Linux curl Command: Syntax, Options, Protocols (2024)

--abstract-unix-socket <path>Connect through an abstract Unix socket instead of through a network.

Example:
curl --abstract-unix-socket /var/run/docker.sock http://localhost/images/json

--alt-svc <parameters>Enable alt-svc parser.

Example:
curl --alt-svc 'quic=":443"; ma=2592000; v="46,47,48"' https://example.com

--anyauthcurl finds and uses the most secure authentication method for the given HTTP URL.

Example:
curl --anyauth --user user:password https://example.com

-a, --appendAppend to the target file.

Example:
curl --upload-file local --append ftp://example.com/

--aws-sigv4 <provider1[:provider2[:region[:service]]]>Use AWS V4 signature authentication.

Example:
curl --aws-sigv4 "aws:amz:east-2:es" --user "key:secret" https://example.com

--basicUse HTTP basic authentication.

Example:
curl -u name:password --basic https://example.com

--cacert <file>Use the specified file for certificate verification.

Example:
curl --cacert CA-file.txt https://example.com

--capath <dir>Use the specified directory to look for the certificates.

Example:
curl --capath /local/directory https://example.com

--cert-statusSend data to an HTTP server in a POST request.

Example:
curl -d "name=curl" https://example.com

--cert-type <type>Specify the type of the provided certificate. The recognized types are PEM (default), DER, ENG, and P12.

Example:
curl --cert-type ENG --cert file https://example.com

-E, --cert <certificate[:password]>Send data to an HTTP server in a POST request.

Example:
curl -d "name=curl" https://example.com

--ciphers <list of ciphers>Provide ciphers for the connection.

Example:
curl --ciphers ECDHE-ECDSA-AES256-CCM8 https://example.com

--compressed-sshEnable built-in SSH compression.

Example:
curl --compressed-ssh sftp://example.com/

--compressedRequest to receive a compressed response.

Example:
curl --compressed https://example.com

-K, --config <file>Provide a text file with curl arguments instead of writing them on the command line.

Example:
curl --config file.txt https://example.com

--connect-timeout <fractional seconds>Specify the maximum time a curl connection may last.

Example:
curl --connect-timeout 30 https://example.com

--connect-to <HOST1:PORT1:HOST2:PORT2>Provide a connection rule to direct requests at a specific server cluster node.

Example:
curl --connect-to example.com:443:example.net:8443 https://example.com

-C, --continue-at <offset>Resume file transfer at the offset specified.

curl -C 400 https://example.com

-c, --cookie-jar <filename>Specify a file for storing cookies.

curl -c store.txt https://example.com

-b, --cookie <data|filename>Read cookies from a file.

Example:
curl -b cookiefile https://example.com

--create-dirsCreate the local directories for the --output option.

Example:
curl --create-dirs --output local/dir/file https://example.com

--create-file-mode <mode>Specify which mode to set upon file creation.

Example:
curl --create-file-mode 0777 -T localfile sftp://example.com/new

--crlfConvert LF to CRLF.

curl --crlf -T file ftp://example.com/

--crlfile <file>Provide a Certificate Revocation List for peer certificates.

curl --crlfile revoke.txt https://example.com

--curves <algorithm list>Provide curves for establishing an SSL session.

Example:
curl --curves X25519 https://example.com

--data-ascii <data>See -d, --data.

Example:
curl --data-ascii @file https://example.com

--data-binary <data>Post data as specified without extra processing.

curl --data-binary @filename https://example.com

--data-raw <data>Same as -d, --data, but the (@) character is not treated differently from the rest.

curl --data-raw "@at@at@" https://example.com

--data-urlencode <data>Same as -d, --data, but perform URL encoding.

Example:
curl --data-urlencode name=val https://example.com

-d, --data <data>Send data to a HTTP server in a POST request.

Example:
curl -d "name=curl" https://example.com

--delegation <LEVEL>Specify when the server is allowed to delegate credentials.

Example:
curl --delegation "always" https://example.com

--digestEnable HTTP Digest authentication.

Example:
curl -u name:password --digest https://example.com

--disable-eprtDisable EPRT and LPRT commands for active FTP transfers.

Example:
curl --disable-eprt ftp://example.com/

--disable-epsvDisable EPSV for passive FTP transfers.

Example:
curl --disable-epsv ftp://example.com/

-q, --disableDisable the reading of the curlrc config file.

curl -q https://example.com

--disallow-username-in-urlDisallow sending a URL that contains a username. Instead, send the credentials in the request header.

Example:
curl --disallow-username-in-url https://user:password@example.com

--dns-interface <interface>Specify an interface for outgoing DNS requests.

Example:
curl --dns-interface eth0 https://example.com

--dns-ipv4-addr <address>Specify the IPv4 address from which the DNS requests will come.

Example:
curl --dns-ipv4-addr 10.1.2.3 https://example.com

--dns-ipv6-addr <address>Specify an IPv6 address from which the DNS requests will come.

Example:
curl --dns-ipv6-addr 2a04:4e42::561 https://example.com

--dns-servers <addresses>Specify your list of DNS servers.

Example:
curl --dns-servers 192.168.0.1,192.168.0.2 https://example.com

--doh-cert-status--cert-status for DNS-over-HTTPS.

Example:
curl --doh-cert-status --doh-url https://doh.server https://example.com

--doh-insecure-k, --insecure for DoH.

Example:
curl --doh-insecure --doh-url https://doh.server https://example.com

--doh-url <URL>Specify a DoH server for hostname resolution.

Example:
curl --doh-url https://doh.server https://example.com

-D, --dump-header <filename>Specify a file for writing protocol headers.

Example:
curl --dump-header store.txt https://example.com

--egd-file <file>Provide a path for the EGD socket.

Example:
curl --egd-file /path/here https://example.com

--engine <name>Specify an OpenSSL crypto engine.

Example:
curl --engine flavor https://example.com

--etag-compare <file>Request an ETag read from a file.

Example:
curl --etag-compare etag.txt https://example.com

--etag-save <file>Save an HTTP ETag to a file.

Example:
curl --etag-save etag.txt https://example.com

--expect100-timeout <seconds>Maximum wait time for a 100-continue response.

Example:
curl --expect100-timeout 2.5 -T file https://example.com

-f, --failIf the server returns an error, curl fails silently and returns error 22.

Example:
curl --fail https://example.com

-F, --form <name=content>Emulate a form with a Submit button that has been pressed. The @ sign forces the content to be a file. The < sign extracts only the content part of the file.

Example:
curl --form "name=curl" --form "file=@loadthis" https://example.com

--fail-earlyTell curl to fail and exit when it detects the first error in transfer.

Example:
curl --fail-early https://example.com

--fail-with-bodyIf the server returns an error with code 400 or greater, curl saves the content and returns error 22.

Example:
curl --fail-with-body https://example.com

--false-startUse false start on TLS handshake.

Example:
curl --false-start https://example.com

--form-string <name=string>Similar to -F, --form, but the value strings are processed literally.

Example:
curl --form-string "data" https://example.com

--ftp-account <data>Specify the account data for the FTP server.

Example:
curl --ftp-account "account_data" ftp://example.com/

--ftp-alternative-to-user <command>Specify the command to be sent if the username and password authentication fails.

Example:
curl --ftp-alternative-to-user "U53r" ftp://example.com

--ftp-create-dirsIf the specified directorydoes not exist, curl will attempt to create it.

Example:
curl --ftp-create-dirs -T file ftp://example.com/dirs/one/file

--ftp-method <method>Specify a method to be used to obtain files over FTP. Available methods are multicwd, nocwd, and singlecwd.

Example:
curl --ftp-method multicwd ftp://example.com/dir1/dir2/file

--ftp-pasvUse passive data connection mode.

Example:
curl --ftp-pasv ftp://example.com/

-P, --ftp-port <address>Reverse the default roles for the FTP connection.

Example:
curl -P eth0 ftp:/example.com

--ftp-pretSend the PRETcommand before PASV/EPSV.

Example:
curl --ftp-pret ftp://example.com/

--ftp-skip-pasv-ipDo not use the IP address suggested by the server. curl will use the control connection IP.

Example:
curl --ftp-skip-pasv-ip ftp://example.com/

--ftp-ssl-ccc-mode <active/passive>Set the Clear Command Channel (CCC) mode.

Example:
curl --ftp-ssl-ccc-mode active --ftp-ssl-ccc ftps://example.com/

--ftp-ssl-cccThe SSL/TLS layer is eliminated after the authentication, allowing unencrypted communication.

Example:
curl --ftp-ssl-ccc ftps://example.com/

--ftp-ssl-controlUse SSL/TLS for logging in and stop the encryption when the data transfer starts.

Example:
curl --ftp-ssl-control ftp://example.com

-G, --getUse HTTP GET request instead of POST.

Example:
curl --get -d "tool=curl" -d "age=old" https://example.com

-g, --globoffDisable the URL globbing parser.

Example:
curl -g "https://example.com/{[]}}}}"

--happy-eyeballs-timeout-ms <milliseconds>Use the Happy Eyeballs algorithm to connect to dual-stack hosts.

Example:
curl --happy-eyeballs-timeout-ms 500 https://example.com

--haproxy-protocolUse HAProxy PROXY protocol v1 header.

Example:
curl --haproxy-protocol https://example.com

-I, --headObtain only headers.

Example:
curl -I https://example.com

-H, --header <header/@file>Specify an additional header to be sent in the HTTP request.

Example:
curl -H "X-First-Name: Joe" https://example.com

-h, --help <category>See help for a specific category. all lists all the available options.

Example:
curl --help all

--hostpubmd5 <md5>Pass a 32-digit hexadecimal string.

Example:
curl --hostpubmd5 e5c1c49020640a5ab0f2034854c321a8 sftp://example.com/

--hsts <file name>Enable HSTS.

Example:
curl --hsts cache.txt https://example.com

--http0.9Accept an HTTP version 0.9 response.

Example:
curl --http0.9 https://example.com

-0, --http1.0Use HTTP version 1.0.

Example:
curl --http1.0 https://example.com

--http1.1Use HTTP version 1.1.

Example:
curl --http1.1 https://example.com

--http2-prior-knowledgeUse HTTP version 2.0. Use this option if you know that the server supports this HTTP version.

Example:
curl --http2-prior-knowledge https://example.com

--http2Attempt to use HTTP version 2.0.

Example:
curl --http2 https://example.com

--http3Use HTTP version 3.0. This is an experimental option.

Example:
curl --http3 https://example.com

--ignore-content-lengthIgnore the Content-Length header.

Example:
curl --ignore-content-length https://example.com

-i, --includeSpecify that the output should include the HTTP response headers.

Example:
curl -i https://example.com

-k, --insecureAllow curl to work with insecure connections.

Example:
curl --insecure https://example.com

--interface <name>Specify the interface for performing an action.

Example:
curl --interface eth0 https://example.com

-4, --ipv4Only resolve names to IPv4 addresses.

Example:
curl --ipv4 https://example.com

-6, --ipv6Only resolve names to IPv6 addresses.

Example:
curl --ipv6 https://example.com

-j, --junk-session-cookiesDiscard session cookies.

Example:
curl --junk-session-cookies -b cookies.txt https://example.com

--keepalive-time <seconds>Specify the idle time for the connection before it sends keepalive probes.

Example:
curl --keepalive-time 30 https://example.com

--key-type <type>Specify the type of the private key. Available types are PEM (default), DER, and ENG.

Example:
curl --key-type ENG --key here https://example.com

--key <key>Specify the file containing the private key.

Example:
curl --cert certificate --key here https://example.com

--krb <level>Enable and use Kerberos authentication. Available levels are clear, safe, confidential, and private (default).

Example:
curl --krb clear ftp://example.com/

--libcurl <file>Obtain C source code for the specified command line operation.

Example:
curl --libcurl client.c https://example.com

--limit-rate <speed>Specify the maximum upload and download transfer rate.

Example:
curl --limit-rate 100K https://example.com

-l, --list-onlyForce a name-only view.

Example:
curl --list-only ftp://example.com/dir/

--local-port <num/range>Specify the port numbers to be used for the connection.

Example:
curl --local-port 1000-3000 https://example.com

--location-trustedSimilar to -L, --location, but enables you to send a name and password to all redirections.

Example:
curl --location-trusted -u user:pass https://example.com

-L, --locationAllow curl to follow any redirections.

Example:
curl -L https://example.com

--login-options <options>Specify the login options for email server authentication.

Example:
curl --login-options 'AUTH=*' imap://example.com

--mail-auth <address>Provide a single address as the identity.

Example:
curl --mail-auth user@example.come -T mail smtp://example.com/

--mail-from <address>Provide a single from address.

Example:
curl --mail-from user@example.com -T mail smtp://example.com/

--mail-rcpt-allowfailsAllows curl to continue with the SMTP conversation if one of the recipients fails.

Example:
curl --mail-rcpt-allowfails --mail-rcpt dest@example.com smtp://example.com

--mail-rcpt <address>Provide a single to address.

Example:
curl --mail-rcpt user@example.net smtp://example.com

-M, --manualRead the curl manual.

Example:
curl --manual

--max-filesize <bytes>Provide the maximum size of the file to be downloaded.
Example:
curl --max-filesize 500K https://example.com--max-redirs <num>Specify the maximum number of redirections when --location is active.

Example:
curl --max-redirs 3 --location https://example.com

-m, --max-time <fractional seconds>Specify the maximum time for an operation.

Example:
curl --max-time 5.52 https://example.com

--metalinkSpecify a metalink resource. This option is disabled in the newest versions of curl.

Example:
curl --metalink file https://example.com

-n, --netrcSearch the netrc file for login information.

Example:
curl --netrc https://example.com

-N, --no-bufferDisable output stream buffer.

Example:
curl --no-buffer https://example.com

--negotiateEnable SPNEGO authentication.

Example:
curl --negotiate -u : https://example.com

--netrc-file <filename>Like --n, --netrc, but allows you to specify the file to be used.

Example:
curl --netrc-file netrc https://example.com

--netrc-optionalLike --n, --netrc, but using netrc is optional.

Example:
curl --netrc-optional https://example.com

-:, --nextUse the option to separate URL requests.

Example:
curl -I https://example.com --next https://example.net/

--no-alpnDisable ALPN TLS extension.

Example:
curl --no-alpn https://example.com

--no-keepaliveDisable keepalive messages.

Example:
curl --no-keepalive https://example.com

--no-npnDisable NPN TLS extension.

Example:
curl --no-npn https://example.com

--no-progress-meterDisable the progress bar but display any other message.

Example:
curl --no-progress-meter -o store https://example.com

--no-sessionidDisable the caching of SSL session-ID.

Example:
curl --no-sessionid https://example.com

--noproxy <no-proxy-list>List the hosts that should not use a proxy.

Example:
curl --noproxy "www.example" https://example.com

--ntlmEnable NTLM authentication.

Example:
curl --ntlm -u user:password https://example.com

--ntlm-wbLike --ntlm, but also hands authentication to ntlmauth.

Example:
curl --ntlm-wb -u user:password https://example.com

-o, --output <file>Store output in a file. The output is not shown in stdout.

Example:
curl -o file https://example.com -o file2 https://example.net

--oauth2-bearer <token>Provide a Bearer Token for OAUTH 2.0.

Example:
curl --oauth2-bearer "mF_9.B5f-4.1JqM" https://example.com

--output-dir <dir>Specify the output file directory.

Example:
curl --output-dir "tmp" -O https://example.com

--parallel-immediatePrefer parallel connections to waiting for new connections or multiplexed streams.

Example:
curl --parallel-immediate -Z https://example.com -o file1 https://example.com -o file2

--parallel-max <num>Specify the maximum number of parallel connections.

Example:
curl --parallel-max 100 -Z https://example.com ftp://example.com/

-Z, --parallelPerform transfers in parallel.

Example:
curl --parallel https://example.com -o file1 https://example.com -o file2

--pass <phrase>Specify a private key passphrase.

Example:
curl --pass secret --key file https://example.com

--path-as-isPrevent curl from merging /./ and /../ sequences.

Example:
curl --path-as-is https://example.com/../../etc/passwd

--pinnedpubkey <hashes>Specify a public key for curl to use.

Example:
curl --pinnedpubkey keyfile https://example.com

--post301Prevent curl from converting POST to GET requests after a 301 redirection.

Example:
curl --post301 --location -d "data" https://example.com

--post302Prevent curl from converting POST to GET requests after a 302 redirection.

curl --post302 --location -d "data" https://example.com

--post303Prevent curl from converting POST to GET requests after a 303 redirection.

Example:
curl --post303 --location -d "data" https://example.com

--preproxy [protocol://]host[:port]Use the SOCKS proxy as a pre-proxy.

Example:
curl --preproxy socks5://proxy.example -x http://http.example https://example.com

-#, --progress-barUse the simple progress bar.

Example:
curl -# -O https://example.com

--proto-default <protocol>Specify which protocol curl should use for URLs without a scheme name.

Example:
curl --proto-default https ftp.example.com

--proto-redir <protocols>Specify which protocols curl should use on redirection.

Example:
curl --proto-redir =http,https https://example.com

--proto <protocols>Specify which protocols curl should use for transfers.

Example:
curl --proto =http,https,sftp https://example.com

--proxy-anyauthcurl should choose an appropriate authentication method.

Example:
curl --proxy-anyauth --proxy-user user:passwd -x proxy https://example.com

--proxy-basicUse HTTP Basic to communicate with a proxy.

Example:
curl --proxy-basic --proxy-user user:passwd -x proxy https://example.com

--proxy-cacert <file>--cacert for HTTPS proxies.

Example:
curl --proxy-cacert CA-file.txt -x https://proxy https://example.com

--proxy-capath <dir>--capath for HTTPS proxies.

Example:
curl --proxy-capath /local/directory -x https://proxy https://example.com

--proxy-cert-type <type>--cert-type for HTTPS proxies.

Example:
curl --proxy-cert-type PEM --proxy-cert file -x https://proxy https://example.com

--proxy-cert <cert[:passwd]>-E, --cert for HTTPS proxies.

Example:
curl --proxy-cert file -x https://proxy https://example.com

--proxy-ciphers <list>--ciphers for HTTPS proxies.

curl --proxy-ciphers ECDHE-ECDSA-AES256-CCM8 -x https://proxy https://example.com

--proxy-crlfile <file>--crlfile for HTTPS proxies.

Example:
curl --proxy-crlfile rejects.txt -x https://proxy https://example.com

--proxy-digestUse HTTP Digest authentication with a proxy.

Example:
curl --proxy-digest --proxy-user user:passwd -x proxy https://example.com

--proxy-header <header/@file>-H, --header for proxy communication.

Example:
curl --proxy-header "Host:" -x http://proxy https://example.com

--proxy-insecure-k, --insecure for HTTPS proxies.

Example:
curl --proxy-insecure -x https://proxy https://example.com

--proxy-key-type <type>--key-type for HTTPS proxies.

Example:
curl --proxy-key-type DER --proxy-key here -x https://proxy https://example.com

--proxy-key <key>--key for HTTPS proxies.

Example:
curl --proxy-key here -x https://proxy https://example.com

--proxy-negotiate--negotiate for proxy communication.

Example:
curl --proxy-negotiate --proxy-user user:passwd -x proxy https://example.com

--proxy-ntlmUse HTTP NTLM authentication with a proxy.

Example:
curl --proxy-ntlm --proxy-user user:passwd -x http://proxy https://example.com

--proxy-pass <phrase>--pass for HTTPS proxies.

Example:
curl --proxy-pass secret --proxy-key here -x https://proxy https://example.com

--proxy-pinnedpubkey <hashes>Specify the public key for proxy verification.

Example:
curl --proxy-pinnedpubkey keyfile https://example.com

--proxy-service-name <name>Specify the service name for proxy communication.

Example:
curl --proxy-service-name "shrubbery" -x proxy https://example.com

--proxy-ssl-allow-beast--ssl-allow-beast for HTTPS proxies.

Example:
curl --proxy-ssl-allow-beast -x https://proxy https://example.com

--proxy-ssl-auto-client-cert--ssl-auto-client-cert for HTTPS proxies.

Example:
curl --proxy-ssl-auto-client-cert -x https://proxy https://example.com

--proxy-tls13-ciphers <ciphersuite list>Specifies the list of cipher suites to negotiate TLS 1.3 for proxies.

Example:
curl --proxy-tls13-ciphers TLS_AES_128_GCM_SHA256 -x proxy https://example.com

--proxy-tlsauthtype <type>--tlsauthtype for HTTPS proxies.

Example:
curl --proxy-tlsauthtype SRP -x https://proxy https://example.com

--proxy-tlspassword <string>--tlspassword for HTTPS proxies.

Example:
curl --proxy-tlspassword passwd -x https://proxy https://example.com

--proxy-tlsuser <name>--tlsuser for HTTPS proxies.

Example:
curl --proxy-tlsuser smith -x https://proxy https://example.com

--proxy-tlsv1-1, --tlsv1 for HTTPS proxies.

Example:
curl --proxy-tlsv1 -x https://proxy https://example.com

-U, --proxy-user <user:password>Specify the username and password for authenticating with a proxy.

Example:
curl --proxy-user name:pwd -x proxy https://example.com

-x, --proxy [protocol://]host[:port]Specify a proxy to use.

Example:
curl --proxy http://proxy.example https://example.com

--proxy1.0 <host[:port]>Specify an HTTP 1.0 proxy to use.

Example:
curl --proxy1.0 -x http://proxy https://example.com

-p, --proxytunnelCreate a proxy tunnel.

Example:
curl --proxytunnel -x http://proxy https://example.com

--pubkey <key>Provide a file containing a public key.

Example:
curl --pubkey file.pub sftp://example.com/

-Q, --quote <command>Send a command to an FTP or SFTP server to be executed before the transfer.

Example:
curl --quote "rm file" ftp://example.com/foo

--random-file <file>Specify a file containing random data. This file will be used for seeding the random engine.

Example:
curl --random-file rubbish https://example.com

-r, --range <range>Obtain a range of bytes.

Example:
curl --range 40-80 https://example.com

--rawDisable HTTP content decoding and obtain raw data.

Example:
curl --raw https://example.com

-e, --referer <URL>Send Referrer Page information.

Example:
curl --referer "https://test.example" https://example.com

-J, --remote-header-nameUse the header name specified by the server instead of obtaining it from the URL.

Example:
curl -OJ https://example.com/file

-O, --remote-nameSpecify that the local fileshould have the name of the remote file that was downloaded.

Example:
curl -O https://example.com/filename

--remote-name-allApply the -O, --remote-name option to all the URLs.

Example:
curl --remote-name-all ftp://example.com/file1 ftp://example.com/file2

-R, --remote-timeSpecify that the local fileshould have the timestamp of the remote file that was downloaded.

Example:
curl --remote-time -o foo https://example.com

--request-target <path>Specify an alternative target path.

Example:
curl --request-target "*" -X OPTIONS https://example.com

-X, --request <command>Specify a request method for communication with the server.

Example:
curl -X "DELETE" https://example.com

--resolve <[+]host:port:addr[,addr]...>Specify a custom address for a host/port.

Example:
curl --resolve example.com:443:127.0.0.1 https://example.com

--retry-all-errorsForce retrying on all errors.

Example:
curl --retry-all-errors https://example.com

--retry-connrefusedAdd ECONNREFUSED to the list of errors that are eligible for --retry.

Example:
curl --retry-connrefused --retry https://example.com

--retry-delay <seconds>Specify the amount of time between retries.

Example:
curl --retry-delay 5 --retry https://example.com

--retry-max-time <seconds>Specify the maximum amount of time for --retry attempts.

Example:
curl --retry-max-time 30 --retry 10 https://example.com

--retry <num>Specify the number of retries after curl encounters an error.

Example:
curl --retry 7 https://example.com

--sasl-authzid <identity>Specify an additional authentication identity for SASL PLAIN authentication.

Example:
curl --sasl-authzid zid imap://example.com/

--sasl-irEnable initial response during SASL authentication.

Example:
curl --sasl-ir imap://example.com/

--service-name <name>Specify the SPNEGO service name.

Example:
curl --service-name sockd/server https://example.com

-s, --silentTurn on the silent mode. This option mutes curl.

Example:
curl -s https://example.com

-S, --show-errorShow an error message event with the -s, --silent option enabled.

Example:
curl --show-error --silent https://example.com

--socks4 <host[:port]>Specify a SOCKS4 proxy.

Example:
curl --socks4 hostname:4096 https://example.com

--socks4a <host[:port]>Specify a SOCKS4a proxy.

Example:
curl --socks4a hostname:4096 https://example.com

--socks5-basicUse the basic authentication method (username/password) with a SOCKS5 proxy.

Example:
curl --socks5-basic --socks5 hostname:4096 https://example.com

--socks5-gssapi-necAllow protection mode negotiation to be unprotected.

Example:
curl --socks5-gssapi-nec --socks5 hostname:4096 https://example.com

--socks5-gssapi-service <name>Change the name of a socks server.

Example:
curl --socks5-gssapi-service sockd --socks5 hostname:4096 https://example.com

--socks5-gssapiUse GSS-API authentication with a SOCKS5 proxy.

Example:
curl --socks5-gssapi --socks5 hostname:4096 https://example.com

--socks5-hostname <host[:port]>Specify the SOCKS5 proxy to use.

Example:
curl --socks5-hostname proxy.example:7000 https://example.com

--socks5 <host[:port]>Specify the SOCKS5 proxy to use. The hostname is resolved locally.

Example:
curl --socks5 proxy.example:7000 https://example.com

-Y, --speed-limit <speed>Set the lower limit for the download speed.

Example:
curl --speed-limit 300 --speed-time 10 https://example.com

-y, --speed-time <seconds>Set the time period for the speed limit measurement.

Example:
curl --speed-limit 300 --speed-time 10 https://example.com

--ssl-allow-beastTell curl to ignore the BEAST security flaw in the SSL3 and TLS1.0 protocols.

Example:
curl --ssl-allow-beast https://example.com

--ssl-auto-client-certObtain and use a client certificate automatically.

Example:
curl --ssl-auto-client-cert https://example.com

--ssl-no-revokeDo not check for certificate revocation.

Example:
curl --ssl-no-revoke https://example.com

--ssl-reqdRequire SSL/TLS.

Example:
curl --ssl-reqd ftp://example.com

--ssl-revoke-best-effortIgnore certificate revocation checks if they fail because of missing distribution points.

Example:
curl --ssl-revoke-best-effort https://example.com

--sslAttempt to use SSL.

Example:
curl --ssl pop3://example.com/

-2, --sslv2Use SSLv2. Newer curl versions ignore this request due to security concerns with SSLv2.

Example:
curl --sslv2 https://example.com

-3, --sslv3Use SSLv3. Newer curl versions ignore this request due to security concerns with SSLv3.

Example:
curl --sslv3 https://example.com

--stderr <file>Output stderr to a file. The (-) symbol tells curl to output stderr to stdout.

Example:
curl --stderr output.txt https://example.com

--styled-outputEnable bold fonts for HTTP header terminal output.

curl --styled-output -I https://example.com

--suppress-connect-headersPrevent curl from outputting CONNECT headers.

Example:
curl --suppress-connect-headers --include -x proxy https://example.com

--tcp-fastopenEnable TCP Fast Open.

Example:
curl --tcp-fastopen https://example.com

--tcp-nodelayEnable TCP_NODELAY.

Example:
curl --tcp-nodelay https://example.com

-t, --telnet-option <opt=val>Pass the TTYPE, XDISPLOC, and NEW_ENV options to the telnet protocol.

Example:
curl -t TTYPE=vt100 telnet://example.com/

--tftp-blksize <value>Set the value of TFTP BLKSIZE. Must be a value larger than 512.

Example:
curl --tftp-blksize 1024 tftp://example.com/file

--tftp-no-optionsPrevents curl from sending requests for TFTP options.

Example:
curl --tftp-no-options tftp://192.168.0.1/

-z, --time-cond <time>Request a document that was modified after a certain date and time. For documents modified before the time, prefix the date expression with a dash.

Example:
curl -z "Wed 01 Sep 2021 12:18:00" https://example.com--tls-max <VERSION>Specify the newest supported TLS version.

Example:
curl --tls-max 1.2 https://example.com

--tls13-ciphers <ciphersuite list>Specifies the list of cipher suites to use in negotiating TLS 1.3

Example:
curl --tls13-ciphers TLS_AES_128_GCM_SHA256 https://example.com

--tlsauthtype <type>Specify the TLS authentication type.

Example:
curl --tlsauthtype SRP https://example.com

--tlspassword <string>Specify the TLS password.

Example:
curl --tlspassword pwd --tlsuser user https://example.com

--tlsuser <name>Specify the TLS username.

Example:
curl --tlspassword pwd --tlsuser user https://example.com

--tlsv1.0Tell curl to use TLS 1.0 or newer.

Example:
curl --tlsv1.0 https://example.com

--tlsv1.1Tell curl to use TLS 1.1 or newer.

Example:
curl --tlsv1.1 https://example.com

--tlsv1.2Tell curl to use TLS 1.2 or newer.

Example:
curl --tlsv1.2 https://example.com

--tlsv1.3Tell curl to use TLS1.3 or newer.

Example:
curl --tlsv1.3 https://example.com

-1, --tlsv1Specify that curl should use at least 1.x version of TLS.

Example:
curl --tlsv1 https://example.com

--tr-encodingAsk for a compressed Transfer-Encoding response.

Example:
curl --tr-encoding https://example.com

--trace-ascii <file>Enable a full trace dump to a file.Eliminates the hex part and shows only ASCII.

Example:
curl --trace-ascii log.txt https://example.com

--trace-timeRequire a time stamp on each trace or verbose line.

Example:
curl --trace-time --trace-ascii output https://example.com

--trace <file>Enable a full trace dump to a file.

Example:
curl --trace log.txt https://example.com

--unix-socket <path>Specify a Unix socket path.

Example:
curl --unix-socket socket-path https://example.com

-T, --upload-file <file>Upload a file to the URL.

Example:
curl -T "img[1-1000].png" ftp://ftp.example.com/

--url <url>Provide a URL to be fetched.

Example:
curl --url https://example.com

-B, --use-asciiEnable ASCII transfer.

Example:
curl -B ftp://example.com/README

-A, --user-agent <name>Specify the user agent name.

Example:
curl -A "Agent 007" https://example.com

-u, --user <user:password>Provide the username and password for authentication.

Example:
curl -u user:secret https://example.com

-v, --verboseTell curl to be verbose.

Example:
curl --verbose https://example.com

-V, --versionSee the installed versions of curl and libcurl.

Example:
curl --version

-w, --write-out <format>Tell curl to show information about the completed transfer on stdout.

Example:
curl -w '%{http_code}\n' https://example.com

--xattrStore file metadata in file attributes.

Example:
curl --xattr -o storage https://example.com