A detailed description of the Linux Curl command, as well as examples

Linux curl is a file transfer tool that works under the command line using URL Rules. It supports file uploads and downloads, so it is a comprehensive transfer tool, but traditionally, the URL is used as a download Tool.

a, Curl Command parameters, There are many I have not used, do not know whether the translation is right, if the wrong place, please correct Me.

-a/--append when uploading a file, attach to target file-a/--user-agent <string>  set user agent to send to server-anyauth   can use "any" authentication method-b/-- Cookie <name=string/file> cookie string or file read Location-basic uses HTTP basic authentication-b/--use-ascii using Ascii/text Transfer-c/--cookie-jar < File> write the cookie to this file after the operation is Finished-c/--continue-at <offset>  breakpoint Continuation-d/--data <data>   HTTP Post Data Transfer--data-ascii <data>  post data in Ascii--data-binary <data> post data in binary mode--negotiate      using HTTP authentication--digest        to use digital authentication--disable-eprt  Prohibit use of EPRT or lprt--disable-epsv  disable the use of Epsv-d/--dump-header <file> write header information to the File--egd-file <file> Set EGD socket path for random data (SSL)--tcp-nodelay   use tcp_nodelay option-e/--referer source Url-e/--cert <cert[:p asswd]> Client certificate file and password (ssl)--cert-type <type> certificate file type (der/pem/eng) (ssl)--key <key>     private key file name ( Ssl)--key-type <type> private key file type (der/pem/eng) (ssl)--pass  <pass>  private Key Password (ssl)--engine <eng>  encryption engine use (ssl). "--engine list" for List--cacert <file> CA certificate (SSL)--capath <directory> CA directory (made using c_rehash) to verify Peer against (ssl)--ciphers <list>  SSL password--compressed    requirements Return is a compressed situation (using deflate or gzip)-- Connect-timeout <seconds> Set maximum request time--create-dirs   establish a directory hierarchy of local directories--crlf           upload is to convert LF into crlf-f/--fail          HTTP error not displayed when connection Fails--ftp-create-dirs if remote directory does not exist, create remote Directory--ftp-method [multicwd/nocwd/singlecwd] control the use of cwd--ftp-pasv       Ignore this IP address when using PASV/EPSV instead of PORT--FTP-SKIP-PASV-IP to use PASV--ftp-ssl        attempt to use SSL/TLS for FTP data transfer--ftp-ssl-reqd  requires SSL/TLS for FTP data transfer-f/--form <name=content> Simulate HTTP form submission data-form-string <name=string> simulate HTTP form submission data-g/--globoff disable URL sequence and range use {} and []-g/--get to send data in a get way-h/-- Help-h/--heAder <line> Custom header information is passed to the server--ignore-content-length  the length of the HTTP header information that is Ignored-i/--include output includes protocol header Information-i/--head   Show only document information read from File-j/--junk-session-cookies ignore session cookie-interface <interface> Specify network interface/address USAGE-KRB4 < level > Enable with the specified security level krb4-j/--junk-session-cookies read file into ignore session Cookie--interface <interface> use specified network Interface/address--krb4 < level>  using a specified security level of Krb4-k/--insecure allows the specified configuration file to be read-l/--list-only list the file name under the FTP directory without using the certificate to the SSL site-k/--config - Limit-rate <rate> Set Transfer speed--local-port<num> Force local port number-m/--max-time <seconds> set Maximum transfer time--max-redirs <num> set the maximum number of directories to Read--max-filesize <bytes> set the maximum amount of files downloaded-m/--manual  display full MANUAL-N/--NETRC read the user name and password from the NETRC file-- Netrc-optional use the. netrc or URL to overwrite-n--ntlm          use HTTP NTLM authentication-n/- -no-buffer Disable Buffered Output-o/--output writes the output to the File-o/--remote-name writes the output to the file, retains the file name of the remote files-p/--proxytunnel   uses the HTTP proxy-- Proxy-anyauth Select either proxy authentication method--proxy-basic   use Basic authentication on the Proxy--proxy-digest  uses the digital authentication on the proxy--proxy-ntlm    uses NTLM authentication on the Proxy-p/--ftp-port <address> uses the port address, Instead of using pasv-q/--quote <cmd> file transfer, Send command to Server-r/--range <range> retrieve byte range from http/1.1 or FTP server--range-file Read (SSL) random file-r/--remote-time   When a file is generated locally, keep remote file Time--retry <num>   The number of retries when there is a problem with the transmission-- Retry-delay <seconds>  When there is a problem with the transmission, set the retry interval time--retry-max-time <seconds> The maximum retry time-s/--silent mute mode when there is a problem with the Transmission. Do not output anything-s/--show-error   display ERROR--SOCKS4 
two, commonly used Curl instance
1, crawl the page content into a file
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[email protected] mytest]# Curl-o home.html http://blog.51yip.com
 
  
 
 
2, with-o (uppercase), The following URL to specific to a file, or not catch it down. We can also use the regular to grab things.
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[[email protected] mytest]# Curl-o http://blog.51yip.com/wp-content/uploads/2010/09/compare_varnish.jpg
 
   
[[email protected] mytest]# Curl-o http://blog.51yip.com/wp-content/uploads/2010/[0-9][0-9]/aaaaa.jpg
 
  
 
 
3, simulate form information, simulate login, save cookie information
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[email protected] mytest]# curl-c/cookie_c.txt-f log=aaaa-f pwd=****** http://blog.51yip.com/wp-login.php
 
  
 
 
4, simulating form information, simulating login, saving header information
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[email protected] mytest]# curl-d/cookie_d.txt-f log=aaaa-f pwd=****** http://blog.51yip.com/wp-login.php
 
  
 
 
The cookie generated by-c (lowercase) is not the same as the cookie In-d.
5, Use cookie File
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[email protected] mytest]# curl-b./cookie_c.txt http://blog.51yip.com/wp-admin
 
  
 
 
6, The breakpoint continues to pass,-c (uppercase)
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[[email protected] mytest]# curl-c-o http://blog.51yip.com/wp-content/uploads/2010/09/compare_varnish.jpg
 
  
 
 
7, Transfer the data, it is best to use the login page test, because you pass the value of the past, curl back to grasp the data, you can see that you pass the value has no success
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[email protected] mytest]# curl-d log=aaaa http://blog.51yip.com/wp-login.php
 
  
 
 
8, Show the fetch error, the following example, it is very clear that.
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[[email protected] mytest]# curl-f http://blog.51yip.com/asdf
 
   
Curl: () The requested URL returned error:404
 
   
[[email protected] mytest]# Curl http://blog.51yip.com/asdf
 
   
 
   
 
   
。。。。。。。。。。。。
 
  
 
 
9, Forged Source address, Some website will judge, request source Address.
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[[email protected] mytest]# curl-e http://localhost http://blog.51yip.com/wp-login.php
 
  
 
 
10, when we often use curl to engage in People's things, people will put your IP to shield off, this time, we can use the agent
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[email protected] mytest]# curl-x 24.10.28.84:32779-o home.html http://blog.51yip.com
 
  
 
 
11, than the larger stuff that we can download in sections
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[email protected] mytest]# curl-r 0-100-o img.part1 http://blog.51yip.com/wp-
  
  

  

  
  

  
Content/uploads/2010/09/compare_varnish.jpg
  
  

  
% total% Received% xferd Average speed Time Time current
  
  

  
Dload Upload Total spent
  
  

  
101 101 0 0 0--:--:----:---:----:--:--0
  
  

  
[email protected] mytest]# curl-r 100-200-o img.part2 http://blog.51yip.com/wp-
  
  

  

  
  

  
Content/uploads/2010/09/compare_varnish.jpg
  
  

  
% total% Received% xferd Average speed Time Time current
  
  

  
Dload Upload Total spent
  
  

  
100 101 100 101 0 0 57 0 0:00:01 0:00:01--:--:--0
  
  

  
[[email protected] mytest]# curl-r 200--o img.part3 http://blog.51yip.com/wp-
  
  

  

  
  

  
Content/uploads/2010/09/compare_varnish.jpg
  
  

  
% total% Received% xferd Average speed Time Time current
  
  

  
Dload Upload Total spent
  
  

  
104k 104k 0 0 52793 0 0:00:02 0:00:02--:--:--88961
  
  

  
[[email protected] mytest]# ls |grep part | Xargs Du-sh
  
  

  
4.0K One.part1
  
  

  
112K Three.part3
  
  

  
4.0K Two.part2
 
 
When you use them, catimg.part* >img.jpg
12, download Progress information is not displayed
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[[email protected] mytest]# curl-s-o aaa.jpg http://blog.51yip.com/wp-content/uploads/2010/09/compare_ Varnish.jpg
 
  
 
 
13, Show Download progress bar
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[[email protected] mytest]# curl-#-o http://blog.51yip.com/wp-content/uploads/2010/09/compare_varnish.jpg
 
   
######################################################################## 100%
 
  
 
 
14. Download files via FTP
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[[email protected] ~]$ curl-u username: password-o http://blog.51yip.com/demo/curtain/bbstudy_files/style.css
 
   
% total% Received% xferd Average speed Time Time current
 
   
Dload Upload Total spent
 
   
101 1934 101 1934 0 0 3184 0--:--:----:--:----:--:--7136
 
  
 
 
Or in the following way
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[[email protected] ~]$ Curl-o ftp://user name: password @ip:port/demo/curtain/bbstudy_files/style.css
 
  
 
 
15, Upload via FTP
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[[email protected] ~]$ curl-t test.sql ftp://user name: password @ip:port/demo/curtain/bbstudy_files/
 
  
 
 
A detailed description of the Linux Curl command, as well as examples