1. First we need to import the mongodb public GPG key to verify the authenticity of distributor for ubuntu package manager

        sudo apt-key adv --keyserver hkp://keyserver.ubuntu.com:80 --recv 7F0CEB10

        #output would be something like

        gpg: requesting key 7F0CEB10 from hkp server keyserver.ubuntu.com
        gpg: key 7F0CEB10: public key "Richard Kreuter " imported
        gpg: Total number processed: 1
        gpg:               imported: 1  (RSA: 1)

    

2. Now we will create a list file for mongodb by using the following command.

        echo "deb http://repo.mongodb.org/apt/ubuntu trusty/mongodb-org/3.0 multiverse" | sudo tee /etc/apt/sources.list.d/mongodb-org-3.0.list

        #output

        deb http://repo.mongodb.org/apt/ubuntu trusty/mongodb-org/3.0 multiverse
    

3. In this step we will reload the local packages on ubuntu:

    sudo apt-get update

4. Once we reached here, we will hit the final command to install the mongodb

    sudo apt-get install -y mongodb-org

    #To install a specific version you can mention the version

    sudo apt-get install -y mongodb-org=3.0.7 mongodb-org-server=3.0.7 mongodb-org-shell=3.0.7 mongodb-org-mongos=3.0.7 mongodb-org-tools=3.0.7

5. Thus mongodb installation is complete. You can check it by simply writing mongo and hitting it. you will be connected to the mongo shell. You can also check the version by:

    mongo --version 

    #output
    MongoDB shell version: 3.0.7

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