What are the linux curl command parameters and how to use them

linux curl is a file transfer tool that uses url rules to work under the command line. It supports file upload and download, so it is a comprehensive transmission tool, but according to tradition, it is customary to call URL a download tool.

1. Curl command parameters

-a/--append When uploading files, append to the target file

-a/--user-agent <string> Settings User agent sent to the server

　-anyauth Can use "any" authentication method

　-b/--cookie <name=string/file> cookie string or file reading location

　-basic Use http basic authentication

　-b/--use-ascii Use ascii/text transmission

　-c/--cookie-jar <file> Operation completed Then write the cookie to this file

　-c/--continue-at <offset> Continue at breakpoint

　-d/--data <data> http post mode Transmit data

　--data-ascii <data> Post data in ascii format

　--data-binary <data> Post data in binary format

--negotiate Use http authentication

--digest Use digital authentication

--disable-eprt Disable the 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 for random data (ssl) socket path

　--tcp-nodelay Use tcp_nodelay option

　-e/--referer source URL

　-e/--cert <cert[:passwd]> ; 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 Requires the returned state to be compressed (using deflate or gzip)

　 --connect-timeout <seconds> Sets the maximum request time

　 --create-dirs Create a directory for the local directory Hierarchy

　--crlf Uploading is to convert lf into crlf

　-f/--fail Do not display http errors when the connection fails

　--ftp-create-dirs If the remote directory does not exist, create the remote directory

　--ftp-method [multicwd/nocwd/singlecwd] Control the use of cwd

　--ftp-pasv Use pasv/epsv instead of port

　--ftp-skip-pasv-ip When using pasv, ignore the ip address

　--ftp-ssl Try to use ssl/tls for ftp data transmission

　- -ftp-ssl-reqd Requires ssl/tls for ftp data transmission

　-f/--form <name=content> Simulates http form submission data

　-form-string &lt ;name=string> Simulate http form submission data

　-g/--globoff Disable URL sequence and range using {} and []

　-g/--get Use get method Send data

　-h/--help Help

　-h/--header <line>Custom header information is passed to the server

　--ignore-content- length The length of the ignored http header information

　-i/--include Include protocol header information when output

　-i/--head Only display document information

From the file Read -j/--junk-session-cookiesIgnore session cookies

　-Interface<interface>Specify network interface/address to use

　-krb4 <Level>Enable and specify Security level krb4

　-j/--junk-session-cookies Read the file and ignore the session cookie

　--interface <interface> Use the specified network interface/address

　--krb4 <level> Use krb4 with the specified security level

　-k/--insecure Allow ssl sites without certificates

　-k/--config Specify the configuration file Read

　-l/--list-only List the file names in the ftp directory

　--limit-rate <rate> Set the transfer speed

　-- local-port<num> Force the use of local port number

　-m/--max-time <seconds> Set the maximum transmission time

　--max-redirs <num> Set the maximum Number of directories read

　--max-filesize <bytes> Set the maximum total number of downloaded files

　-m/--manual Display all manual

　-n/--netrc Read username and password from netrc file

　--netrc-optional Use .netrc or url to override -n

　--ntlm Use http ntlm Authentication

　-n/--no-buffer Disable buffered output

　-o/--output Write output to this file

　-o/--remote -name Write output to this file, retaining the file name of the remote file

　-p/--proxytunnel Use http proxy

　--proxy-anyauth Select any proxy authentication method

　--proxy-basic Use basic authentication on the proxy

　--proxy-digest Use digital authentication on the proxy

　--proxy-ntlm Use on the proxy ntlm authentication

　-p/--ftp-port <address> Use port address instead of using pasv

　-q/--quote <cmd>Send before file transfer Command to server

　-r/--range <range>Retrieve byte range from http/1.1 or ftp server

　--range-file Read (ssl) a random file

　 -r/--remote-time When generating files locally, keep the remote file time

　 --retry <num> When there is a problem with the transmission, the number of retries

　--retry-delay <seconds> When there is a problem with the transmission, set the retry interval

　--retry-max-time <seconds> When there is a problem with the transmission, set the maximum retry time

　-s/--silent silent mode. Do not output anything

　-s/--show-error Show errors

　--socks4 <host[:port]> Use socks4 to proxy the given host and port

　--socks5 <host[:port]> Use socks5 to proxy the given host and port

　--stderr <file>
-t/--telnet-option <opt= val> telnet option setting

　--trace <file> Debug the specified file

　--trace-ascii <file> like --trace but no hex output

　--trace-time When tracing/detailed output, add a timestamp

　-t/--upload-file <file> Upload file

　--url <url> spet url to work with

　-u/--user <user[:password]>Set the server user and password

　-u/--proxy-user <user[: password]>Set proxy username and password

　-v/--verbose

　-v/--version Display version information

　-w/--write-out [format]What output is completed

　-x/--proxy <host[:port]>Use http proxy on the given port

　-x/--request &lt ;command>What command to specify

　-y/--speed-time The time required to give up the speed limit. The default is 30

　-y/--speed-limit Stop transmission speed limit, speed time 'seconds

　-z/--time-cond Transmission time setting

-0/--http1.0 Use http 1.0

　-1/--tlsv1 Use tlsv1 (ssl)

　-2/--sslv2 Use sslv2 (ssl)

　 -3/--sslv3  Used sslv3 (ssl)

  --3p-quote  like -q for the source url for 3rd party transfer

  --3p-url  Use url, Perform third-party transmission

　--3p-user Use user name and password to perform third-party transmission

　-4/--ipv4 Use ip4

　-6/--ipv6 Use ip6

　-#/--progress-bar Display the current transfer status with a progress bar

　-a/--append When uploading a file, append it to the target file

-a/--user-agent <string> Set the user agent sent to the server

　- anyauth Can use "any" authentication method

　-b/--cookie <name= string/file> cookie string or file reading position

　- basic Use http basic authentication

　-b/--use-ascii Use ascii/text transmission

　- c/--cookie-jar <file> Write the cookie to this file after the operation is completed

　-c/--continue-at <offset> Continue at the breakpoint

-d/--data <data> HTTP post method to transmit data

　 --data-ascii <data> Post data in ascii method

　 --data-binary <data&gt ; Post data in binary format

　--negotiate Use http authentication

　--digest Use digital authentication

　--disable-eprt Disable the 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[:passwd]> 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 Request to return Is the compression situation (using deflate or gzip)

　--connect-timeout <seconds> Set the maximum request time

　--create-dirs Establish the directory hierarchy of the local directory

　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　 will will need should be will be required. | , create a remote directory

　--ftp-method [multicwd/nocwd/singlecwd] Control the use of cwd

　--ftp-pasv Use pasv/epsv instead of port

　- -ftp-skip-pasv-ip When using pasv, ignore the ip address

　--ftp-ssl Try to use ssl/tls for ftp data transmission

　--ftp-ssl- reqd requires the use of ssl/tls for ftp data transmission

　-f/--form <name=content> Simulate http form submission data

　-form-string <name=string> Simulate http form submission data

　-g/--globoff Disable URL sequences and ranges using {} and []

　-g/--get Send data in the get method

　-h/--help Help

　-h/--header <line>Custom header information is passed to the server

　--ignore-content-length Ignored http header The length of the information

　-i/--include Include protocol header information when output

　-i/--head Only display document information

Read from the file-j /--junk-session-cookiesIgnore session cookies

　-Interface<interface>Specify network interface/address to use

　-krb4 <Level>Enable with specified security level krb4

　-j/--junk-session-cookies Read the file and ignore the session cookie

　--interface <interface> Use the specified network interface/address

　--krb4 <level> Use krb4 with the specified security level

　-k/--insecure Allow SSL sites without certificates

　-k/--config Read the specified configuration file

　-l/--list-only List the file names in the ftp directory

　--limit-rate <rate> Set the transmission speed

　--local-port<num&gt ; Force the use of local port number

　-m/--max-time <seconds> Set the maximum transfer time

　--max-redirs <num> Set the maximum number of directories to be read

　--max-filesize <bytes> Set the maximum total number of downloaded files

-m/--manual Display all manual

　-n/--netrc From the netrc file Read username and password

　--netrc-optional Use .netrc or url to override -n

　--ntlm Use http ntlm authentication

　-n/-- no-buffer Disable buffered output

　-o/--output Write the output to this file

　-o/--remote-name Write the output to this file and keep the remote file Filename

　-p/--proxytunnel Use http proxy

　--proxy-anyauth Choose any proxy authentication method

　--proxy-basic On the proxy Use basic authentication

　--proxy-digest Use digital authentication on the proxy

　--proxy-ntlm Use ntlm authentication on the proxy

　-p/- -ftp-port <address> Use port address instead of using pasv

　-q/--quote <cmd>Send command to server before file transfer

　-r/- -range <range>Retrieve byte range from http/1.1 or ftp server

　 --range-file Read (ssl) a random file

　-r/--remote-time When generating files locally, keep the remote file time

　--retry <num> When there is a problem with the transmission, the number of retries

　--retry-delay <seconds> When there is a problem with the transmission When there is a transmission problem, set the retry interval

　--retry-max-time <seconds> When there is a problem with the transmission, set the maximum retry time

　-s/--silent silent mode. Do not output anything

　-s/--show-error Show errors

　--socks4 <host[:port]> Use socks4 to proxy the given host and port

　--socks5 <host[:port]> Use socks5 to proxy the given host and port

　--stderr <file>

　-t/--telnet-option &lt ;opt=val> telnet option setting

　 --trace <file> Debug the specified file

　 --trace-ascii <file> like --trace but no hex output

　--trace-time When tracing/detailed output, add a timestamp

　-t/--upload-file <file> Upload file

　--url < url> spet url to work with

　-u/--user <user[:password]>Set the server user and password

　-u/--proxy-user < user[:password]>Set proxy username and password

　-v/--verbose

　-v/--version Display version information

　-w/-- write-out [format]What output is completed

　-x/--proxy <host[:port]>Use http proxy on the given port

　-x/- -request <command>Specify what command

　-y/--speed-time The time required to give up the speed limit. The default is 30

　-y/--speed-limit Stop transmission speed limit, speed time 'seconds

　-z/--time-cond Transmission time setting

-0/--http1.0 Use http 1.0

　-1/--tlsv1 Use tlsv1 (ssl)

　-2/--sslv2 Use sslv2 (ssl)

　 -3/--sslv3  Used sslv3 (ssl)

  --3p-quote  like -q for the source url for 3rd party transfer

  --3p-url  Use url, Perform third-party transmission

　--3p-user Use user name and password to perform third-party transmission

　-4/--ipv4 Use ip4

　-6/--ipv6 Use ip6

　-#/--progress-bar Use the progress bar to display the current transmission status

　2. Commonly used curl examples

　1. Grab the page content into a file中

　[root@krlcgcms01 mytest]# curl -o home.html

　[root@krlcgcms01 mytest]# curl -o home.html

　2, use -o (in capital letters), the following url must be specific to a certain file, otherwise it will not be captured. We can also use regular expressions to grab things

　[root@krlcgcms01 mytest]# curl -o

　[root@krlcgcms01 mytest]# curl -o

　3. Simulation Form information, simulate login, save cookie information

　[root@krlcgcms01 mytest]# curl -c ./cookie_c.txt -f log=aaaa -f pwd=******

[root@krlcgcms01 mytest]# curl -c ./cookie_c.txt -f log=aaaa -f pwd=******

4. Simulate form information, simulate login, save header information

　[root@krlcgcms01 mytest]# curl -d ./cookie_d.txt -f log=aaaa -f pwd=******

　[root@krlcgcms01 mytest]# curl - d ./cookie_d.txt -f log=aaaa -f pwd=******

　The cookie generated by -c (lowercase) is different from the cookie in -d.

5. Use cookie files

[root@krlcgcms01 mytest]# curl -b ./cookie_c.txt

[root@krlcgcms01 mytest]# curl -b ./ cookie_c.txt

6. Resume the transfer, -c (capital)

[root@krlcgcms01 mytest]# curl -c -o

7. Transfer data , it is best to use the login page to test, because after you pass the value, curl will capture the data, and you can see whether the value you passed is successful

　[root@krlcgcms01 mytest]# curl -d log=aaaa

　[root@krlcgcms01 mytest]# curl -d log=aaaa

　8, display the crawl error, the following example clearly shows it.

　[root@krlcgcms01 mytest]# curl -f

　curl: (22) the requested url returned error: 404

　[root@krlcgcms01 mytest]# curl

　<html><head><title>404,not found</title>

　. . . . . . . . . . . .

　[root@krlcgcms01 mytest]# curl -f

　curl: (22) the requested url returned error: 404

　[root@krlcgcms01 mytest]# curl

　<html><head><title>404,not found</title>

　. . . . . . . . . . . .

　9. Forge the source address. Some websites will judge and request the source address.

　[root@krlcgcms01 mytest]# curl -e

　[root@krlcgcms01 mytest]# curl -e

　10. When we often use curl to mess with other people’s things, People will block your IP. At this time, we can use proxy

　[root@krlcgcms01 mytest]# curl -x 24.10.28.84:32779 -o home.html

[root@krlcgcms01 mytest]# curl -x 24.10.28.84:32779 -o home.html
11, for larger things, we can download them in sections

　　[root@krlcgcms01 mytest]# curl -r 0-100 -o img.part1 -

　　content/uploads/2010/09/compare_varnish.jpg

　　% total    % received % xferd  average speed   time    time     time  current

　　dload  upload   total   spent    left  speed

　　100   101  100   101    0     0    105      0 --:--:-- --:--:-- --:--:--     0

　　[root@krlcgcms01 mytest]# curl -r 100-200 -o img.part2 -

　　content/uploads/2010/09/compare_varnish.jpg

　　% total    % received % xferd  average speed   time    time     time  current

　　dload  upload   total   spent    left  speed

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

　　[root@krlcgcms01 mytest]# curl -r 200- -o img.part3 -

　　content/uploads/2010/09/compare_varnish.jpg

　　% total    % received % xferd  average speed   time    time     time  current

　　dload  upload   total   spent    left  speed

　　100  104k  100  104k    0     0  52793      0  0:00:02  0:00:02 --:--:-- 88961

　　[root@krlcgcms01 mytest]# ls |grep part | xargs du -sh

　　4.0k    one.part1

　　112k    three.part3

　　4.0k    two.part2

　　[root@krlcgcms01 mytest]# curl -r 0-100 -o img.part1 -

　　content/uploads/2010/09/compare_varnish.jpg

　　% total    % received % xferd  average speed   time    time     time  current

　　dload  upload   total   spent    left  speed

　　100   101  100   101    0     0    105      0 --:--:-- --:--:-- --:--:--     0

　　[root@krlcgcms01 mytest]# curl -r 100-200 -o img.part2 -

　　content/uploads/2010/09/compare_varnish.jpg

　　% total    % received % xferd  average speed   time    time     time  current

　　dload  upload   total   spent    left  speed

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

　　[root@krlcgcms01 mytest]# curl -r 200- -o img.part3 -

　　content/uploads/2010/09/compare_varnish.jpg

　　% total    % received % xferd  average speed   time    time     time  current

　　dload  upload   total   spent    left  speed

　　100  104k  100  104k    0     0  52793      0  0:00:02  0:00:02 --:--:-- 88961

　　[root@krlcgcms01 mytest]# ls |grep part | xargs du -sh

　　4.0k    one.part1

　　112k    three.part3

　　4.0k    two.part2

　　用的时候，把他们cat一下就ok了,cat img.part* >img.jpg

　　12，不会显示下载进度信息

　　[root@krlcgcms01 mytest]# curl -s -o aaa.jpg

　　13，显示下载进度条

　　[root@krlcgcms01 mytest]# curl -# -o

　　

################################# 100.0%######　　14,通过ftp下载文件######　　[zhangy@blackghost ~]$ curl -u 用户名:密码 -o######　　% total    % received % xferd  average speed   time    time     time  current######　　dload  upload   total   spent    left  speed######　　101  1934  101  1934    0     0   3184      0 --:--:-- --:--:-- --:--:--  7136######　　[zhangy@blackghost ~]$ curl -u 用户名:密码 -o###

% total % received % xferd average speed time time current

dload upload total spent left speed

101 1934 101 1934 0 0 3184 0 --:--:-- -:--:-- --:--:-- 7136

Or use the following method

　[zhangy@blackghost ~]$ curl -o ftp://username: Password@ip:port/demo/curtain/bbstudy_files/style.css

　[zhangy@blackghost ~]$ curl -o ftp://username:password@ip:port/demo/curtain/bbstudy_files/ style.css

　15, upload via ftp

　[zhangy@blackghost ~]$ curl -t test.sql ftp://username:password@ip:port/demo/curtain/ bbstudy_files/

　[zhangy@blackghost ~]$ curl -t test.sql ftp://username:password@ip:port/demo/curtain/bbstudy_files/

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