Linux: curl

[user@localhost ~]$ curl -<span style="color: #000000;">h
Usage: curl [options...] </span><url><span style="color: #000000;">
Options: (H) means HTTP</span>/<span style="color: #000000;">HTTPS only, (F) means FTP only
     </span>--anyauth       Pick <span style="color: #800000;">"</span><span style="color: #800000;">any</span><span style="color: #800000;">"</span><span style="color: #000000;"> authentication method (H)
 </span>-a, --append        Append to target <span style="color: #0000ff;">file</span> when uploading (F/<span style="color: #000000;">SFTP)
     </span>--<span style="color: #000000;">basic         Use HTTP Basic Authentication (H)
     </span>--<span style="color: #000000;">cacert FILE   CA certificate to verify peer against (SSL)
     </span>--<span style="color: #000000;">capath DIR    CA directory to verify peer against (SSL)
 </span>-E, --cert CERT[:PASSWD] Client certificate <span style="color: #0000ff;">file</span><span style="color: #000000;"> and password (SSL)
     </span>--cert-type TYPE Certificate <span style="color: #0000ff;">file</span> type (DER/PEM/<span style="color: #000000;">ENG) (SSL)
     </span>--<span style="color: #000000;">ciphers LIST  SSL ciphers to use (SSL)
     </span>--compressed    Request compressed response (using deflate or <span style="color: #0000ff;">gzip</span><span style="color: #000000;">)
 </span>-K, --config FILE   Specify <span style="color: #0000ff;">which</span> config <span style="color: #0000ff;">file</span><span style="color: #000000;"> to read
     </span>--connect-timeout SECONDS  Maximum <span style="color: #0000ff;">time</span> allowed <span style="color: #0000ff;">for</span><span style="color: #000000;"> connection
 </span>-C, --continue-<span style="color: #000000;">at OFFSET  Resumed transfer offset
 </span>-b, --cookie STRING/FILE  String or <span style="color: #0000ff;">file</span><span style="color: #000000;"> to read cookies from (H)
 </span>-c, --cookie-jar FILE  Write cookies to this <span style="color: #0000ff;">file</span><span style="color: #000000;"> after operation (H)
     </span>--create-<span style="color: #000000;">dirs   Create necessary local directory hierarchy
     </span>--crlf          Convert LF to CRLF <span style="color: #0000ff;">in</span><span style="color: #000000;"> upload
     </span>--crlfile FILE  Get a CRL list <span style="color: #0000ff;">in</span> PEM format from the given <span style="color: #0000ff;">file</span>
 -d, --<span style="color: #000000;">data DATA     HTTP POST data (H)
     </span>--data-<span style="color: #000000;">ascii DATA  HTTP POST ASCII data (H)
     </span>--data-<span style="color: #000000;">binary DATA  HTTP POST binary data (H)
     </span>--data-<span style="color: #000000;">urlencode DATA  HTTP POST data url encoded (H)
     </span>--delegation STRING GSS-<span style="color: #000000;">API delegation permission
     </span>--<span style="color: #000000;">digest        Use HTTP Digest Authentication (H)
     </span>--disable-<span style="color: #000000;">eprt  Inhibit using EPRT or LPRT (F)
     </span>--disable-<span style="color: #000000;">epsv  Inhibit using EPSV (F)
 </span>-D, --dump-header FILE  Write the headers to this <span style="color: #0000ff;">file</span>
     --egd-<span style="color: #0000ff;">file</span> FILE  EGD socket path <span style="color: #0000ff;">for</span><span style="color: #000000;"> random data (SSL)
     </span>--engine ENGINGE  Crypto engine (SSL). <span style="color: #800000;">"</span><span style="color: #800000;">--engine list</span><span style="color: #800000;">"</span> <span style="color: #0000ff;">for</span><span style="color: #000000;"> list
 </span>-f, --<span style="color: #000000;">fail          Fail silently (no output at all) on HTTP errors (H)
 </span>-F, --<span style="color: #000000;">form CONTENT  Specify HTTP multipart POST data (H)
     </span>--form-<span style="color: #0000ff;">string</span><span style="color: #000000;"> STRING  Specify HTTP multipart POST data (H)
     </span>--<span style="color: #0000ff;">ftp</span>-account DATA  Account data <span style="color: #0000ff;">string</span><span style="color: #000000;"> (F)
     </span>--<span style="color: #0000ff;">ftp</span>-alternative-to-user COMMAND  String to replace <span style="color: #800000;">"</span><span style="color: #800000;">USER [name]</span><span style="color: #800000;">"</span><span style="color: #000000;"> (F)
     </span>--<span style="color: #0000ff;">ftp</span>-create-dirs  Create the remote dirs <span style="color: #0000ff;">if</span><span style="color: #000000;"> not present (F)
     </span>--<span style="color: #0000ff;">ftp</span>-method [MULTICWD/NOCWD/<span style="color: #000000;">SINGLECWD] Control CWD usage (F)
     </span>--<span style="color: #0000ff;">ftp</span>-pasv      Use PASV/<span style="color: #000000;">EPSV instead of PORT (F)
 </span>-P, --<span style="color: #0000ff;">ftp</span>-<span style="color: #000000;">port ADR  Use PORT with given address instead of PASV (F)
     </span>--<span style="color: #0000ff;">ftp</span>-skip-pasv-ip Skip the IP address <span style="color: #0000ff;">for</span><span style="color: #000000;"> PASV (F)
     </span>--<span style="color: #0000ff;">ftp</span>-pret      Send PRET before PASV (<span style="color: #0000ff;">for</span><span style="color: #000000;"> drftpd) (F)
     </span>--<span style="color: #0000ff;">ftp</span>-ssl-<span style="color: #000000;">ccc   Send CCC after authenticating (F)
     </span>--<span style="color: #0000ff;">ftp</span>-ssl-ccc-mode ACTIVE/<span style="color: #000000;">PASSIVE  Set CCC mode (F)
     </span>--<span style="color: #0000ff;">ftp</span>-ssl-control Require SSL/TLS <span style="color: #0000ff;">for</span> <span style="color: #0000ff;">ftp</span> <span style="color: #0000ff;">login</span>, <span style="color: #0000ff;">clear</span> <span style="color: #0000ff;">for</span><span style="color: #000000;"> transfer (F)
 </span>-G, --get           Send the -<span style="color: #000000;">d data with a HTTP GET (H)
 </span>-g, --<span style="color: #000000;">globoff       Disable URL sequences and ranges using {} and []
 </span>-H, --<span style="color: #000000;">header LINE   Custom header to pass to server (H)
 </span>-I, --<span style="color: #0000ff;">head</span>          Show document <span style="color: #0000ff;">info</span><span style="color: #000000;"> only
 </span>-h, --<span style="color: #000000;">help          This help text
     </span>--hostpubmd5 MD5  Hex encoded MD5 <span style="color: #0000ff;">string</span><span style="color: #000000;"> of the host public key. (SSH)
 </span>-<span style="color: #800080;">0</span>, --http1.<span style="color: #800080;">0</span>       Use HTTP <span style="color: #800080;">1.0</span><span style="color: #000000;"> (H)
     </span>--ignore-content-length  Ignore the HTTP Content-<span style="color: #000000;">Length header
 </span>-i, --include       Include protocol headers <span style="color: #0000ff;">in</span> the output (H/<span style="color: #000000;">F)
 </span>-k, --<span style="color: #000000;">insecure      Allow connections to SSL sites without certs (H)
     </span>--interface INTERFACE  Specify network interface/<span style="color: #000000;">address to use
 </span>-<span style="color: #800080;">4</span>, --<span style="color: #000000;">ipv4          Resolve name to IPv4 address
 </span>-<span style="color: #800080;">6</span>, --<span style="color: #000000;">ipv6          Resolve name to IPv6 address
 </span>-j, --junk-session-cookies Ignore session cookies read from <span style="color: #0000ff;">file</span><span style="color: #000000;"> (H)
     </span>--keepalive-<span style="color: #0000ff;">time</span><span style="color: #000000;"> SECONDS  Interval between keepalive probes
     </span>--key KEY       Private key <span style="color: #0000ff;">file</span> name (SSL/<span style="color: #000000;">SSH)
     </span>--key-type TYPE Private key <span style="color: #0000ff;">file</span> type (DER/PEM/<span style="color: #000000;">ENG) (SSL)
     </span>--<span style="color: #000000;">krb LEVEL     Enable Kerberos with specified security level (F)
     </span>--<span style="color: #000000;">libcurl FILE  Dump libcurl equivalent code of this command line
     </span>--limit-<span style="color: #000000;">rate RATE  Limit transfer speed to this rate
 </span>-l, --list-<span style="color: #000000;">only     List only names of an FTP directory (F)
     </span>--local-<span style="color: #000000;">port RANGE  Force use of these local port numbers
 </span>-L, --<span style="color: #000000;">location      Follow redirects (H)
     </span>--location-trusted like --<span style="color: #000000;">location and send auth to other hosts (H)
 </span>-M, --<span style="color: #000000;">manual        Display the full manual
     </span>--mail-<span style="color: #000000;">from FROM  Mail from this address
     </span>--mail-<span style="color: #000000;">rcpt TO  Mail to this receiver(s)
     </span>--mail-<span style="color: #000000;">auth AUTH  Originator address of the original email
     </span>--max-filesize BYTES  Maximum <span style="color: #0000ff;">file</span> size to download (H/<span style="color: #000000;">F)
     </span>--max-<span style="color: #000000;">redirs NUM  Maximum number of redirects allowed (H)
 </span>-m, --max-<span style="color: #0000ff;">time</span> SECONDS  Maximum <span style="color: #0000ff;">time</span> allowed <span style="color: #0000ff;">for</span><span style="color: #000000;"> the transfer
     </span>--metalink      Process given URLs as metalink XML <span style="color: #0000ff;">file</span>
     --<span style="color: #000000;">negotiate     Use HTTP Negotiate Authentication (H)
 </span>-n, --netrc         Must read .netrc <span style="color: #0000ff;">for</span><span style="color: #000000;"> user name and password
     </span>--netrc-optional Use either .netrc or URL; overrides -<span style="color: #000000;">n
     </span>--netrc-<span style="color: #0000ff;">file</span><span style="color: #000000;"> FILE  Set up the netrc filename to use
 </span>-N, --no-<span style="color: #000000;">buffer     Disable buffering of the output stream
     </span>--no-<span style="color: #000000;">keepalive  Disable keepalive use on the connection
     </span>--no-sessionid  Disable SSL session-<span style="color: #000000;">ID reusing (SSL)
     </span>--noproxy       List of hosts <span style="color: #0000ff;">which</span> <span style="color: #0000ff;">do</span><span style="color: #000000;"> not use proxy
     </span>--<span style="color: #000000;">ntlm          Use HTTP NTLM authentication (H)
 </span>-o, --output FILE   Write output to <<span style="color: #0000ff;">file</span>><span style="color: #000000;"> instead of stdout
     </span>--pass PASS     Pass phrase <span style="color: #0000ff;">for</span> the private key (SSL/<span style="color: #000000;">SSH)
     </span>--post301       Do not switch to GET after following a <span style="color: #800080;">301</span><span style="color: #000000;"> redirect (H)
     </span>--post302       Do not switch to GET after following a <span style="color: #800080;">302</span><span style="color: #000000;"> redirect (H)
     </span>--post303       Do not switch to GET after following a <span style="color: #800080;">303</span><span style="color: #000000;"> redirect (H)
 </span>-#, --progress-<span style="color: #000000;">bar  Display transfer progress as a progress bar
     </span>--proto PROTOCOLS  Enable/<span style="color: #000000;">disable specified protocols
     </span>--proto-redir PROTOCOLS  Enable/<span style="color: #000000;">disable specified protocols on redirect
 </span>-x, --proxy [PROTOCOL:<span style="color: #008000;">//</span><span style="color: #008000;">]HOST[:PORT] Use proxy on given port</span>
     --proxy-anyauth Pick <span style="color: #800000;">"</span><span style="color: #800000;">any</span><span style="color: #800000;">"</span><span style="color: #000000;"> proxy authentication method (H)
     </span>--proxy-<span style="color: #000000;">basic   Use Basic authentication on the proxy (H)
     </span>--proxy-<span style="color: #000000;">digest  Use Digest authentication on the proxy (H)
     </span>--proxy-<span style="color: #000000;">negotiate Use Negotiate authentication on the proxy (H)
     </span>--proxy-<span style="color: #000000;">ntlm    Use NTLM authentication on the proxy (H)
 </span>-U, --proxy-<span style="color: #000000;">user USER[:PASSWORD]  Proxy user and password
     </span>--proxy1.<span style="color: #800080;">0</span> HOST[:PORT]  Use HTTP/<span style="color: #800080;">1.0</span><span style="color: #000000;"> proxy on given port
 </span>-p, --<span style="color: #000000;">proxytunnel   Operate through a HTTP proxy tunnel (using CONNECT)
     </span>--pubkey KEY    Public key <span style="color: #0000ff;">file</span><span style="color: #000000;"> name (SSH)
 </span>-Q, --quote CMD     Send command(s) to server before transfer (F/<span style="color: #000000;">SFTP)
     </span>--random-<span style="color: #0000ff;">file</span> FILE  File <span style="color: #0000ff;">for</span><span style="color: #000000;"> reading random data from (SSL)
 </span>-r, --<span style="color: #000000;">range RANGE   Retrieve only the bytes within a range
     </span>--raw           Do HTTP <span style="color: #800000;">"</span><span style="color: #800000;">raw</span><span style="color: #800000;">"</span><span style="color: #000000;">, without any transfer decoding (H)
 </span>-e, --<span style="color: #000000;">referer       Referer URL (H)
 </span>-J, --remote-header-name Use the header-<span style="color: #000000;">provided filename (H)
 </span>-O, --remote-name   Write output to a <span style="color: #0000ff;">file</span> named as the remote <span style="color: #0000ff;">file</span>
     --remote-name-all Use the remote <span style="color: #0000ff;">file</span> name <span style="color: #0000ff;">for</span><span style="color: #000000;"> all URLs
 </span>-R, --remote-<span style="color: #0000ff;">time</span>   Set the remote <span style="color: #0000ff;">file</span><span style="color: #800000;">'</span><span style="color: #800000;">s time on the local output</span>
 -X, --<span style="color: #000000;">request COMMAND  Specify request command to use
     </span>--<span style="color: #000000;">resolve HOST:PORT:ADDRESS  Force resolve of HOST:PORT to ADDRESS
     </span>--retry NUM   Retry request NUM times <span style="color: #0000ff;">if</span><span style="color: #000000;"> transient problems occur
     </span>--retry-delay SECONDS When retrying, <span style="color: #0000ff;">wait</span><span style="color: #000000;"> this many seconds between each
     </span>--retry-max-<span style="color: #0000ff;">time</span><span style="color: #000000;"> SECONDS  Retry only within this period
 </span>-S, --show-error    Show error. With -s, <span style="color: #0000ff;">make</span><span style="color: #000000;"> curl show errors when they occur
 </span>-s, --silent        Silent mode. Don<span style="color: #800000;">'</span><span style="color: #800000;">t output anything</span>
     --socks4 HOST[:PORT]  SOCKS4 proxy on given host +<span style="color: #000000;"> port
     </span>--socks4a HOST[:PORT]  SOCKS4a proxy on given host +<span style="color: #000000;"> port
     </span>--socks5 HOST[:PORT]  SOCKS5 proxy on given host +<span style="color: #000000;"> port
     </span>--socks5-<span style="color: #0000ff;">hostname</span><span style="color: #000000;"> HOST[:PORT] SOCKS5 proxy, pass host name to proxy
     </span>--socks5-gssapi-service NAME  SOCKS5 proxy service name <span style="color: #0000ff;">for</span><span style="color: #000000;"> gssapi
     </span>--socks5-gssapi-<span style="color: #000000;">nec  Compatibility with NEC SOCKS5 server
 </span>-Y, --speed-limit RATE  Stop transfers below speed-limit <span style="color: #0000ff;">for</span> <span style="color: #800000;">'</span><span style="color: #800000;">speed-time</span><span style="color: #800000;">'</span><span style="color: #000000;"> secs
 </span>-y, --speed-<span style="color: #0000ff;">time</span> SECONDS  Time <span style="color: #0000ff;">for</span> trig speed-limit abort. Defaults to <span style="color: #800080;">30</span>
     --ssl           Try SSL/<span style="color: #000000;">TLS (FTP, IMAP, POP3, SMTP)
     </span>--ssl-reqd      Require SSL/<span style="color: #000000;">TLS (FTP, IMAP, POP3, SMTP)
 </span>-<span style="color: #800080;">2</span>, --<span style="color: #000000;">sslv2         Use SSLv2 (SSL)
 </span>-<span style="color: #800080;">3</span>, --<span style="color: #000000;">sslv3         Use SSLv3 (SSL)
     </span>--ssl-allow-<span style="color: #000000;">beast Allow security flaw to improve interop (SSL)
     </span>--stderr FILE   Where to redirect stderr. -<span style="color: #000000;"> means stdout
     </span>--tcp-<span style="color: #000000;">nodelay   Use the TCP_NODELAY option
 </span>-t, --telnet-option OPT=<span style="color: #000000;">VAL  Set telnet option
     </span>--tftp-blksize VALUE  Set TFTP BLKSIZE option (must be ><span style="color: #800080;">512</span><span style="color: #000000;">)
 </span>-z, --<span style="color: #0000ff;">time</span>-cond TIME  Transfer based on a <span style="color: #0000ff;">time</span><span style="color: #000000;"> condition
 </span>-<span style="color: #800080;">1</span>, --tlsv1         Use =><span style="color: #000000;"> TLSv1 (SSL)
     </span>--tlsv1.<span style="color: #800080;">0</span>       Use TLSv1.<span style="color: #800080;">0</span><span style="color: #000000;"> (SSL)
     </span>--tlsv1.<span style="color: #800080;">1</span>       Use TLSv1.<span style="color: #800080;">1</span><span style="color: #000000;"> (SSL)
     </span>--tlsv1.<span style="color: #800080;">2</span>       Use TLSv1.<span style="color: #800080;">2</span><span style="color: #000000;"> (SSL)
     </span>--trace FILE    Write a debug trace to the given <span style="color: #0000ff;">file</span>
     --trace-ascii FILE  Like --<span style="color: #000000;">trace but without the hex output
     </span>--trace-<span style="color: #0000ff;">time</span>    Add <span style="color: #0000ff;">time</span> stamps to trace/<span style="color: #000000;">verbose output
     </span>--<span style="color: #0000ff;">tr</span>-<span style="color: #000000;">encoding   Request compressed transfer encoding (H)
 </span>-T, --upload-<span style="color: #0000ff;">file</span><span style="color: #000000;"> FILE  Transfer FILE to destination
     </span>--<span style="color: #000000;">url URL       URL to work with
 </span>-B, --use-ascii     Use ASCII/<span style="color: #000000;">text transfer
 </span>-u, --<span style="color: #000000;">user USER[:PASSWORD]  Server user and password
     </span>--<span style="color: #000000;">tlsuser USER  TLS username
     </span>--<span style="color: #000000;">tlspassword STRING TLS password
     </span>--<span style="color: #000000;">tlsauthtype STRING  TLS authentication type (default SRP)
     </span>--unix-<span style="color: #000000;">socket FILE    Connect through this UNIX domain socket
 </span>-A, --user-agent STRING  User-<span style="color: #000000;">Agent to send to server (H)
 </span>-v, --verbose       Make the operation <span style="color: #0000ff;">more</span><span style="color: #000000;"> talkative
 </span>-V, --<span style="color: #000000;">version       Show version number and quit
 </span>-<span style="color: #0000ff;">w</span>, --<span style="color: #0000ff;">write</span>-<span style="color: #000000;">out FORMAT  What to output after completion
     </span>--xattr        Store metadata <span style="color: #0000ff;">in</span> extended <span style="color: #0000ff;">file</span><span style="color: #000000;"> attributes
 </span>-q                 If used as the first parameter disables .curlrc