Curl can't get the Zcash RPC interface

I use this cmd to get the RPC

curl -U rpc2:z123 -H ‘content-type:text/plain;’ http://localhost:8232/ --data-binary ‘{“jsonrpc”:“1.0”,“id”:“1”,“method”:“listtransactions”,“params”:[“”, 2, 0]}’

the result is

curl: no URL specified!
curl: try ‘curl --help’ or ‘curl --manual’ for more information

who can tell me why? and how to get the RPC interface of zcash ?

OK, I know the answer , i use this cmd and it goes ok!

curl --user userName:passwd -H ‘content-type:text/plain;’ http://XXXX_IP:8332/ --data-binary ‘{“jsonrpc”:“1.0”,“id”:“1”,“method”:“getnewaddress”,“params”:}’

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hi, do you know why the response is empty? thank you!