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      "body": "![](https://steemitimages.com/DQmeETuuAdcFb2m6wc4HwzD48qvKbxvP7NNeNucWzh4DPtq/image.png)\n\nThis tutorial guides you through the installation of MongoDB. MongoDB is an open-source document database (NoSQL) that provides high performance and is commonly used for scalable web applications.\n\nWe will assume that you already setup a user with superuser permission. If you haven’t, check out my other tutorial. Use this user going forward.\n\n## 1. Import the public key used by the package management system\n\nThe Ubuntu package management tools (i.e. `dpkg` and `apt`) ensure package consistency and authenticity by requiring that distributors sign packages with GPG keys.\n\nIssue the following command to import the [MongoDB public GPG Key](https://www.mongodb.org/static/pgp/server-3.6.asc):\n\n```\n$ sudo apt-key adv --keyserver hkp://keyserver.ubuntu.com:80 --recv 2930ADAE8CAF5059EE73BB4B58712A2291FA4AD5\n```\n\n## 2. Create a list file for MongoDB\n\nCreate the `/etc/apt/sources.list.d/mongodb-org-3.6.list` list file using the command appropriate for Ubuntu 17.10:\n\n```\n$ echo \"deb [ arch=amd64,arm64 ] https://repo.mongodb.org/apt/ubuntu xenial/mongodb-org/3.6 multiverse\" | sudo tee /etc/apt/sources.list.d/mongodb-org-3.6.list\n```\n\n## 3. Reload local package database and install MongoDB\n\nReload the local package database with this command:\n\n```\n$ sudo apt-get update\n```\n\nThen install MongoDB:\n\n```\n$ sudo apt-get install -y mongodb-org\n```\n\n## 4. Verify that MongoDB runs and starts at system reboot\n\nNext, start MongoDB with `systemctl`.\n\n```\n$ sudo systemctl start mongod\n```\n\nYou can also use `systemctl` to check that the service has started properly.\n\n```\n$ sudo systemctl status mongod\n```\n\nThe output is likely going to look something like this:\n\n```\n● mongod.service - High-performance, schema-free document-oriented database\n   Loaded: loaded (/lib/systemd/system/mongod.service; disabled; vendor preset: enabled)\n   Active: active (running) since Sat 2018-01-06 09:33:09 UTC; 1min 31s ago\n     Docs: https://docs.mongodb.org/manual\n Main PID: 16479 (mongod)\n    Tasks: 23\n   Memory: 68.8M\n      CPU: 393ms\n   CGroup: /system.slice/mongod.service\n           └─16479 /usr/bin/mongod --config /etc/mongod.conf\n```\n\nIf the previous status check command runs into any errors, check if `mongod.service` exists in the system’s services directory by using `ls /lib/systemd/system`\n\nThe last step of the installation process is to enable the automatic launch of MongoDB when the system starts.\n\n```\n$ sudo systemctl enable mongod\n```\n\nThe MongoDB server is now installed and running. You can manage the MongoDB service using the `systemctl` commands. For example `sudo systemctl mongod stop` to stop the service or `sudo systemctl mongod start` to start it again.\n\n## 5. Create a new MongoDB admin user\n\nIf you were to run the `mongo` command in the terminal, you will most likely notice a warning looking something like this:\n\n```\n2018–01–06T09:33:09.397+0000 I CONTROL [initandlisten] ** WARNING: Access control is not enabled for the database.\n2018–01–06T09:33:09.397+0000 I CONTROL [initandlisten] ** Read and write access to data and configuration is unrestricted.\n```\n\nWe will now create a new MongoDB admin user to rectify the situation. If not already done, connect to your MongoDB again using the `mongo` command and after the `>` sign, add these queries (replace the *user* and *pwd* values with your own):\n\n```\nuse admin\ndb.createUser({\n  user: \"matt\",\n  pwd: \"yourPassword\",\n  roles: [{ role: \"dbAdminAnyDatabase\", db: \"admin\" }]\n})\n```\n\nThis switches to the admin database and creates a new user with `dbAdminAnyDatabase` role therein. Find out more about this role in the [official MongoDB documentation](https://docs.mongodb.com/v3.0/reference/built-in-roles/#dbAdminAnyDatabase).\n\nOptionally, you may want to give the user [root permission](https://docs.mongodb.com/v3.0/reference/built-in-roles/#root). You can do so using the root role by replacing `dbAdminAnyDatabase` with `root` in the above query.\n\n## 6. Secure database access control on MongoDB\n\nTo remove the aforementioned warning message, we will now modify the MongoDB configuration slightly. Edit the *mongod.conf* with this command:\n\n```\n$ sudo nano /etc/mongod.conf\n```\n\nBelow the *#security* comment, add the following lines:\n\n```\nsecurity:\n  authorization: \"enabled\"\n```\n\nThen restart the MongoDB service:\n\n```\n$ sudo service mongod restart\n```\n\nNow your database is secured with username and password and the warning message should have disappeared upon your next connection to MongoDB. Try to connect to your database using the new user we created earlier. Replace with your login credentials, but leave the quotation marks intact:\n\n```\n$ mongo -u “matt” -p “yourPassword” --authenticationDatabase “admin”\n```\n\nCongratulations! You have now installed and secured your MongoDB service.",
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