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curl command man page

curl(1)  Curl Manual       curl(1)

NAME
       curl - transfer a URL

SYNOPSIS
       curl [options] [URL...]

DESCRIPTION
       curl  is a tool to transfer data from or to a server, using one of the
       supported protocols (HTTP, HTTPS, FTP, FTPS, TFTP, DICT, TELNET,  LDAP
       or FILE).  The command is designed to work without user interaction.

       curl offers a busload of useful tricks like proxy support, user authen-
       tication, ftp upload, HTTP post, SSL  (https:) connections,  cookies,
       file  transfer  resume  and  more. As you will see below, the amount of
       features will make your head spin!

       curl is powered by  libcurl  for all  transfer-related features.  See
       libcurl(3) for details.

URL
       The  URL syntax is protocol dependent. You’ll find a detailed descrip-
       tion in RFC 3986.

       You can specify multiple URLs or parts of URLs  by  writing  part  sets
       within braces as in:

http://site.{one,two,three}.com

       or you can get sequences of alphanumeric series by using [] as in:

ftp://ftp.numericals.com/file[1-100].txt
ftp://ftp.numericals.com/file[001-100].txt    (with leading zeros)
ftp://ftp.letters.com/file[a-z].txt

       No nesting of the sequences is supported at the moment, but you can use
       several ones next to each other:

http://any.org/archive[1996-1999]/vol[1-4]/part{a,b,c}.html

       You can specify any amount of URLs on the command line. They  will  be
       fetched in a sequential manner in the specified order.

       Since  curl 7.15.1 you can also specify step counter for the ranges, so
       that you can get every Nth number or letter:

http://www.numericals.com/file[1-100:10].txt
http://www.letters.com/file[a-z:2].txt

       If you specify URL without protocol:// prefix,  curl  will  attempt  to
       guess  what  protocol  you might want. It will then default to HTTP but
       try other protocols based on often-used host name prefixes.  For exam-
       ple,  for  host names starting with "ftp." curl will assume you want to
       speak FTP.

       Curl will attempt to re-use connections for multiple file transfers, so
       that  getting many files from the same server will not do multiple con-
       nects / handshakes. This improves speed. Of course this is only done on
       files  specified on  a single command line and cannot be used between
       separate curl invokes.

PROGRESS METER
       curl normally displays a progress meter during  operations,  indicating
       amount of transfered data, transfer speeds and estimated time left etc.

       However, since curl displays data to the terminal by  default,  if  you
       invoke  curl  to do  an operation and it is about to write data to the
       terminal, it disables the progress meter as otherwise it would mess  up
       the output mixing progress meter and response data.

       If you want a progress meter for HTTP POST or PUT requests, you need to
       redirect the response output to a file, using shell  redirect  (>),  -o
       [file] or similar.

       It  is  not the same case for FTP upload as that operation is not spit-
       ting out any response data to the terminal.

       If you prefer a progress "bar" instead of the regular meter, -# is your
       friend.

OPTIONS
       -a/--append
     (FTP)  When used in an FTP upload, this will tell curl to append
     to the target file  instead  of  overwriting  it. If  the  file
     doesn’t exist, it will be created.

     If this option is used twice, the second one will disable append
     mode again.

       -A/--user-agent <agent string>
     (HTTP) Specify the User-Agent string to send to the HTTP server.
     Some  badly  done CGIs fail if its not set to "Mozilla/4.0".  To
     encode blanks in the string, surround  the  string  with single
     quote  marks.   This can also be set with the -H/--header option
     of course.

     If this option is set more than once, the last one will  be  the
     one that’s used.

       --anyauth
     (HTTP) Tells curl to figure out authentication method by itself,
     and use the most secure one the remote site claims it  supports.
     This is done by first doing a request and checking the response-
     headers, thus inducing an extra network round-trip. This is used
     instead  of  setting a specific authentication method, which you
     can do with --basic, --digest, --ntlm, and --negotiate.

     Note that using --anyauth is not recommended if you  do  uploads
     from  stdin, since it may require data to be sent twice and then
     the client must be able to rewind. If the need should arise when
     uploading from stdin, the upload operation will fail.

     If  this option is used several times, the following occurrences
     make no difference.

       -b/--cookie <name=data>
     (HTTP) Pass the data to the HTTP server as a cookie. It is  sup-
     posedly  the data previously received from the server in a "Set-
     Cookie:" line.  The data should be in the format "NAME1=VALUE1;
     NAME2=VALUE2".

     If  no  ’=’ letter is used in the line, it is treated as a file-
     name to use to read previously stored cookie lines  from, which
     should  be used in this session if they match. Using this method
     also activates the "cookie parser" which will make  curl record
     incoming cookies too, which may be handy if you’re using this in
     combination with the -L/--location option. The  file  format  of
     the  file to  read cookies from should be plain HTTP headers or
     the Netscape/Mozilla cookie file format.

     NOTE that the file specified with -b/--cookie is only  used  as
     input.  No cookies will be stored in the file. To store cookies,
     use the -c/--cookie-jar option or you could even save  the  HTTP
     headers to a file using -D/--dump-header!

     If  this option is set more than once, the last one will be the
     one that’s used.

       -B/--use-ascii
     Enable ASCII transfer when using FTP or LDAP. For FTP, this  can
     also  be enforced by using an URL that ends with ";type=A". This
     option causes data sent to stdout to be in text mode  for win32
     systems.

     If  this option is used twice, the second one will disable ASCII
     usage.

       --basic
     (HTTP) Tells curl to use HTTP Basic authentication. This is  the
     default  and this option is usually pointless, unless you use it
     to override a  previously set  option  that  sets  a  different
     authentication  method  (such  as --ntlm, --digest and --negoti-
     ate).

     If this option is used several times, the following  occurrences
     make no difference.

       --ciphers <list of ciphers>
     (SSL) Specifies which ciphers to use in the connection. The list
     of ciphers must be using valid ciphers. Read up  on  SSL cipher
     list     details       on    this  URL:
     http://www.openssl.org/docs/apps/ciphers.html

     If this option is used several times, the last one will override
     the others.

       --compressed
     (HTTP) Request a compressed response using one of the algorithms
     libcurl supports, and return the uncompressed document.  If this
     option  is  used and  the server sends an unsupported encoding,
     Curl will report an error.

     If this option is used several times, each occurrence will  tog-
     gle it on/off.

       --connect-timeout <seconds>
     Maximum  time  in seconds  that you allow the connection to the
     server to take.  This only limits the  connection  phase,  once
     curl  has connected this option is of no more use. See also the
     -m/--max-time option.

     If this option is used several times, the last one will be used.

       -c/--cookie-jar <file name>
     Specify to which file you want curl to write all cookies after a
     completed operation. Curl writes all  cookies  previously  read
     from  a  specified  file as  well  as all cookies received from
     remote server(s). If no cookies are known, no file will be writ-
     ten.  The file  will  be written using the Netscape cookie file
     format. If you set the file name to  a  single  dash,  "-",  the
     cookies will be written to stdout.

     NOTE If the cookie jar can’t be created or written to, the whole
     curl operation won’t fail or even report an error clearly. Using
     -v  will get  a warning displayed, but that is the only visible
     feedback you get about this possibly lethal situation.

     If this option is used several times, the last  specified  file
     name will be used.

       -C/--continue-at <offset>
     Continue/Resume  a  previous  file transfer at the given offset.
     The given offset is the exact  number  of bytes that  will  be
     skipped  counted from the beginning of the source file before it
     is transferred to the destination.  If used  with uploads,  the
     ftp server command SIZE will not be used by curl.

     Use  "-C -" to tell curl to automatically find out where/how to
     resume the transfer. It then uses the given  output/input files
     to figure that out.

     If this option is used several times, the last one will be used.

       --create-dirs
     When used in conjunction with the -o option,  curl  will create
     the  necessary  local directory hierarchy as needed. This option
     creates the dirs mentioned with the -o option, nothing else.  If
     the  -o file name uses no dir or if the dirs it mentions already
     exist, no dir will be created.

     To create remote directories when using FTP,  try --ftp-create-
     dirs.

       --crlf (FTP) Convert LF to CRLF in upload. Useful for MVS (OS/390).

     If  this option is used several times, the following occurrences
     make no difference.

       -d/--data <data>
     (HTTP) Sends the specified data in a POST request to  the  HTTP
     server,  in  a way that can emulate as if a user has filled in a
     HTML form and pressed the submit button. Note that the  data  is
     sent  exactly  as specified  with no extra processing (with all
     newlines cut off).  The data is expected to  be "url-encoded".
     This  will  cause curl to pass the data to the server using the
     content-type   application/x-www-form-urlencoded.  Compare   to
     -F/--form.  If  this  option  is used more than once on the same
     command line, the data pieces specified will be merged  together
     with  a  separating  &-letter.  Thus,  using  ’-d name=daniel -d
     skill=lousy’  would  generate  a post  chunk  that  looks  like
     ’name=daniel&skill=lousy’.

     If  you  start  the data with the letter @, the rest should be a
     file name to read the data from, or - if you want curl  to  read
     the  data from stdin.  The contents of the file must already be
     url-encoded. Multiple files can also be specified. Posting  data
     from  a file named ’foobar’ would thus be done with --data @foo-
     bar".

     To post data purely binary, you should instead use  the  --data-
     binary option.

     -d/--data is the same as --data-ascii.

     If  this option is  used several times, the ones following the
     first will append data.

       --data-ascii <data>
     (HTTP) This is an alias for the -d/--data option.

     If this option is used several times,  the  ones following  the
     first will append data.

       --data-binary <data>
     (HTTP) This posts data in a similar manner as --data-ascii does,
     although when using this option the entire context of the posted
     data  is kept  as-is. If you want to post a binary file without
     the strip-newlines feature of the --data-ascii option,  this  is
     for you.

     If  this option is  used several times, the ones following the
     first will append data.

       --digest
     (HTTP) Enables HTTP Digest authentication. This is a authentica-
     tion that prevents the password from being sent over the wire in
     clear text. Use this in combination with the  normal  -u/--user
     option to set user name and password. See also --ntlm, --negoti-
     ate and --anyauth for related options.

     If this option is used several times, the following  occurrences
     make no difference.

       --disable-eprt
     (FTP) Tell curl to disable the use of the EPRT and LPRT commands
     when doing active FTP transfers. Curl will normally always first
     attempt  to use EPRT, then LPRT before using PORT, but with this
     option, it will use PORT right away. EPRT and  LPRT  are exten-
     sions  to the original FTP protocol, may not work on all servers
     but enable more functionality in a better way  than  the tradi-
     tional PORT command.

     If  this option is used several times, each occurrence will tog-
     gle this on/off.

       --disable-epsv
     (FTP) Tell curl to disable the use  of  the  EPSV command  when
     doing  passive  FTP  transfers.  Curl will normally always first
     attempt to use EPSV before PASV, but with this option,  it  will
     not try using EPSV.

     If  this option is used several times, each occurrence will tog-
     gle this on/off.

       -D/--dump-header <file>
     Write the protocol headers to the specified file.

     This option is handy to use when you want to store  the  headers
     that  a  HTTP  site sends to you. Cookies from the headers could
     then be read in a second curl invoke by  using  the  -b/--cookie
     option!  The  -c/--cookie-jar  option is however a better way to
     store cookies.

     When used on FTP, the ftp server response lines  are  considered
     being "headers" and thus are saved there.

     If this option is used several times, the last one will be used.

       -e/--referer <URL>
     (HTTP) Sends the "Referer Page" information to the HTTP  server.
     This  can also be set with the -H/--header flag of course.  When
     used with -L/--location you can append ";auto" to the  --referer
     URL to make curl automatically set the previous URL when it fol-
     lows a Location: header. The ";auto" string can be  used alone,
     even if you don’t set an initial --referer.

     If this option is used several times, the last one will be used.

       --engine <name>
     Select the OpenSSL crypto engine to use for  cipher  operations.
     Use  --engine  list  to  print  a list  of build-time supported
     engines. Note that not all (or  none)  of the  engines  may  be
     available at run-time.

       --environment
     (RISC  OS ONLY) Sets a range of environment variables, using the
     names the -w option supports, to easier allow extraction of use-
     ful information after having run curl.

     If  this option is used several times, each occurrence will tog-
     gle this on/off.

       --egd-file <file>
     (HTTPS) Specify the path name to the  Entropy  Gathering Daemon
     socket.  The  socket  is used to seed the random engine for SSL
     connections. See also the --random-file option.

       -E/--cert <certificate[:password]>
     (HTTPS) Tells curl to use the specified  certificate  file  when
     getting  a  file with HTTPS. The certificate must be in PEM for-
     mat.  If the optional  password  isn’t  specified,  it  will  be
     queried  for  on the terminal. Note that this certificate is the
     private key and the private certificate concatenated!

     If this option is used several times, the last one will be used.

       --cert-type <type>
     (SSL)  Tells curl what certificate type the provided certificate
     is in. PEM, DER and ENG are recognized types.

     If this option is used several times, the last one will be used.

       --cacert <CA certificate>
     (HTTPS) Tells curl to use the specified certificate file to ver-
     ify the peer. The file may contain multiple CA certificates. The
     certificate(s) must be in PEM format.

     curl  recognizes the environment variable named ’CURL_CA_BUNDLE’
     if that is set, and uses the given path as a path to a  CA  cert
     bundle. This option overrides that variable.

     The  windows  version  of curl will automatically look for a CA
     certs file named ´curl-ca-bundle.crt´, either in the same direc-
     tory as curl.exe, or in the Current Working Directory, or in any
     folder along your PATH.

     If this option is used several times, the last one will be used.

       --capath <CA certificate directory>
     (HTTPS) Tells curl to use the specified certificate directory to
     verify the peer. The certificates must be in PEM format, and the
     directory must  have  been processed using the c_rehash utility
     supplied with openssl. Using --capath can allow curl  to  make
     https  connections  much more efficiently than using --cacert if
     the --cacert file contains many CA certificates.

     If this option is used several times, the last one will be used.

       -f/--fail
     (HTTP)  Fail  silently (no output at all) on server errors. This
     is mostly done like this to better enable scripts etc to better
     deal  with  failed  attempts. In normal cases when a HTTP server
     fails to deliver a document, it returns an HTML document stating
     so  (which  often also  describes why and more). This flag will
     prevent curl from outputting that and return error 22.

     If this option is used twice,  the  second  will again  disable
     silent failure.

       --ftp-account [data]
     (FTP) When an FTP server asks for "account data" after user name
     and password has been provided, this data is sent off using  the
     ACCT command. (Added in 7.13.0)

     If  this option is used twice, the second will override the pre-
     vious use.

       --ftp-create-dirs
     (FTP) When an FTP URL/operation uses a path  that doesn’t  cur-
     rently  exist on the server, the standard behavior of curl is to
     fail. Using this option, curl will  instead  attempt  to create
     missing directories.

     If  this option is  used  twice, the second will again disable
     directory creation.

       --ftp-method [method]
     (FTP) Control what method curl should use to reach a file on  a
     FTP(S)  server. The method argument should be one of the follow-
     ing alternatives:

     multicwd
    curl does a single CWD operation for each path  part  in
    the  given URL. For deep hierarchies this means very many
    commands. This is how RFC1738 says it  should  be done.
    This is the default but the slowest behavior.

     nocwd  curl  does no  CWD at all. curl will do SIZE, RETR, STOR
    etc and give a full path to the server for all these com-
    mands. This is the fastest behavior.

     singlecwd
    curl does one CWD with the full target directory and then
    operates on the file "normally"  (like  in the  multicwd
    case).  This  is  somewhat more standards compliant than
    ’nocwd’ but without the full penalty of ’multicwd’.

       --ftp-pasv
     (FTP) Use PASV when transferring. PASV is the  internal  default
     behavior, but using this option can be used to override a previ-
     ous --ftp-port option. (Added in 7.11.0)

     If this option is used several times, the following  occurrences
     make no difference.


       --ftp-alternative-to-user <command>
     (FTP)  If authenticating with the USER and PASS commands fails,
     send this command.   When  connecting  to  Tumbleweed’s Secure
     Transport server over  FTPS  using a client certificate, using
     "SITE AUTH" will tell the server to retrieve the username  from
     the certificate. (Added in 7.15.5)

       --ftp-skip-pasv-ip
     (FTP) Tell curl to not use the IP address the server suggests in
     its response to curl’s PASV command when curl connects the  data
     connection.  Instead  curl  will re-use the same IP address it
     already uses for the control connection. (Added in 7.14.2)

     This option has no effect if PORT, EPRT or EPSV is used  instead
     of PASV.

     If  this option is  used  twice, the second will again use the
     server’s suggested address.

       --ftp-ssl
     (FTP) Try to use SSL/TLS for the FTP connection. Reverts to  a
     non-secure  connection  if  the  server doesn’t support SSL/TLS.
     (Added in 7.11.0)

     If this option is used twice,  the  second  will again  disable
     this.

       --ftp-ssl-reqd
     (FTP)  Require  SSL/TLS  for the FTP connection. Terminates the
     connection if the server doesn’t support SSL/TLS.   (Added  in
     7.15.5)

     If  this option is  used  twice, the second will again disable
     this.

       -F/--form <name=content>
     (HTTP) This lets curl emulate a filled in form in which  a  user
     has  pressed  the submit button. This causes curl to POST data
     using the Content-Type multipart/form-data according to RFC1867.
     This  enables  uploading of binary files etc. To force the ’con-
     tent’ part to be a file, prefix the file name with an @ sign. To
     just get the content part from a file, prefix the file name with
     the letter <. The difference between @ and  <  is then  that  @
     makes  a file  get attached in the post as a file upload, while
     the < makes a text field and just get the contents for that text
     field from a file.

     Example, to send your password file to the server, where ’pass-
     word’ is the name of the form-field to which /etc/passwd will be
     the input:

     curl -F password=@/etc/passwd www.mypasswords.com

     To  read the file’s content from stdin instead of a file, use -
     where the file name should’ve been. This goes for both @ and  <
     constructs.

     You  can also  tell  curl  what Content-Type  to  use by using
     ’type=’, in a manner similar to:

     curl -F "web=@index.html;type=text/html" url.com

     or

     curl -F "name=daniel;type=text/foo" url.com

     You can also explicitly change the name field of an file upload
     part by setting filename=, like this:

     curl -F "file=@localfile;filename=nameinpost" url.com

     See further examples and details in the MANUAL.

     This option can be used multiple times.

       --form-string <name=string>
     (HTTP)  Similar  to  --form except that the value string for the
     named parameter is used literally. Leading ’@’ and  ’<’  charac-
     ters, and the ’;type=’ string in the value have no special mean-
     ing. Use this in preference to --form if there’s any possibility
     that  the string value may accidentally trigger the ’@’ or ’<’
     features of --form.

       -g/--globoff
     This option switches off the "URL globbing parser". When you set
     this  option, you can specify URLs that contain the letters {}[]
     without having them being interpreted by curl itself. Note  that
     these  letters are not normal legal URL contents but they should
     be encoded according to the URI standard.

       -G/--get
     When used,  this option will  make  all data  specified  with
     -d/--data or  --data-binary  to be  used in a HTTP GET request
     instead of the POST request that otherwise would be  used.  The
     data will be appended to the URL with a ’?’  separator.

     If  used in  combination with -I, the POST data will instead be
     appended to the URL with a HEAD request.

     If this option is used several times, the following  occurrences
     make no difference.

       -h/--help
     Usage help.

       -H/--header <header>
     (HTTP)  Extra  header  to use  when getting a web page. You may
     specify any number of extra headers. Note that if you should add
     a custom header that has the same name as one of the internal
     ones curl would use, your externally set header will  be  used
     instead of the internal one. This allows you to make even trick-
     ier stuff than curl would normally do. You  should  not  replace
     internally  set  headers without knowing  perfectly  well what
     you’re doing. Replacing an internal header with one without con-
     tent  on the  right  side of the colon will prevent that header
     from appearing.

     curl will make sure that each header you add/replace  get  sent
     with the proper end of line marker, you should thus not add that
     as a part of the header content: do not add newlines or carriage
     returns they will only mess things up for you.

     See also the -A/--user-agent and -e/--referer options.

     This  option  can be  used multiple times to add/replace/remove
     multiple headers.

       --ignore-content-length
     (HTTP) Ignore the Content-Length header. This  is  particularly
     useful  for servers running Apache 1.x, which will report incor-
     rect Content-Length for files larger than 2 gigabytes.

       -i/--include
     (HTTP) Include the HTTP-header in the  output.  The  HTTP-header
     includes things like  server-name, date of the document, HTTP-
     version and more...

     If this option is used twice,  the  second  will again  disable
     header include.

       --interface <name>
     Perform  an operation using a specified interface. You can enter
     interface name, IP address or host name. An example  could  look
     like:

      curl --interface eth0:1 http://www.netscape.com/

     If this option is used several times, the last one will be used.

       -I/--head
     (HTTP/FTP/FILE) Fetch the HTTP-header only! HTTP-servers feature
     the  command  HEAD which this uses to get nothing but the header
     of a document. When used on a FTP or FILE file, curl  displays
     the file size and last modification time only.

     If  this option is  used  twice, the second will again disable
     header only.

       -j/--junk-session-cookies
     (HTTP) When curl is told to read cookies from a given file, this
     option  will  make  it  discard all "session cookies". This will
     basically have the same effect as if a new session  is  started.
     Typical  browsers always discard  session cookies when they’re
     closed down.

     If this option is used several times, each occurrence will  tog-
     gle this on/off.

       -k/--insecure
     (SSL)  This  option explicitly allows curl to perform "insecure"
     SSL connections and transfers. All SSL connections are attempted
     to  be  made secure by using the CA certificate bundle installed
     by default. This makes all connections considered "insecure"  to
     fail unless -k/--insecure is used.

     If this option is used twice, the second time will again disable
     it.

       --key <key>
     (SSL) Private key file name. Allows you to provide your  private
     key in this separate file.

     If this option is used several times, the last one will be used.

       --key-type <type>
     (SSL) Private key file type. Specify which type your --key  pro-
     vided private key is. DER, PEM and ENG are supported.

     If this option is used several times, the last one will be used.

       --krb4 <level>
     (FTP) Enable kerberos4 authentication and use. The level must be
     entered  and should be one of ’clear’, ’safe’, ’confidential’ or
     ’private’. Should you use a level that  is  not  one  of these,
     ’private’ will instead be used.

     This  option  requires that the library was built with kerberos4
     support. This is not very common. Use  -V/--version  to  see  if
     your curl supports it.

     If this option is used several times, the last one will be used.

       -K/--config <config file>
     Specify which config file to read curl arguments from. The  con-
     fig  file is a text file in which command line arguments can be
     written which then will be used as if they were written  on  the
     actual command line. Options and their parameters must be speci-
     fied on the same config file line. If the parameter is  to  con-
     tain white spaces, the parameter must be enclosed within quotes.
     If the first column of a config line is  a  ’#’  character,  the
     rest of the line will be treated as a comment.

     Specify  the  filename  as  ’-’  to make curl read the file from
     stdin.

     Note that to be able to specify a URL in the  config  file,  you
     need  to specify it  using the --url option, and not by simply
     writing the URL on its own line. So, it could  look  similar  to
     this:

     url = "http://curl.haxx.se/docs/"

     This option can be used multiple times.

     When curl is invoked, it always (unless -q is used) checks for a
     default config file and uses it if  found.  The  default config
     file is checked for in the following places in this order:

     1)  curl tries  to find the "home dir": It first checks for the
     CURL_HOME and then the HOME environment variables. Failing that,
     it  uses getpwuid() on unix-like systems (which returns the home
     dir given the current user in your system). On Windows, it  then
     checks for the APPDATA variable, or as a last resort the ’%USER-
     PROFILE%0lication Data’.

     2) On windows, if there is no _curlrc file in the home  dir,  it
     checks for one in the same dir the executable curl is placed. On
     unix-like systems, it will simply try to load .curlrc  from  the
     determined home dir.

       --limit-rate <speed>
     Specify  the  maximum  transfer  rate you want curl to use. This
     feature is useful if you have a limited pipe and you’d like your
     transfer not use your entire bandwidth.

     The  given speed is measured in bytes/second, unless a suffix is
     appended. Appending ’k’ or ’K’ will count the number  as kilo-
     bytes,  ’m’  or  M’ makes it megabytes while ’g’ or ’G’ makes it
     gigabytes. Examples: 200K, 3m and 1G.

     If you are also using the -Y/--speed-limit option,  that option
     will   take  precedence  and  might  cripple  the rate-limiting
     slightly, to help keeping the speed-limit logic working.

     If this option is used several times, the last one will be used.

       -l/--list-only
     (FTP)  When listing an FTP directory, this switch forces a name-
     only view.  Especially useful if you want to  machine-parse  the
     contents of  an FTP  directory since the normal directory view
     doesn’t use a standard look or format.

     This option causes an FTP NLST command to be  sent.   Some  FTP
     servers  list  only files in their response to NLST; they do not
     include subdirectories and symbolic links.

     If this option is used twice, the second will again disable list
     only.

       --local-port <num>[-num]
     Set  a prefered number or range of local port numbers to use for
     the connection(s).  Note that port numbers by nature is a scarce
     resource that  will  be busy at times so setting this range to
     something too narrow might cause unnecessary  connection setup
     failures. (Added in 7.15.2)

       -L/--location
     (HTTP/HTTPS)  If the server reports that the requested page has
     moved to a different location (indicated with a Location: header
     and  a  3XX  response  code) this option will make curl redo the
     request on the new place. If used together with -i/--include  or
     -I/--head,  headers from all requested pages will be shown. When
     authentication is used, curl only sends its credentials  to  the
     initial  host.  If a redirect takes curl to a different host, it
     won’t be able to intercept the user+password. See also  --loca-
     tion-trusted  on how to change this. You can limit the amount of
     redirects to follow by using the --max-redirs option.

     If this option is used twice,  the  second  will again  disable
     location following.

       --location-trusted
     (HTTP/HTTPS) Like -L/--location, but will allow sending the name
     + password to all hosts that the site may redirect to. This  may
     or may not introduce a security breach if the site redirects you
     do a site to which you’ll send your authentication  info (which
     is plaintext in the case of HTTP Basic authentication).

     If  this option is  used  twice, the second will again disable
     location following.

       --max-filesize <bytes>
     Specify the maximum size (in bytes) of a file  to download.  If
     the  file requested is larger than this value, the transfer will
     not start and curl will return with exit code 63.

     NOTE: The file size is not always known prior to download,  and
     for such files this option has no effect even if the file trans-
     fer ends up being larger than this given limit. This  concerns
     both FTP and HTTP transfers.

       -m/--max-time <seconds>
     Maximum  time  in seconds that you allow the whole operation to
     take.  This is useful for preventing your batch jobs from hang-
     ing  for hours  due  to slow networks or links going down.  See
     also the --connect-timeout option.

     If this option is used several times, the last one will be used.

       -M/--manual
     Manual. Display the huge help text.

       -n/--netrc
     Makes curl scan the .netrc file in the user’s home directory for
     login name and password. This is typically used for ftp on unix.
     If  used with  http,  curl will enable user authentication. See
     netrc(4) or ftp(1) for details on the file format. Curl will not
     complain if  that  file hasn’t the right permissions (it should
     not be world  nor group readable).  The environment  variable
     "HOME" is used to find the home directory.

     A quick and  very  simple  example of how to setup a .netrc to
     allow curl to ftp to the machine host.domain.com with user  name
     ’myself’ and password ’secret’ should look similar to:

     machine host.domain.com login myself password secret

     If  this option is  used  twice, the second will again disable
     netrc usage.

       --netrc-optional
     Very similar to --netrc, but this option makes the .netrc usage
     optional and not mandatory as the --netrc does.

       --negotiate
     (HTTP)  Enables  GSS-Negotiate authentication. The GSS-Negotiate
     method was designed by Microsoft and is used in their web appli-
     cations. It  is primarily  meant  as  a support for Kerberos5
     authentication but may be also used along with another authenti-
     cation  methods. For  more  information see  IETF draft draft-
     brezak-spnego-http-04.txt.

     This option requires that the library was built with GSSAPI sup-
     port.  This  is not very common. Use -V/--version to see if your
     version supports GSS-Negotiate.

     When using this option, you must also provide a  fake  -u/--user
     option  to  activate the authentication code properly. Sending a
     ’-u :’ is enough as the user  name  and  password from  the  -u
     option aren’t actually used.

     If  this option is used several times, the following occurrences
     make no difference.

       -N/--no-buffer
     Disables the buffering of the output stream. In normal work sit-
     uations, curl  will  use a standard buffered output stream that
     will have the effect that it will output the data in chunks, not
     necessarily  exactly  when  the data arrives.  Using this option
     will disable that buffering.

     If this option is used twice, the second will  again  switch  on
     buffering.

       --ntlm (HTTP)  Enables  NTLM  authentication.  The  NTLM authentication
     method was designed by Microsoft and is used by IIS web servers.
     It is a proprietary protocol, reversed engineered by clever peo-
     ple and implemented in curl based on their efforts. This kind of
     behavior should not be endorsed, you should encourage everyone
     who uses NTLM to switch to a public and  documented  authentica-
     tion method instead. Such as Digest.

     If  you  want to enable NTLM for your proxy authentication, then
     use --proxy-ntlm.

     This option requires that the library was built  with  SSL  sup-
     port. Use -V/--version to see if your curl supports NTLM.

     If  this option is used several times, the following occurrences
     make no difference.

       -o/--output <file>
     Write output to <file> instead of stdout. If you are using {} or
     []  to  fetch  multiple documents, you can use ’#’ followed by a
     number in the <file> specifier. That variable will  be  replaced
     with the current string for the URL being fetched. Like in:

curl http://{one,two}.site.com -o "file_#1.txt"

     or use several variables like:

curl http://{site,host}.host[1-5].com -o "#1_#2"

     You  may use  this  option  as many times as you have number of
     URLs.

     See also the --create-dirs option to create the  local  directo-
     ries dynamically.

       -O/--remote-name
     Write  output to a local file named like the remote file we get.
     (Only the file part of the remote file is used, the path is  cut
     off.)

     The  remote  file name  to use for saving is extracted from the
     given URL, nothing else.

     You may use this option as many times  as you  have  number  of
     URLs.

       --pass <phrase>
     (SSL) Pass phrase for the private key

     If this option is used several times, the last one will be used.

       --proxy-anyauth
     Tells curl to pick a suitable authentication method when commu-
     nicating with  the  given  proxy.  This will  cause  an extra
     request/response round-trip. (Added in 7.13.2)

     If this option is used twice, the second will again disable  the
     proxy use-any authentication.

       --proxy-basic
     Tells  curl  to use HTTP Basic authentication when communicating
     with the given proxy. Use --basic for enabling HTTP Basic with a
     remote  host.  Basic  is the default authentication method curl
     uses with proxies.

     If this option is used twice,  the  second  will again  disable
     proxy HTTP Basic authentication.

       --proxy-digest
     Tells  curl to use HTTP Digest authentication when communicating
     with the given proxy. Use --digest for enabling HTTP Digest with
     a remote host.

     If  this option is  used  twice, the second will again disable
     proxy HTTP Digest.

       --proxy-ntlm
     Tells curl to use HTTP NTLM  authentication  when communicating
     with the given proxy. Use --ntlm for enabling NTLM with a remote
     host.

     If this option is used twice,  the  second  will again  disable
     proxy HTTP NTLM.

       -p/--proxytunnel
     When  an HTTP proxy is used (-x/--proxy), this option will cause
     non-HTTP protocols  to  attempt  to  tunnel  through  the proxy
     instead  of merely using it to do HTTP-like operations. The tun-
     nel approach is made with the HTTP  proxy CONNECT  request  and
     requires that the proxy allows direct connect to the remote port
     number curl wants to tunnel through to.

     If this option is used twice,  the  second  will again  disable
     proxy tunnel.

       -P/--ftp-port <address>
     (FTP) Reverses the initiator/listener roles when connecting with
     ftp. This switch makes Curl use  the  PORT  command  instead  of
     PASV.  In practice,  PORT  tells the  server to connect to the
     client’s specified address and port, while PASV asks the server
     for  an  ip  address and port to connect to. <address> should be
     one of:

     interface
    i.e "eth0" to specify which interface’s  IP  address  you
    want to use  (Unix only)

     IP address
    i.e "192.168.10.1" to specify exact IP number

     host name
    i.e "my.host.domain" to specify machine

     -     make  curl pick the same IP address that is already used
    for the control connection

       If this option is used several times, the last one will be  used.  Dis-
       able  the  use  of PORT with --ftp-pasv. Disable the attempt to use the
       EPRT command instead of PORT by using --disable-eprt.  EPRT  is really
       PORT++.

       -q     If  used as the first parameter on the command line, the curlrc
     config file will not be read and used. See the  -K/--config  for
     details on the default config file search path.

       -Q/--quote <command>
     (FTP)  Send an arbitrary command to the remote FTP server. Quote
     commands are sent BEFORE the  transfer  is  taking  place (just
     after  the  initial  PWD command to be exact). To make commands
     take place after a successful transfer, prefix them with a  dash
     ’-’. To make commands get sent after libcurl has changed working
     directory, just before the transfer command(s), prefix the  com-
     mand  with  ’+’. You may specify any amount of commands. If the
     server returns failure for one of the commands, the entire oper-
     ation  will  be aborted. You must send syntactically correct FTP
     commands as RFC959 defines.

     This option can be used multiple times.

       --random-file <file>
     (HTTPS) Specify the path name to file containing what  will  be
     considered  as  random data. The data is used to seed the random
     engine for SSL connections.  See also the --egd-file option.

       -r/--range <range>
     (HTTP/FTP) Retrieve a byte range (i.e a partial document) from a
     HTTP/1.1 or  FTP server. Ranges can be specified in a number of
     ways.

     0-499 specifies the first 500 bytes

     500-999 specifies the second 500 bytes

     -500 specifies the last 500 bytes

     9500- specifies the bytes from offset 9500 and forward

     0-0,-1 specifies the first and last byte only(*)(H)

     500-700,600-799
specifies 300 bytes from offset 500(H)

     100-199,500-599
specifies two separate 100 bytes ranges(*)(H)

       (*) = NOTE that this will cause the server to reply  with  a  multipart
       response!

       You  should  also  be aware that many HTTP/1.1 servers do not have this
       feature enabled, so that when  you  attempt  to get  a range, you’ll
       instead get the whole document.

       FTP  range  downloads  only  support  the  simple  syntax  ’start-stop’
       (optionally with one of the numbers omitted). It depends on the non-RFC
       command SIZE.

       If this option is used several times, the last one will be used.

       -R/--remote-time
     When  used,  this will  make  libcurl attempt to figure out the
     timestamp of the remote file, and if that is available make  the
     local file get that same timestamp.

     If  this option is  used  twice, the second time disables this
     again.

       --retry <num>
     If a transient error is returned when curl tries to  perform  a
     transfer, it  will retry this number of times before giving up.
     Setting the number to 0 makes curl do no retries (which  is  the
     default). Transient  error  means either: a timeout, an FTP 5xx
     response code or an HTTP 5xx response code.

     When curl is about to retry a transfer, it will first  wait  one
     second  and  then for all forthcoming retries it will double the
     waiting time until it reaches 10 minutes which then will be  the
     delay  between  the rest of the retries. By using --retry-delay
     you  disable  this  exponential  backoff algorithm.  See  also
     --retry-max-time to  limit  the total time allowed for retries.
     (Added in 7.12.3)

     If this option is used  multiple times, the  last  occurrence
     decide the amount.

       --retry-delay <seconds>
     Make  curl  sleep this amount of time between each retry when a
     transfer has failed with a  transient  error  (it  changes  the
     default  backoff time algorithm between retries). This option is
     only interesting if --retry is also used. Setting this delay  to
     zero  will  make curl  use the default backoff time.  (Added in
     7.12.3)

     If this option is used  multiple times, the  last  occurrence
     decide the amount.

       --retry-max-time <seconds>
     The  retry  timer is  reset  before the first transfer attempt.
     Retries will be done as usual (see --retry) as long as the timer
     hasn’t reached this given limit. Notice that if the timer hasn’t
     reached the limit, the request will be made and  while  perform-
     ing,  it may take longer than this given time period. To limit a
     single request´s maximum time,  use  -m/--max-time.   Set  this
     option to zero to not timeout retries. (Added in 7.12.3)

     If  this option is  used  multiple  times, the last occurrence
     decide the amount.

       -s/--silent
     Silent mode. Don’t show progress meter or error messages. Makes
     Curl mute.

     If  this option is  used  twice, the second will again disable
     silent mode.

       -S/--show-error
     When used with -s it makes curl show error message if it fails.

     If this option is used twice, the second will again disable show
     error.

       --socks4 <host[:port]>
     Use the specified SOCKS4 proxy. If the port number is not speci-
     fied, it is assumed at port 1080. (Added in 7.15.2)

     This  option  overrides  any previous use of -x/--proxy, as they
     are mutually exclusive.

     If this option is used several times, the last one will be used.

       --socks5 <host[:port]>
     Use the specified SOCKS5 proxy. If the port number is not speci-
     fied, it is assumed at port 1080. (Added in 7.11.1)

     This option overrides any previous use of -x/--proxy,  as  they
     are mutually exclusive.

     If this option is used several times, the last one will be used.
     (This option was previously  wrongly  documented and  used  as
     --socks without the number appended.)

     This  option (as well as --socks4) does not work with IPv6, FTPS
     or LDAP.

       --stderr <file>
     Redirect all writes to stderr to the specified file instead.  If
     the  file name is a plain ’-’, it is instead written to stdout.
     This option has no point when you’re using a shell  with decent
     redirecting capabilities.

     If this option is used several times, the last one will be used.

       --tcp-nodelay
     Turn on the TCP_NODELAY option. See the curl_easy_setopt(3)  man
     page for details about this option. (Added in 7.11.2)

     If  this option is used several times, each occurrence toggles
     this on/off.

       -t/--telnet-option <OPT=val>
     Pass options to the telnet protocol. Supported options are:

     TTYPE=<term> Sets the terminal type.

     XDISPLOC=<X display> Sets the X display location.

     NEW_ENV=<var,val> Sets an environment variable.

       -T/--upload-file <file>
     This transfers the specified local file to the  remote  URL.  If
     there is no file part in the specified URL, Curl will append the
     local file name. NOTE that you must use a trailing / on the last
     directory to really prove to Curl that there is no file name or
     curl will think that your last directory name is the remote file
     name to use. That will most likely cause the upload operation to
     fail. If this is used on a http(s) server, the PUT command  will
     be used.

     Use  the file name "-" (a single dash) to use stdin instead of a
     given file.

     You can specify one -T for each URL on the command line. Each -T
     + URL pair specifies what to upload and to where. curl also sup-
     ports "globbing" of the -T argument, meaning that you can upload
     multiple files  to  a single URL by using the same URL globbing
     style supported in the URL, like this:

     curl -T "{file1,file2}" http://www.uploadtothissite.com

     or even

     curl -T "img[1-1000].png" ftp://ftp.picturemania.com/upload/

       --trace <file>
     Enables a full trace dump of all incoming  and  outgoing data,
     including descriptive information, to the given output file. Use
     "-" as filename to have the output sent to stdout.

     If this option is used several times, the last one will be used.

       --trace-ascii <file>
     Enables  a  full trace  dump of all incoming and outgoing data,
     including descriptive information, to the given output file. Use
     "-" as filename to have the output sent to stdout.

     This is very similar to --trace, but leaves out the hex part and
     only shows the ASCII part of the dump. It makes  smaller output
     that might be easier to read for untrained humans.

     If this option is used several times, the last one will be used.

       --trace-time
     Prepends a time stamp to each trace or verbose  line  that  curl
     displays. (Added in 7.14.0)

     If  this option is used several times, each occurrence will tog-
     gle it on/off.

       -u/--user <user:password>
     Specify user and password to  use  for  server  authentication.
     Overrides -n/--netrc and --netrc-optional.

     If  you  use  an SSPI-enabled curl binary and do NTLM autentica-
     tion, you can force curl to pick up the user name and  password
     from  your  environment by simply specifying a single colon with
     this option: "-u :".

     If this option is used several times, the last one will be used.

       -U/--proxy-user <user:password>
     Specify user and password to use for proxy authentication.

     If  you  use  an SSPI-enabled curl binary and do NTLM autentica-
     tion, you can force curl to pick up the user name and  password
     from  your  environment by simply specifying a single colon with
     this option: "-U :".

     If this option is used several times, the last one will be used.

       --url <URL>
     Specify  a  URL  to  fetch. This option is mostly handy when you
     want to specify URL(s) in a config file.

     This option may be used any number of times.  To control where
     this URL is written, use the -o/--output or the -O/--remote-name
     options.

       -v/--verbose
     Makes the fetching more  verbose/talkative.  Mostly  usable  for
     debugging.  Lines starting with ’>’ means "header data" sent by
     curl, ’<’ means "header data" received by curl that is hidden in
     normal  cases  and lines starting with ’*’ means additional info
     provided by curl.

     Note  that  if  you  only want  HTTP  headers  in  the  output,
     -i/--include might be option you’re looking for.

     If  you think this option still doesn’t give you enough details,
     consider using --trace or --trace-ascii instead.

     If this option is used twice, the second will again disable ver-
     bose.

       -V/--version
     Displays information about curl and the libcurl version it uses.

     The first line includes the full version of  curl,  libcurl  and
     other 3rd party libraries linked with the executable.

     The  second  line (starts with "Protocols:") shows all protocols
     that libcurl reports to support.

     The third line (starts with "Features:") shows specific features
     libcurl reports to offer. Available features include:

     IPv6   You can use IPv6 with this.

     krb4   Krb4 for ftp is supported.

     SSL    HTTPS and FTPS are supported.

     libz   Automatic decompression of compressed files over HTTP is
    supported.

     NTLM   NTLM authentication is supported.

     GSS-Negotiate
    Negotiate authentication is supported.

     Debug  This curl uses a libcurl built with Debug. This  enables
    more  error-tracking  and memory debugging etc. For curl-
    developers only!

     AsynchDNS
    This curl uses asynchronous name resolves.

     SPNEGO SPNEGO Negotiate authentication is supported.

     Largefile
    This curl supports transfers of large files, files larger
    than 2GB.

     IDN    This curl supports IDN - international domain names.

     SSPI   SSPI  is  supported. If you use NTLM and set a blank user
    name, curl will authenticate with your current  user  and
    password.

       -w/--write-out <format>
     Defines what to display on stdout after a completed and success-
     ful operation. The format is a string  that  may contain plain
     text mixed with any number of variables. The string can be spec-
     ified as "string", to get read from a particular file you spec-
     ify  it  "@filename"  and to  tell curl to read the format from
     stdin you write "@-".

     The variables present in the output format will  be  substituted
     by  the  value or text that curl thinks fit, as described below.
     All variables are specified like %{variable_name} and to output
     a normal % you just write them like %%. You can output a newline
     by using \n, a carriage return with \r and a tab space with  \t.

     NOTE: The %-letter is a special letter in the win32-environment,
     where all occurrences of %  must be  doubled  when  using  this
     option.

     Available variables are at this point:

     url_effective  The  URL  that  was  fetched last. This is mostly
    meaningful if you’ve told curl  to follow loca-
    tion: headers.

     http_code     The  numerical  code  that was found in the last
    retrieved HTTP(S) page.

     http_connect   The numerical code that was  found in  the  last
    response (from  a  proxy)  to  a curl  CONNECT
    request. (Added in 7.12.4)

     time_total     The total time, in seconds, that the full opera-
    tion lasted. The time will be displayed with mil-
    lisecond resolution.

     time_namelookup
    The time, in seconds,  it took  from  the start
    until the name resolving was completed.

     time_connect   The  time, in  seconds,  it  took from the start
    until the connect to the remote host  (or proxy)
    was completed.

     time_pretransfer
    The  time, in  seconds,  it  took from the start
    until the file transfer is just about  to begin.
    This includes all pre-transfer commands and nego-
    tiations that are specific to the particular pro-
    tocol(s) involved.

     time_redirect  The time, in seconds, it took for all redirection
    steps include name lookup, connect,  pretransfer
    and   transfer   before   final  transaction  was
    started. time_redirect shows the complete execu-
    tion  time for  multiple redirections. (Added in
    7.12.3)

     time_starttransfer
    The time, in seconds,  it took  from  the start
    until  the first byte is just about to be trans-
    ferred. This includes time_pretransfer  and  also
    the  time the  server  needs  to calculate  the
    result.

     size_download  The total amount of bytes that were downloaded.

     size_upload    The total amount of bytes that were uploaded.

     size_header    The total amount of bytes of the downloaded head-
    ers.

     size_request   The  total amount of bytes that were sent in the
    HTTP request.

     speed_download The average download speed that curl measured for
    the complete download.

     speed_upload   The  average  upload speed that curl measured for
    the complete upload.

     content_type   The Content-Type of the  requested document,  if
    there was any.

     num_connects   Number  of new connects made in the recent trans-
    fer. (Added in 7.12.3)

     num_redirects  Number of redirects that  were  followed  in  the
    request. (Added in 7.12.3)

     ftp_entry_path The initial path libcurl ended up in when logging
    on to the remote FTP server. (Added in 7.15.4)

       If this option is used several times, the last one will be used.

       -x/--proxy <proxyhost[:port]>
     Use specified HTTP proxy. If the port number is  not  specified,
     it is assumed at port 1080.

     This  option  overrides existing environment variables that sets
     proxy to use. If there’s an  environment  variable  setting  a
     proxy, you can set proxy to "" to override it.

     Note  that  all  operations that are performed over a HTTP proxy
     will transparently be converted to HTTP. It means that  certain
     protocol specific operations might not be available. This is not
     the case if you can tunnel through the proxy, as done  with  the
     -p/--proxytunnel option.

     Starting with 7.14.1, the proxy host can be specified the exact
     same way as the proxy environment variables,  include  protocol
     prefix (http://) and embedded user + password.

     If this option is used several times, the last one will be used.

       -X/--request <command>
     (HTTP) Specifies a custom request method to use when communicat-
     ing  with the  HTTP server.  The specified request will be used
     instead of the method otherwise used (which  defaults  to GET).
     Read the HTTP 1.1 specification for details and explanations.

     (FTP) Specifies a custom FTP command to use instead of LIST when
     doing file lists with ftp.

     If this option is used several times, the last one will be used.

       -y/--speed-time <time>
     If a download is slower than speed-limit bytes per second during
     a speed-time period, the download gets aborted. If speed-time is
     used, the default speed-limit will be 1 unless set with -y.

     This  option  controls  transfers and thus will not affect slow
     connects etc. If this is a concern for you, try  the  --connect-
     timeout option.

     If this option is used several times, the last one will be used.

       -Y/--speed-limit <speed>
     If a download is slower than this given speed, in bytes per sec-
     ond,  for speed-time seconds it gets aborted. speed-time is set
     with -Y and is 30 if not set.

     If this option is used several times, the last one will be used.

       -z/--time-cond <date expression>
     (HTTP)  Request  a  file that  has been modified later than the
     given time and date, or one that has been modified  before  that
     time. The date expression can be all sorts of date strings or if
     it doesn’t match any internal ones, it tries  to get  the  time
     from  a  given  file  name  instead! See the curl_getdate(3) man
     pages for date expression details.

     Start the date expression with a dash (-) to make it request for
     a document that is older than the given date/time, default is a
     document that is newer than the specified date/time.

     If this option is used several times, the last one will be used.

       --max-redirs <num>
     Set   maximum   number  of  redirection-followings  allowed.  If
     -L/--location is used, this option can be used to prevent  curl
     from following redirections "in absurdum". By default, the limit
     is set to 50 redirections. Set this option to -1 to make it lim-
     itless.

     If this option is used several times, the last one will be used.

       -0/--http1.0
     (HTTP) Forces curl to issue its requests using HTTP 1.0  instead
     of using its internally preferred: HTTP 1.1.

       -1/--tlsv1
     (HTTPS) Forces curl to use TSL version 1 when negotiating with a
     remote TLS server.

       -2/--sslv2
     (HTTPS) Forces curl to use SSL version 2 when negotiating with a
     remote SSL server.

       -3/--sslv3
     (HTTPS) Forces curl to use SSL version 3 when negotiating with a
     remote SSL server.

       --3p-quote
     (FTP) Specify arbitrary commands to send to the  source  server.
     See the -Q/--quote option for details. (Added in 7.13.0)

       --3p-url
     (FTP)  Activates a FTP 3rd party transfer. Specifies the source
     URL to get a file from, while the "normal" URL will be  used  as
     target URL, the file that will be written/created.

     Note  that  not all FTP server allow 3rd party transfers. (Added
     in 7.13.0)

       --3p-user
     (FTP) Specify user:password for the source URL transfer. (Added
     in 7.13.0)

       -4/--ipv4
     If  libcurl  is  capable of resolving an address to multiple IP
     versions (which it is if it is ipv6-capable), this option tells
     libcurl to resolve names to IPv4 addresses only.

       -6/--ipv6
     If  libcurl  is  capable of resolving an address to multiple IP
     versions (which it is if it is ipv6-capable), this option tells
     libcurl to resolve names to IPv6 addresses only.

       -#/--progress-bar
     Make curl display progress information as a progress bar instead
     of the default statistics.

     If this option is used twice, the second will again disable  the
     progress bar.

FILES
       ~/.curlrc
     Default config file, see -K/--config for details.


ENVIRONMENT
       http_proxy [protocol://]<host>[:port]
     Sets proxy server to use for HTTP.

       HTTPS_PROXY [protocol://]<host>[:port]
     Sets proxy server to use for HTTPS.

       FTP_PROXY [protocol://]<host>[:port]
     Sets proxy server to use for FTP.

       ALL_PROXY [protocol://]<host>[:port]
     Sets proxy server to use if no protocol-specific proxy is set.

       NO_PROXY <comma-separated list of hosts>
     list  of host names that shouldn’t go through any proxy. If set
     to a asterisk ’*’ only, it matches all hosts.

EXIT CODES
       There exists a bunch of different error codes and  their corresponding
       error  messages that  may appear during bad conditions. At the time of
       this writing, the exit codes are:

       1      Unsupported protocol. This build of curl has no support for this
     protocol.

       2      Failed to initialize.

       3      URL malformat. The syntax was not correct.

       4      URL  user malformatted. The user-part of the URL syntax was not
     correct.

       5      Couldn’t resolve proxy.  The  given  proxy  host could  not  be
     resolved.

       6      Couldn’t resolve host. The given remote host was not resolved.

       7      Failed to connect to host.

       8      FTP  weird  server  reply.  The  server  sent data curl couldn’t
     parse.

       9      FTP access denied. The server denied login or denied  access  to
     the  particular  resource or directory you wanted to reach. Most
     often you tried to change to a directory that doesn’t  exist  on
     the server.

       10     FTP  user/password  incorrect.  Either  one  or  both  were  not
     accepted by the server.

       11     FTP weird PASS reply. Curl couldn’t parse the reply sent to  the
     PASS request.

       12     FTP  weird USER reply. Curl couldn’t parse the reply sent to the
     USER request.

       13     FTP weird PASV reply, Curl couldn’t parse the reply sent to  the
     PASV request.

       14     FTP  weird  227  format. Curl  couldn’t parse the 227-line the
     server sent.

       15     FTP can’t get host. Couldn’t resolve the host IP we got  in  the
     227-line.

       16     FTP  can’t reconnect. Couldn’t connect to the host we got in the
     227-line.

       17     FTP couldn’t set binary. Couldn’t  change  transfer  method  to
     binary.

       18     Partial file. Only a part of the file was transferred.

       19     FTP  couldn’t download/access the given file, the RETR (or simi-
     lar) command failed.

       20     FTP write error. The transfer was reported bad by the server.

       21     FTP quote error. A quote command returned error from the server.

       22     HTTP  page  not  retrieved.  The requested url was not found or
     returned another error with the HTTP error  code being  400  or
     above. This return code only appears if -f/--fail is used.

       23     Write  error.  Curl couldn’t write data to a local filesystem or
     similar.

       24     Malformed user. User name badly specified.

       25     FTP couldn’t STOR file. The server denied the  STOR  operation,
     used for FTP uploading.

       26     Read error. Various reading problems.

       27     Out of memory. A memory allocation request failed.

       28     Operation timeout.  The specified  time-out period was reached
     according to the conditions.

       29     FTP couldn’t set ASCII. The server returned an unknown reply.

       30     FTP PORT failed. The PORT command failed. Not  all  FTP  servers
     support  the  PORT  command,  try doing a  transfer using PASV
     instead!

       31     FTP couldn’t use REST. The REST command failed. This command  is
     used for resumed FTP transfers.

       32     FTP  couldn’t  use SIZE. The SIZE command failed. The command is
     an extension to the original FTP spec RFC 959.

       33     HTTP range error. The range "command" didn’t work.

       34     HTTP post error. Internal post-request generation error.

       35     SSL connect error. The SSL handshaking failed.

       36     FTP bad download resume. Couldn’t continue  an  earlier  aborted
     download.

       37     FILE couldn’t read file. Failed to open the file. Permissions?

       38     LDAP cannot bind. LDAP bind operation failed.

       39     LDAP search failed.

       40     Library not found. The LDAP library was not found.

       41     Function not found. A required LDAP function was not found.

       42     Aborted by callback. An application told curl to abort the oper-
     ation.

       43     Internal error. A function was called with a bad parameter.

       44     Internal error. A function was called in a bad order.

       45     Interface error. A specified outgoing  interface could  not  be
     used.

       46     Bad  password  entered.  An error was signaled when the password
     was entered.

       47     Too many redirects. When following redirects, curl hit the maxi-
     mum amount.

       48     Unknown TELNET option specified.

       49     Malformed telnet option.

       51     The remote peer’s SSL certificate wasn’t ok

       52     The  server  didn’t  reply anything, which here is considered an
     error.

       53     SSL crypto engine not found

       54     Cannot set SSL crypto engine as default

       55     Failed sending network data

       56     Failure in receiving network data

       57     Share is in use (internal error)

       58     Problem with the local certificate

       59     Couldn’t use specified SSL cipher

       60     Problem with the CA cert (path? permission?)

       61     Unrecognized transfer encoding

       62     Invalid LDAP URL

       63     Maximum file size exceeded

       64     Requested FTP SSL level failed

       65     Sending the data requires a rewind that failed

       66     Failed to initialise SSL Engine

       67     User, password or similar was not accepted and  curl  failed  to
     login

       68     File not found on TFTP server

       69     Permission problem on TFTP server

       70     Out of disk space on TFTP server

       71     Illegal TFTP operation

       72     Unknown TFTP transfer ID

       73     File already exists (TFTP)

       74     No such user (TFTP)

       75     Character conversion failed

       76     Character conversion functions required

       XX     There  will appear more error codes here in future releases. The
     existing ones are meant to never change.

AUTHORS / CONTRIBUTORS
       Daniel Stenberg is the main author, but the whole list of  contributors
       is found in the separate THANKS file.

WWW
       http://curl.haxx.se

FTP
       ftp://ftp.sunet.se/pub/www/utilities/curl/

SEE ALSO
       ftp(1), wget(1)

Curl 7.15.4  21 Mar 2006       curl(1)

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