In the recent days, since the overwork made me exhaused, on arrival to home I will go to bed, which leads to loss of blogs that should have been written in the past days.

Now  I make a summay to all the commond of operating mongoDB.

First, you should run the mongoDB server. if the following picture exists, it means you has run the mongoDB successfully.

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Secondly,after run the mongodb server, next should execute the mongodb client.

thirdly, we input the db.help command, we will find all the method to operate database/

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In the above picture, it;s generally used in the development.

Notes, in the mongodb, there is no command like mysql ('create database xxx'), instead use command 'use dbname' to create a new db;

Lastly I set a simple exampe to show usage of some command.