mongo Command Examples

The legacy MongoDB shell. See mongosh for the new shell. Note: all connection options can be replaced with one string: mongodb://user@host:port/db_name?authSource=authdb_name. More information: https://docs.mongodb.com/manual/reference/program/mongo.

• Connect to a local database on the default port (mongodb://localhost:27017):

mongo

• Connect to a database:

mongo --host {{host}} --port {{port}} {{db_name}}

• Authenticate using the specified username on the specified database (you will be prompted for a password):

mongo --host {{host}} --port {{port}} --username {{username}} --authenticationDatabase {{authdb_name}} {{db_name}}

• Evaluate a JavaScript expression on a database:

mongo --eval '{{JSON.stringify(db.foo.findOne())}}' {{db_name}}