Writing basic MongoDB queries

Before you can write MongoDB queries and inject some data, first you must connect to MongoDB, so open a terminal and type the following:

$ mongo

Then you can list the databases that you have in the MongoDB system:

> show dbs

You should get the following output:

admin 0.000GB
config 0.000GB

These two databases (admin and config) are the default ones from MongoDB. However, we should create new databases according to our needs and purposes.