# ecparam(1ssl) - man - phpMan

[OPENSSL-CMDS(1SSL)](https://www.chedong.com/phpMan.php/man/OPENSSL-CMDS/1SSL/markdown)                             OpenSSL                            [OPENSSL-CMDS(1SSL)](https://www.chedong.com/phpMan.php/man/OPENSSL-CMDS/1SSL/markdown)



## NAME
       asn1parse, ca, ciphers, cms, crl, crl2pkcs7, dgst, dhparam, dsa, dsaparam, ec, ecparam, enc,
       engine, errstr, gendsa, genpkey, genrsa, info, kdf, mac, nseq, ocsp, passwd, pkcs12, pkcs7,
       pkcs8, pkey, pkeyparam, pkeyutl, prime, rand, rehash, req, rsa, rsautl, s_client, s_server,
       s_time, sess_id, smime, speed, spkac, srp, storeutl, ts, verify, version, x509 - OpenSSL
       application commands

## SYNOPSIS
       **openssl** _cmd_ **-help** | [_-option_ | _-option_ _arg_] ... [_arg_] ...

## DESCRIPTION
       Every _cmd_ listed above is a (sub-)command of the [**openssl**(1)](https://www.chedong.com/phpMan.php/man/openssl/1/markdown) application.  It has its own
       detailed manual page at **openssl-[**_c_c_m_m_d_d(1)](https://www.chedong.com/phpMan.php/man/ccmmdd/1/markdown). For example, to view the manual page for the **openssl**
       **dgst** command, type "man openssl-dgst".

## OPTIONS
       Among others, every subcommand has a help option.

### -help
           Print out a usage message for the subcommand.

## SEE ALSO
       [**openssl**(1)](https://www.chedong.com/phpMan.php/man/openssl/1/markdown), [**openssl-asn1parse**(1)](https://www.chedong.com/phpMan.php/man/openssl-asn1parse/1/markdown), [**openssl-ca**(1)](https://www.chedong.com/phpMan.php/man/openssl-ca/1/markdown), [**openssl-ciphers**(1)](https://www.chedong.com/phpMan.php/man/openssl-ciphers/1/markdown), [**openssl-cms**(1)](https://www.chedong.com/phpMan.php/man/openssl-cms/1/markdown),
       [**openssl-crl**(1)](https://www.chedong.com/phpMan.php/man/openssl-crl/1/markdown), [**openssl-crl2pkcs7**(1)](https://www.chedong.com/phpMan.php/man/openssl-crl2pkcs7/1/markdown), [**openssl-dgst**(1)](https://www.chedong.com/phpMan.php/man/openssl-dgst/1/markdown), [**openssl-dhparam**(1)](https://www.chedong.com/phpMan.php/man/openssl-dhparam/1/markdown), [**openssl-dsa**(1)](https://www.chedong.com/phpMan.php/man/openssl-dsa/1/markdown),
       [**openssl-dsaparam**(1)](https://www.chedong.com/phpMan.php/man/openssl-dsaparam/1/markdown), [**openssl-ec**(1)](https://www.chedong.com/phpMan.php/man/openssl-ec/1/markdown), [**openssl-ecparam**(1)](https://www.chedong.com/phpMan.php/man/openssl-ecparam/1/markdown), [**openssl-enc**(1)](https://www.chedong.com/phpMan.php/man/openssl-enc/1/markdown), [**openssl-engine**(1)](https://www.chedong.com/phpMan.php/man/openssl-engine/1/markdown),
       [**openssl-errstr**(1)](https://www.chedong.com/phpMan.php/man/openssl-errstr/1/markdown), [**openssl-gendsa**(1)](https://www.chedong.com/phpMan.php/man/openssl-gendsa/1/markdown), [**openssl-genpkey**(1)](https://www.chedong.com/phpMan.php/man/openssl-genpkey/1/markdown), [**openssl-genrsa**(1)](https://www.chedong.com/phpMan.php/man/openssl-genrsa/1/markdown), [**openssl-info**(1)](https://www.chedong.com/phpMan.php/man/openssl-info/1/markdown),
       [**openssl-kdf**(1)](https://www.chedong.com/phpMan.php/man/openssl-kdf/1/markdown), [**openssl-mac**(1)](https://www.chedong.com/phpMan.php/man/openssl-mac/1/markdown), [**openssl-nseq**(1)](https://www.chedong.com/phpMan.php/man/openssl-nseq/1/markdown), [**openssl-ocsp**(1)](https://www.chedong.com/phpMan.php/man/openssl-ocsp/1/markdown), [**openssl-passwd**(1)](https://www.chedong.com/phpMan.php/man/openssl-passwd/1/markdown),
       [**openssl-pkcs12**(1)](https://www.chedong.com/phpMan.php/man/openssl-pkcs12/1/markdown), [**openssl-pkcs7**(1)](https://www.chedong.com/phpMan.php/man/openssl-pkcs7/1/markdown), [**openssl-pkcs8**(1)](https://www.chedong.com/phpMan.php/man/openssl-pkcs8/1/markdown), [**openssl-pkey**(1)](https://www.chedong.com/phpMan.php/man/openssl-pkey/1/markdown), [**openssl-pkeyparam**(1)](https://www.chedong.com/phpMan.php/man/openssl-pkeyparam/1/markdown),
       [**openssl-pkeyutl**(1)](https://www.chedong.com/phpMan.php/man/openssl-pkeyutl/1/markdown), [**openssl-prime**(1)](https://www.chedong.com/phpMan.php/man/openssl-prime/1/markdown), [**openssl-rand**(1)](https://www.chedong.com/phpMan.php/man/openssl-rand/1/markdown), [**openssl-rehash**(1)](https://www.chedong.com/phpMan.php/man/openssl-rehash/1/markdown), [**openssl-req**(1)](https://www.chedong.com/phpMan.php/man/openssl-req/1/markdown),
       [**openssl-rsa**(1)](https://www.chedong.com/phpMan.php/man/openssl-rsa/1/markdown), [**openssl-rsautl**(1)](https://www.chedong.com/phpMan.php/man/openssl-rsautl/1/markdown), **openssl-s**___**[client**(1)](https://www.chedong.com/phpMan.php/man/client/1/markdown), **openssl-s**___**[server**(1)](https://www.chedong.com/phpMan.php/man/server/1/markdown),
       **openssl-s**___**[time**(1)](https://www.chedong.com/phpMan.php/man/time/1/markdown), **openssl-sess**___**[id**(1)](https://www.chedong.com/phpMan.php/man/id/1/markdown), [**openssl-smime**(1)](https://www.chedong.com/phpMan.php/man/openssl-smime/1/markdown), [**openssl-speed**(1)](https://www.chedong.com/phpMan.php/man/openssl-speed/1/markdown), [**openssl-spkac**(1)](https://www.chedong.com/phpMan.php/man/openssl-spkac/1/markdown),
       [**openssl-srp**(1)](https://www.chedong.com/phpMan.php/man/openssl-srp/1/markdown), [**openssl-storeutl**(1)](https://www.chedong.com/phpMan.php/man/openssl-storeutl/1/markdown), [**openssl-ts**(1)](https://www.chedong.com/phpMan.php/man/openssl-ts/1/markdown), [**openssl-verify**(1)](https://www.chedong.com/phpMan.php/man/openssl-verify/1/markdown), [**openssl-version**(1)](https://www.chedong.com/phpMan.php/man/openssl-version/1/markdown),
       [**openssl-x509**(1)](https://www.chedong.com/phpMan.php/man/openssl-x509/1/markdown),

## HISTORY
       Initially, the manual page entry for the "openssl _cmd"_ command used to be available at
       [_cmd_(1)](https://www.chedong.com/phpMan.php/man/cmd/1/markdown). Later, the alias **openssl-[**_c_c_m_m_d_d(1)](https://www.chedong.com/phpMan.php/man/ccmmdd/1/markdown) was introduced, which made it easier to group the
       openssl commands using the [**apropos**(1)](https://www.chedong.com/phpMan.php/man/apropos/1/markdown) command or the shell's tab completion.

       In order to reduce cluttering of the global manual page namespace, the manual page entries
       without the 'openssl-' prefix have been deprecated in OpenSSL 3.0 and will be removed in
       OpenSSL 4.0.

## COPYRIGHT
       Copyright 2019-2020 The OpenSSL Project Authors. All Rights Reserved.

       Licensed under the Apache License 2.0 (the "License").  You may not use this file except in
       compliance with the License.  You can obtain a copy in the file LICENSE in the source
       distribution or at <<https://www.openssl.org/source/license.html>>.



3.0.2                                        2026-04-07                           [OPENSSL-CMDS(1SSL)](https://www.chedong.com/phpMan.php/man/OPENSSL-CMDS/1SSL/markdown)