【mongodb】mongodb碰到 Error: couldn't connect to server 127.0.0.1:27017, connection attempt failed : c...

  Error: couldn't connect to server 127.0.0.1:27017, connection attempt failed : [email protected]/mongo/shell/mongo.js:237:13   初次使用mac装的mongodb 碰到了 Error: couldn't connect to server 127.0.0.1:27017,

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