Postgresql 服务器正在本地机器上运行，但 psql 无法连接答案

【问题标题】：Postgresql server is running on local machine but psql can not connectPostgresql 服务器正在本地机器上运行，但 psql 无法连接
【发布时间】：2017-11-23 13:43:57
【问题描述】：

做完brew install postgres:

brew install postgres
brew link --overwrite postgresql

Postgres 已经在运行：

/~ $brew services start postgresql
Service `postgresql` already started, use `brew services restart postgresql` to restart.

那么我们如何使用psql 客户端进行连接呢？

13:47:28/~ $psql
psql: could not connect to server: No such file or directory
    Is the server running locally and accepting
    connections on Unix domain socket "/tmp/.s.PGSQL.5432"?

更新尝试了各种建议。

尝试重新启动..

 $brew services start postgresql
Service `postgresql` already started, use `brew services restart postgresql` to restart.
14:37:19/fastparquet $brew services restart postgresql
Stopping `postgresql`... (might take a while)
==> Successfully stopped `postgresql` (label: homebrew.mxcl.postgresql)
==> Successfully started `postgresql` (label: homebrew.mxcl.postgresql)

14:37:39/fastparquet $psql
psql: could not connect to server: No such file or directory
    Is the server running locally and accepting
    connections on Unix domain socket "/tmp/.s.PGSQL.5432"?
14:37:55/fastparquet $

连接到本地主机？

14:37:34/fastparquet $psql -h localhost
psql: could not connect to server: Connection refused
    Is the server running on host "localhost" (::1) and accepting
    TCP/IP connections on port 5432?
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 5432?

【问题讨论】：

psql -h localhost 工作吗？
另请参阅：stackoverflow.com/q/27700596/330315 或 stackoverflow.com/a/17411832/330315，如果您确实确定 Postgres 确实在运行
Postgres 显然没有运行
@a_horse_with_no_name 。看起来那是当场的。请回答：您可以在 OP 中使用我的 update 了解更多详情
您可以回答自己的问题（并接受该答案）。它没有任何问题。

标签： postgresql

【解决方案1】：

a_horse_with_no_name 的链接起到了作用。具体来说：

initdb -D /usr/local/var/postgres/

（来自Homebrew postgres broken）

然后

 createdb

（后者来自psql: FATAL: database "<user>" does not exist）

【讨论】：