1. Introduction

1.1 Goal

In this tutorial, our primary goal is to learn how to start and stop the MongoDB service.

1.2 Learning outcomes

By the end of this tutorial, you will be able to:
- Start the MongoDB service
- Stop the MongoDB service

1.3 Prerequisites

To follow along with this tutorial, you should have:
- MongoDB installed on your machine
- Basic knowledge of command line interface

2. Step-by-Step Guide

Before you start interacting with your MongoDB database, you need to start the MongoDB service. Similarly, when you're done working with the database, you might want to stop the service.

2.1 Starting the MongoDB service

To start MongoDB, you will need to open your terminal and enter the following command:

sudo service mongod start

2.2 Stopping the MongoDB service

To stop MongoDB, you can use the following command in your terminal:

sudo service mongod stop

3. Code Examples

3.1 Starting MongoDB

# This command starts the MongoDB service
sudo service mongod start

After running this command, if everything goes well, MongoDB will start running and you should see an output similar to:

Starting mongod (via systemctl):                          [  OK  ]

3.2 Stopping MongoDB

# This command stops the MongoDB service
sudo service mongod stop

After running this command, MongoDB will stop running and you should see an output similar to:

Stopping mongod (via systemctl):                          [  OK  ]

4. Summary

In this tutorial, we learned how to start and stop the MongoDB service. These are fundamental operations that you need to perform when you want to start working with MongoDB and when you're done.

5. Practice Exercises

Now that you've learned how to start and stop the MongoDB service, try these exercises to reinforce your knowledge:

1. Start the MongoDB service, then verify it's running by connecting to it using the MongoDB shell.
2. Stop the MongoDB service, then try to connect to it using the MongoDB shell. What happens?
3. Restart the MongoDB service. (Hint: There's a restart command similar to the start and stop commands)

Solutions:

1. Start the service with sudo service mongod start, then connect with mongo. If the service started successfully, you should be able to run MongoDB shell commands.
2. Stop the service with sudo service mongod stop, then try to connect with mongo. You should see an error because the service is not running.
3. Restart the service with sudo service mongod restart. This command will stop the service if it's running, then start it again.

Remember, the key to learning is practice! Keep trying these commands until you're comfortable with them.