MongodbHow-ToBeginner · 3 min read

How to Start MongoDB Server: Simple Steps to Run MongoDB

To start the MongoDB server, run the mongod command in your terminal or command prompt. This command launches the MongoDB server process, which listens for database connections on the default port 27017.

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Syntax

The basic command to start the MongoDB server is mongod. You can add options like --dbpath to specify the data directory or --port to change the listening port.

mongod: Starts the MongoDB server with default settings.
--dbpath <path>: Sets the folder where MongoDB stores data files.
--port <number>: Changes the port MongoDB listens on (default is 27017).

bash

mongod --dbpath /path/to/your/data --port 27017

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Example

This example shows how to start the MongoDB server using the default data directory and port. It assumes MongoDB is installed and the mongod command is available in your system's PATH.

bash

mongod

Output

2024-06-01T12:00:00.000+0000 I CONTROL [initandlisten] MongoDB starting : pid=12345 port=27017 dbpath=/data/db 64-bit host=myhost 2024-06-01T12:00:00.001+0000 I CONTROL [initandlisten] waiting for connections on port 27017

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Common Pitfalls

Common mistakes when starting MongoDB server include:

Not creating or specifying the dbpath directory, causing startup failure.
Trying to start mongod without proper permissions to access the data folder.
Port 27017 already in use by another process.
Not adding MongoDB's bin folder to your system PATH, so mongod command is not found.

Always ensure the data directory exists and you have permission to write to it.

bash

Wrong:
mongod --dbpath /nonexistent/path

Right:
mkdir -p /data/db
mongod --dbpath /data/db

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Quick Reference

Here is a quick cheat sheet for starting MongoDB server:

Command	Description
mongod	Start MongoDB server with default settings
mongod --dbpath /data/db	Start server with custom data directory
mongod --port 28017	Start server on port 28017
mongod --help	Show help and options

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Key Takeaways

Run mongod to start the MongoDB server process.

Specify --dbpath to set the data storage folder if not using default.

Ensure the data directory exists and you have write permissions.

Check that port 27017 is free or specify another port with --port.

Add MongoDB's bin folder to your system PATH for easy command access.