1 Long: cert-type 2 Protocols: TLS 3 Arg: <type> 4 Help: Certificate file type 5 See-also: cert key key-type 6 --- 7 Tells curl what type the provided client certificate is using. PEM, DER, ENG 8 and P12 are recognized types. If not specified, PEM is assumed. 9 10 If this option is used several times, the last one will be used. 11