1 Long: proto-default 2 Help: Use PROTOCOL for any URL missing a scheme 3 Arg: <protocol> 4 Added: 7.45.0 5 Category: connection curl 6 --- 7 Tells curl to use *protocol* for any URL missing a scheme name. 8 9 Example: 10 11 curl --proto-default https ftp.mozilla.org 12 13 An unknown or unsupported protocol causes error 14 *CURLE_UNSUPPORTED_PROTOCOL* (1). 15 16 This option does not change the default proxy protocol (http). 17 18 Without this option curl would make a guess based on the host, see --url for 19 details. 20