openssl rsa

• openssl rsa -in example.org.key -noout -text
• openssl rsa -in example.org.key -pubout -out example.org.pubkey
• openssl rsa -in example.org.pubkey -pubin -noout -text
• openssl rsa -in mykey.pem -pubout > mykey.pub

Related commands

• openssl genrsa
• openssl req -new -key example.org.key -out example.org.csr

See also

• 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
• 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: RSA, ECDSA, WolfSSL, AES, Diffie-Hellman (DH) key-exchange, /etc/ssl/openssl.cnf, OpenSSL v3