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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 private key	openssl genrsa -out key.pem 2048	Generate a 2048-bit RSA private key
📄 Create Certificate Signing Request	openssl req -new -key key.pem -out csr.pem	Generate a CSR for a private key
🔍 View certificate details	openssl x509 -in cert.pem -text -noout	Display certificate information in human-readable form
🔗 Test TLS connection	openssl s_client -connect example.com:443	Connect to a TLS server and show certificate chain
🔑 Compute file digest	openssl dgst -sha256 file.txt	Compute SHA-256 hash of a file
🔒 Encrypt file with password	openssl enc -aes-256-cbc -salt -in file.txt -out file.enc	Encrypt a file using AES-256-CBC with a password
🔓 Decrypt file	openssl enc -d -aes-256-cbc -in file.enc -out file.txt	Decrypt a file encrypted with AES-256-CBC
📦 Create PKCS#12 keystore	openssl pkcs12 -export -out keystore.p12 -inkey key.pem -in cert.pem	Package private key and certificate into PKCS#12 format
🔍 Check OpenSSL version	openssl version	Display the OpenSSL version number
📋 List available ciphers	openssl ciphers -v	List all available cipher suites with details

📖 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