为什么Mongodb不能连接？(Why cannot Mongodb connect?)

 我正在尝试在Mac OSx上连接MongoDB，并使用自制软件安装。 在一个终端窗口中，我使用mongod命令设置数据库，并在回复结束时按预期显示 
 
waiting for connections on port 27017
 
 然后，我打开另一个终端窗口，输入mongo进入mongo shell。 
 
 但是，第一个终端窗口似乎不承认我的连接。 我怀疑这可能是因为关机不好。 这个答案有一些信息： 
 为什么我的mongodb不能连接到端口28017？ 但它并没有帮助我改变端口号。 
 
 首先，我该如何进行干净关机？ 文档中的教程说使用Control+C ，这是我以前关闭的。 其次，如何更改mongo连接到mongodb服务器的端口号？ 
 
 谢谢。 

I'm trying to connect MongoDB on my Mac OSx, and I installed using homebrew. In one terminal window, I set up the database with mongod command, and at the end of the reply, it says, as expect 
 
waiting for connections on port 27017
 
Then, I open up another terminal window, and type mongo to get to the mongo shell. 
 
However, the first terminal window does NOT acknowledge my connection it seems like. I suspect it could be from a bad shutdown. This answer has some info:
 Why won't my mongodb connect to port 28017? But it doesn't help me to change the port number. 
 
Firstly, how do I do a clean shutdown? The tutorial here from the documentation says to use Control+C, which is what I used to shutdown. Secondly, how do I change the port number that mongo connects to mongodb server?
 
Thanks.

原文：https://stackoverflow.com/questions/31150892