Verifying MongoDB Installation

Checking MongoDB Version

The first step to verify your MongoDB installation is to check the installed version of both the server and the client shell.

This confirms that MongoDB binaries are correctly installed and accessible from your command line.

• Open your terminal or command prompt.
• Run 'mongod --version' to check the MongoDB server version.
• Run 'mongo --version' to check the Mongo shell client version.

Starting the MongoDB Server

To verify the MongoDB server is running, you need to start the MongoDB daemon process.

The method to start the server depends on your operating system and installation method.

• On Linux, use 'sudo systemctl start mongod' or run 'mongod' directly.
• On Windows, start the MongoDB service via Services or run 'mongod' in a command prompt.
• On macOS, use 'brew services start mongodb-community' if installed via Homebrew.

Connecting with the Mongo Shell

Once the server is running, connect to it using the Mongo shell to confirm communication.

The shell allows you to interact with the database and verify that commands execute successfully.

• Open a new terminal window.
• Run the command 'mongo' to start the Mongo shell.
• If connected, you will see a prompt like '>' where you can enter MongoDB commands.
• Try running 'db.stats()' to get database statistics as a test.

Troubleshooting Common Issues

If you encounter errors during verification, consider these common troubleshooting steps.

• Ensure MongoDB binaries are in your system PATH.
• Check that no other process is using MongoDB's default port 27017.
• Review MongoDB log files for error messages.
• Verify your firewall settings allow MongoDB connections.