enable mongodb in ubuntu code example

Example 1: how to start mongodb server in ubuntu

sudo systemctl start mongodb
# it will starts mongodb server

Example 2: how to install mongodb in ubuntu

wget -qO - https://www.mongodb.org/static/pgp/server-4.4.asc | sudo apt-key add -

Example 3: how to install mongodb server in ubuntu

sudo apt install -y mongodb
# it will install mongodb server into linux system