openssl genrsa

• openssl genrsa -aes256 -out /path/to/root-ca_key.pem 4096
• openssl genrsa -aes256 -out ./example.org.key 4096
• openssl genrsa -out /path/to/root-ca_key.pem 2048

file root-ca_key.pem
root-ca_key.pem: PEM RSA private key

file example.org.key
example.org.key: PEM RSA private key

Related terms

• pkeyutl
• Generate a public-private key: ssh-keygen
• openssl req -config
• openssl rsa
• CSR
• openssl req -new -key example.org.key -out example.org.csr

See also

• openssl rsa, openssl genrsa
• Public-key cryptography: RSA, DSA, ECDSA, EdDSA (Ed25519), AES, RSA Conference, hash, pkeyutl, Signature, key length, Easyrsa, OAEP, Ron Rivest, Adi Shamir, Leonard Adleman
• openssl [ rand | s_client | passwd | openssl req | openssl rsa | openssl genrsa | openssl x509 | openssl ca | openssl verify | openssl ec | openssl dgst | openssl pkcs12 | openssl asn1parse | openssl help | .cer to .pem, openssl version