Problems using CURl to request on Ubuntu server

[AnneBlair]

Hello there! I encountered a problem in the process of using it! I wonder if I can find the answer here;
It is no problem to run locally on Mac when using CURl request, but errorcode 77 error appears when running on Ubuntu, I do n’t know where to solve this error problem, is it a firewall problem or what,
The swift service is port 8181.
Ubuntu version is 18