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📜 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

🚀 Quick Reference

Use Case	Command	Description
🔑 Generate RSA key pair	openssl genrsa -out key.pem 2048	Create a 2048-bit RSA private key
📄 Create Certificate Signing Request	openssl req -new -key key.pem -out req.pem	Generate a CSR for a new certificate
🔍 View certificate details	openssl x509 -in cert.pem -text -noout	Display the content of a certificate
🔐 Hash data	openssl dgst -sha256 file.txt	Compute SHA-256 digest of a file
🧹 Encrypt/decrypt file	openssl enc -aes-256-cbc -in plain.txt -out encrypted.enc	Symmetric encryption using AES-256
🌐 Test TLS connection	openssl s_client -connect example.com:443	Connect to a TLS server for debugging
🖥️ Run TLS test server	openssl s_server -cert cert.pem -key key.pem	Start a test TLS server
📦 Convert PKCS#12 to PEM	openssl pkcs12 -in bundle.p12 -out bundle.pem -nodes	Extract private key and certificates from a PFX file
🔄 Verify certificate chain	openssl verify -CAfile ca.pem cert.pem	Check a certificate against a CA bundle
⚡ Benchmark performance	openssl speed -evp aes-256-gcm	Measure cryptographic algorithm speed

📋 SYNOPSIS

openssl cmd -help | [-option | -option arg] ... [arg] ...

📝 DESCRIPTION

Every cmd listed above is a (sub-)command of the openssl(1) application. It has its own detailed manual page at openssl-cmd(1). 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), openssl-asn1parse(1), openssl-ca(1), openssl-ciphers(1), openssl-cms(1), openssl-crl(1), openssl-crl2pkcs7(1), openssl-dgst(1), openssl-dhparam(1), openssl-dsa(1), openssl-dsaparam(1), openssl-ec(1), openssl-ecparam(1), openssl-enc(1), openssl-engine(1), openssl-errstr(1), openssl-gendsa(1), openssl-genpkey(1), openssl-genrsa(1), openssl-info(1), openssl-kdf(1), openssl-mac(1), openssl-nseq(1), openssl-ocsp(1), openssl-passwd(1), openssl-pkcs12(1), openssl-pkcs7(1), openssl-pkcs8(1), openssl-pkey(1), openssl-pkeyparam(1), openssl-pkeyutl(1), openssl-prime(1), openssl-rand(1), openssl-rehash(1), openssl-req(1), openssl-rsa(1), openssl-rsautl(1), openssl-s_client(1), openssl-s_server(1), openssl-s_time(1), openssl-sess_id(1), openssl-smime(1), openssl-speed(1), openssl-spkac(1), openssl-srp(1), openssl-storeutl(1), openssl-ts(1), openssl-verify(1), openssl-version(1), openssl-x509(1),

📜 HISTORY

Initially, the manual page entry for the "openssl cmd" command used to be available at cmd(1). Later, the alias openssl-cmd(1) was introduced, which made it easier to group the openssl commands using the apropos(1) 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>.

📜 NAME 🚀 Quick Reference 📋 SYNOPSIS 📝 DESCRIPTION ⚙️ OPTIONS 🔗 SEE ALSO 📜 HISTORY ©️ COPYRIGHT