openssl genrsa -aes256 -out ./example.org.key 4096

openssl genrsa -aes256 -out ./example.org.key 4096
Generating RSA private key, 4096 bit long modulus
...................................................................++
........................................................................................++
e is 65537 (0x10001)
Enter pass phrase for ./example.org.key:
Verifying - Enter pass phrase for ./example.org.key:

View created key:

cat example.org.key
-----BEGIN RSA PRIVATE KEY-----
Proc-Type: 4,ENCRYPTED
DEK-Info: AES-256-CBC,F72EFC7CF84D63130FCF594A9AA39CEF

v5UDLE1boeuWN/1iDVH4qnxbYDapU390ts9mIqkahiXf0L/93UTtsQinmD/Watzd
.../...
VBBwBxr4Du7JoCoRXCAtFhnh9t8IO9wV3gApZFh9+sPMN7eG6yrjOc4oR+n0BFnA
-----END RSA PRIVATE KEY-----

Related

• CSR
• ssh-keygen

See also

• openssl rsa, openssl genrsa