Mongodb解决不能连接到服务器的错误

1.今天连接MongoDB的时候，出现了以下错误: MongoDB shell version: v3.4.2 connecting to: test Mon Mar  3 23:45:09.491 Error: couldn't connect to server 127.0.0.1:27017 at src/mongo/shell/mongo.js:145 exception: connect

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