# Install and configure MongoDB community edition


Perform these steps on the Amazon EC2 instance that you launched in [Launch an Amazon EC2 instance](chap-mongodb2documentdb.01.md).

1. Go to [Install MongoDB community edition on Amazon Linux](https://docs.mongodb.com/manual/tutorial/install-mongodb-on-amazon/) in the MongoDB documentation and follow the instructions there.

1. By default, the MongoDB server (`mongod`) only allows loopback connections from IP address 127.0.0.1 (localhost). To allow connections from elsewhere in your Amazon VPC, do the following:

   1. Edit the `/etc/mongod.conf` file and look for the following lines.

      ```
      # network interfaces
      net:
        port: 27017
        bindIp: 127.0.0.1  # Enter 0.0.0.0,:: to bind to all IPv4 and IPv6 addresses or, alternatively, use the net.bindIpAll setting.
      ```

   1. Modify the `bindIp` line so that it looks like the following.

      ```
        bindIp: public-dns-name
      ```

   1. Replace ` public-dns-name ` with the actual public DNS name for your instance, for example `ec2-11-22-33-44.us-west-2.compute.amazonaws.com`.

   1. Save the `/etc/mongod.conf` file, and then restart `mongod`.

      ```
      sudo service mongod restart
      ```

1. Populate your MongoDB instance with data by doing the following:

   1. Use the `wget` command to download a JSON file containing sample data.

      ```
      wget http://media.mongodb.org/zips.json
      ```

   1. Use the `mongoimport` command to import the data into a new database (`zips-db`).

      ```
      mongoimport --host public-dns-name:27017 --db zips-db --file zips.json
      ```

   1. After the import completes, use the `mongo` shell to connect to MongoDB and verify that the data was loaded successfully.

      ```
      mongo --host public-dns-name:27017
      ```

   1. Replace ` public-dns-name ` with the actual public DNS name for your instance.

   1. At the `mongo` shell prompt, enter the following commands.

      ```
      use zips-db
      
      db.zips.count()
      
      db.zips.aggregate( [
         { $group: { _id: { state: "$state", city: "$city" }, pop: { $sum: "$pop" } } },
         { $group: { _id: "$_id.state", avgCityPop: { $avg: "$pop" } } }
      ] )
      ```

      The output should display the following:
      + The name of the database (`zips-db`)
      + The number of documents in the `zips` collection (29353)
      + The average population for cities in each state

   1. Exit from the `mongo` shell and return to the command prompt by using the following command.

      ```
      exit
      ```