftp:proxy or hftp:proxy variables, depending
	      on URL protocol used in this environment variable.

       no_proxy
	      Used to set initial net:no-proxy variable.

       LFTP_MODULE_PATH
	      Used to set initial module:path variable.

       LFTP_HOME
	      Used to locate the directory that stores user-specific  configu‐
	      ration files.  If unset, ~/.lftp will be used.

       LS_COLORS
	      used to set initial color:dir-colors variable.

FILES
       /etc/lftp.conf
	      system-wide   startup   file.   Actual   location	  depends   on
	      --sysconfdir configure option. It is /etc when prefix  is	 /usr,
	      /usr/local/etc by default.

       ~/.lftp/rc, ~/.lftprc
	      These files are executed on lftp startup after /etc/lftp.conf.

       ~/.lftp/log
	      The  file	 things	 are  logged to when lftp moves into the back‐
	      ground in nohup mode.

       ~/.lftp/transfer_log
	      The file transfers are logged to when xfer:log setting is set to
	      `yes'.

       ~/.lftp/bookmarks
	      The  file	 is  used to store lftp's bookmarks.  See the bookmark
	      command.

       ~/.lftp/cwd_history
	      The file is used to store last working directories for each site
	      visited.

       ~/.netrc
	      The  file	 is consulted to get default login and password to ftp
	      server.  Passwords are also searched here if an  URL  with  user
	      name but with no password is used.

SEE ALSO
       ftpd(8), ftp(1)
       RFC854  (telnet),  RFC959  (ftp),  RFC1123, RFC1945 (http/1.0), RFC2052
       (SRV RR),  RFC2228  (ftp	 security  extensions),	 RFC2389  (ftp	FEAT),
       RFC2428	(ftp/ipv6),  RFC2518  (WebDAV),	 RFC2616  (http/1.1),  RFC2617
       (http/1.1 authentication), RFC2640 (ftp i18n), RFC4217 (ftp over ssl).
       http://www.ietf.org/internet-drafts/draft-ietf-ftpext-mlst-16.txt (ftp
       extensions over RFC959),
       http://www.ietf.org/internet-drafts/draft-ietf-secsh-filexfer-10.txt
       (sftp).

AUTHOR
       Alexander V. Lukyanov
       lav@yars.free.net

ACKNOWLEDGMENTS
       This manual page was originally written by  Christoph  Lameter  <clame‐
       ter@debian.org>, for the Debian GNU/Linux system. The page was improved
       and updated later by Nicolas Lichtmaier	<nick@Feedback.com.ar>,	 James
       Troup	<J.J.Troup@comp.brad.ac.uk>    and   Alexander	 V.   Lukyanov
       <lav@yars.free.net>.

				  11 Sep 2009			       lftp(1)
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