In addition to @Ramachandra_37567,
You need to be familiar with three things : -
Your Operating System prompt
This is your OS prompt where you run the vagrant related commands such as
vagrant up and
vagrant ssh to get inside your virtual machine.
This is your vagrant prompt and this is where you create the directories used in the labs, set permissions or run the validations scripts. This is where you also run the mongod, mongo or
MongoDB Enterprise >
This is your mongo shell and you run all the MongoDB related commands here.
Please feel free to get back to us if something is not clear or I have failed to mention something.
Hope it helps!
Curriculum Services Engineer