MongoDB

wget -qO - https://www.mongodb.org/static/pgp/server-6.0.asc | sudo apt-key add -
echo "deb [ arch=amd64 ] https://repo.mongodb.org/apt/ubuntu $(lsb_release -cs)/mongodb-org/6.0 multiverse" | sudo tee /etc/apt/sources.list.d/mongodb-org-6.0.list
sudo apt update && sudo apt install -y mongodb-org

sudo systemctl start mongod
sudo systemctl enable mongod
sudo systemctl status mongod

mongo               # Open MongoDB shell
show dbs            # List all databases
use mydatabase      # Switch to a database
show collections    # Show collections in the database
db.users.insertOne({name: "John", age: 30})  # Insert a document
db.users.find()     # Retrieve all documents from 'users' collection