db.users.save({ name: 'Joe' }); = save the document name into the users collection. Multiple entries can be entered with a single command with an array.
db.users.find(); = show everything in users.
db.users.find({ name: 'Mike' }); = find in users an user with name Mike.
db.users.update({ name: 'Mike' }, { name: 'Viktor' }); = update user Mike with Viktor.
db.users.remove(); = delete all entries in users.
Importing csv files
mongoimport --collection nameofcollection --type csv --headerline --db nameofdatabase file.csv = import a csv file as a collection in MongoDB. If csv file has no headers, omit --headerline.