How to Install MongoDB

Freee4U

—

1. Check if MongoDB is Installed

To verify if MongoDB is installed on your server:

mongod --version

If MongoDB is installed, this command will return the installed version. If it’s not installed, you’ll see an error indicating that the command is not found.

You can also check if the MongoDB service is running:

sudo systemctl status mongod

If MongoDB is running, you will see “active (running)” in the output.

—

2. Install MongoDB (if not installed)

If MongoDB is not installed and you need it, follow these steps:

Install MongoDB on Debian-based systems (YunoHost is based on Debian):

Import the MongoDB repository key:

   wget -qO - https://www.mongodb.org/static/pgp/server-6.0.asc | sudo apt-key add -

Add the MongoDB repository:

   echo "deb [ arch=amd64,arm64 ] https://repo.mongodb.org/apt/debian $(lsb_release -cs)/mongodb-org/6.0 main" | sudo tee /etc/apt/sources.list.d/mongodb-org-6.0.list

Update and install MongoDB:

   sudo apt update
   sudo apt install -y mongodb-org

Start and enable MongoDB:

   sudo systemctl start mongod
   sudo systemctl enable mongod

—

3. Access MongoDB CLI

If MongoDB is installed, you can access the MongoDB shell using:

mongosh

If mongosh is unavailable, use the older mongo command (though it’s deprecated):

mongo

—

4. Set Up a Database via CLI

Once in the MongoDB shell (mongosh or mongo):

Create or switch to a database:

use mydatabase

This command switches to a database named mydatabase. If it doesn’t exist, it will be created when you add data.

Add a collection and insert data:

db.mycollection.insertOne({ name: "example", value: 42 })

This creates a collection called mycollection and inserts a document into it.

List all databases:

show dbs

List all collections in the current database:

show collections

—

5. Configure MongoDB for Security

Create an Admin User:
In the admin database, create a user with administrative privileges:

   use admin
   db.createUser({
       user: "admin",
       pwd: "yourpassword",
       roles: [ { role: "userAdminAnyDatabase", db: "admin" } ]
   })

Enable Authentication:
Edit the MongoDB configuration file:
```
   sudo nano /etc/mongod.conf
```
Look for the security section and enable authorization:
```
   security:
       authorization: enabled
```
Restart MongoDB:
```
   sudo systemctl restart mongod
```
Log in with Authentication:
When connecting to MongoDB, provide the admin user credentials:
```
   mongosh -u admin -p yourpassword --authenticationDatabase admin
```

—

Let me know if you need additional help configuring MongoDB for specific YunoHost apps or securing the setup!