How to create OpenSSL certificates/Key in your system through cmd openssl req -x509 -newkey rsa:4096 -nodes -keyout key.pem -out cert.pem -days 365
openssl -> to initialize openssl in your system req -> to generate a certificate request -x509 -> to generate a self-signed certificate -newkey -> to generate a new key rsa:4096 -> to generate a new key with strongest algorithm and a key length of 4096 bits -nodes -> to generate a new key without a passphrase/password -keyout -> to save the key to a file key.pem -> to save the key to a file called key.pem where pem is the extension -out -> to save the certificate to a file cert.pem -> to save the certificate to a file called cert.pem where pem is the extension -days 365-> to set the validity of the certificate to 365 days