Ubuntu 18.04 Commands for Setting Up MongoDB

mongodb-quicksetup-ubuntu.md

MongoDB Set Up on Linode (Ubuntu 18.04)

1. $ sudo apt-key adv --keyserver hkp://keyserver.ubuntu.com:80 --recv 68818C72E52529D4 # Get Key
2. $ sudo echo "deb http://repo.mongodb.org/apt/ubuntu bionic/mongodb-org/4.0 multiverse" | sudo tee /etc/apt/sources.list.d/mongodb-org-4.0.list # Create needed files
3. $ sudo apt-get update # Reload packages
4. $ sudo apt-get install -y mongodb-org # install MongoDB
5. $ sudo mkdir -p /data/db # Create the db files
6. $ sudo chown -R `id -un` /data/db # Give appropriate permissions to directories
7. $ sudo systemctl start mongod # Start mongod process
8. $ sudo systemctl enable mongod # Enable the process
9. $ sudo netstat -plntu # Have mongod start on boot
10. $ sudo systemctl stop mongod # Stop process
11. $ mongod --port 27017 # Start process to ensure it's running on port 27017
12. Open a new tab, ssh into remote server to access mongo shell --> $ mongo --port 27017
13. (Now in the mongo shell) > use admin these commands come from authentication documentation # Access admin database
14. > db.createUser({ user: "username", pwd: passwordPrompt(), roles: [{ role: "userAdminAnyDatabase", db: "admin" }, "readWriteAnyDatabase" ]}) # Create superuser for all databases
15. >db.adminCommand( { shutdown: 1 } ) # Stop mongod to change config
16. >exit # Leave mongo shell 17.$ sudo nano /etc/mongod.conf # Open config file to enable auth
17. Uncomment the security config, and type authorization: enabled on line below. Match format to other config options.
18. Save (Ctl+X), Accept (y) and exit (Enter)
19. $ mongod --auth --port 27017 # Start mongod process with auth enabled (this would be in done in the tab that mongod was logging to in previous steps)
20. $ mongo --port 27017 --authenticationDatabase "admin" -u "myUserAdmin" -p # Access database as authenticated user
21. >use [new database name] # create a new database
22. > db.createUser({ user: "username", pwd: passwordPrompt(), roles: [{ role: "readWrite", db:"dbName"}]}) # This is just an example from the documentation showing how one could create a user, for a new database, that didn't have as many permisssions as previous admin user.

The database needs a document (I believe) in order to be saved, so make sure a holder document is inserted until connection with the app can be confirmed. (>db.[collection name].insert({}))