postgresql - 尝试连接到 postgresql 时连接被拒绝

Question

#Edit 抱歉，它没有连接到 PostgreSQL，但我正在尝试连接到物化 shell，但出现如下错误

 psql: could not connect to server: Connection refused
    Is the server running on host "localhost" (::1) and accepting
    TCP/IP connections on port 6875?
could not connect to server: Connection refused
    Is the server running on host "localhost" (127.0.0.1) and accepting
    TCP/IP connections on port 6875? 

我该如何解决这个问题？

谢谢。