1 Long: key-type 2 Arg: <type> 3 Help: Private key file type (DER/PEM/ENG) 4 Protocols: TLS 5 --- 6 Private key file type. Specify which type your --key provided private key 7 is. DER, PEM, and ENG are supported. If not specified, PEM is assumed. 8 9 If this option is used several times, the last one will be used. 10