Starting and stopping a MongoDB server

Starting and stopping a MongoDB server involves managing the mongodb process, which runs the MongoDB database server. Depending on the operating system, you can start, stop, and restart the MongoDB service through the command line or system service managers.

1. Starting MongoDB Server

Linux (Ubuntu/CentOS) Using `systemctl`

If MongoDB is installed as a service, you can manage it using the systemctl command.

Start MongoDB:
```
sudo systemctl start mongod
```
Enable MongoDB to Start on Boot: This ensures MongoDB starts automatically when the system boots.
```
sudo systemctl enable mongod
```
Check MongoDB Status: You can verify whether MongoDB is running.
```
sudo systemctl status mongod
```

Linux (Manual Method)

If MongoDB is not installed as a service, you can manually start it using the mongod command:

Start MongoDB with Default Configurations:
```
mongod
```
Start MongoDB with a Specific Configuration File:
```
mongod --config /etc/mongod.conf
```
Start MongoDB with a Specific Data Directory:
```
mongod --dbpath /path/to/data/db
```

The MongoDB server will run in the foreground by default unless you use the --fork option.

macOS Using `brew` (Homebrew)

If you installed MongoDB via Homebrew, you can manage it using the brew services command.

Start MongoDB:
```
brew services start mongodb-community
```
Stop MongoDB:
```
brew services stop mongodb-community
```

Restart MongoDB:

brew services restart mongodb-community

Windows Using the Command Prompt

If MongoDB is installed as a service on Windows, you can manage it via the Services console or sc command:

Start MongoDB from Command Prompt:
```
net start MongoDB
```
Stop MongoDB from Command Prompt:
```
net stop MongoDB
```

Alternatively, you can start MongoDB manually using the mongod command:

Start MongoDB Manually:

"C:\Program Files\MongoDB\Server\<version>\bin\mongod.exe" --config "C:\Program Files\MongoDB\Server\<version>\mongod.cfg"

2. Stopping MongoDB Server

Linux (Ubuntu/CentOS) Using `systemctl`

Stop MongoDB:
```
sudo systemctl stop mongod
```
Disable MongoDB from Starting on Boot: This prevents MongoDB from starting automatically on system boot.
```
sudo systemctl disable mongod
```

Linux (Manual Method)

If MongoDB is running manually, you can stop the server by finding and terminating the mongod process.

Find the MongoDB process ID (PID):
```
ps aux | grep mongod
```
Kill the process:
```
sudo kill <pid>
```

macOS Using `brew`

Stop MongoDB:
```
brew services stop mongodb-community
```

Windows Using the Command Prompt

If MongoDB is running as a Windows service, you can stop it with the following command:

Stop MongoDB:
```
net stop MongoDB
```

Alternatively, if MongoDB is running manually, you can stop it by closing the Command Prompt window or by using Ctrl+C if it was started in the foreground.

3. Restarting MongoDB Server

Linux (Ubuntu/CentOS) Using `systemctl`

Restart MongoDB:
```
sudo systemctl restart mongod
```

macOS Using `brew`

Restart MongoDB:

brew services restart mongodb-community

Windows

If MongoDB is running as a Windows service:

Restart MongoDB:
```
net stop MongoDB
net start MongoDB
```

4. Checking MongoDB Logs

To troubleshoot MongoDB issues, you may want to check the logs. The log files are typically located at:

Linux: /var/log/mongodb/mongod.log
Windows: Defined in the configuration file (typically C:\Program Files\MongoDB\Server\<version>\log\mongod.log).

Use the following command to view logs in Linux:

tail -f /var/log/mongodb/mongod.log

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MongoDB tutorial

What is MongoDB

Features of MongoDB

Use Cases and Applications of MongoDB

MongoDB vs SQL

Installing MongoDB on different operating systems

Configuring MongoDB