SSL: Generating self-signed certificates with one openssl command
One command to generate SSL certificate with SAN (Subject Alternative Name).
openssl req -x509 -newkey rsa:4096 -sha256 -days 3650 \
-nodes -keyout example.key -out example.crt \
-subj "/CN=example.com" \
-addext "subjectAltName=DNS:example.com,DNS:www.example.com,IP:127.0.0.1"
Documentation:
https://www.openssl.org/docs/man1.1.1/man1/openssl-req.html