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How to Generate a Private Key and CSR from Command Line | Use the following command to generate a private key and certificate signing request (CSR): $ openssl req -new -newkey rsa:2048 -nodes -keyout server_private.key -out server_csr.csr In the dialog that follows, pay particular attention to the CommonName (CN) indication. If you need a certificate for example.com, use example.com (exactly) as the CN. For example, if you