MEAN STACK: Installation (Part 2)

MongoDB: MongoDB is an open-source document database that provides high performance, high availability, and automatic scaling. The installation of MongoDB Community Edition on ubuntu using .deb packages:

Import the public key used by the package management system using the command:

sudo apt-key adv –keyserver hkp://keyserver.ubuntu.com:80 –recv 9DA31620334BD75D9DCB49F368818C72E52529D4

Create a list file for Mongo DB using the command:

For Ubuntu 14.04 (Trusty):

echo “deb [ arch=amd64 ] https://repo.mongodb.org/apt/ubuntu trusty/mongodb-org/4.0 multiverse” | sudo tee /etc/apt/sources.list.d/mongodb-org-4.0.list

For Ubuntu 16.04 (Xenial):

echo “deb [ arch=amd64,arm64 ] https://repo.mongodb.org/apt/ubuntu xenial/mongodb-org/4.0 multiverse” | sudo tee /etc/apt/sources.list.d/mongodb-org-4.0.list

For Ubuntu 18.04 (Bionic):

echo “deb [ arch=amd64 ] https://repo.mongodb.org/apt/ubuntu bionic/mongodb-org/4.0 multiverse” | sudo tee /etc/apt/sources.list.d/mongodb-org-4.0.list

Reload local package database:

sudo apt-get update

For the latest version:

sudo apt-get install -y mongodb-org

For the specific version:

sudo apt-get install -y mongodb-org=4.0.4 mongodb-org-server=4.0.4 mongodb-org-shell=4.0.4 mongodb-org-mongos=4.0.4 mongodb-org-tools=4.0.4

Optional: Although you can specify any available version of MongoDB, apt-get will upgrade the packages when a newer version becomes available. To prevent unintended upgrades, you can pin the package at the currently installed version by following commands:

echo "mongodb-org hold" | sudo dpkg –set-selections

echo "mongodb-org-server hold" | sudo dpkg –set-selections

echo "mongodb-org-shell hold" | sudo dpkg –set-selections

echo "mongodb-org-mongos hold" | sudo dpkg –set-selections

echo "mongodb-org-tools hold" | sudo dpkg –set-selections

After installation, the commands to run the MongoDB are:

Start MongoDB

sudo service mongod start

Verify that the MongoDB process has started successfully by checking the contents of the log file at /var/log/mongodb/mongod.log for a line reading:

[initandlisten] waiting for connections on port 27017

Stop MongoDB

sudo service mongod stop

Restart MongoDB

sudo service mongod restart

Open Mongo shell

mongo

For any other query regarding installation, visit MongoDB Documentation

Node: Node.js is an open source cross-platform JavaScript run-time environment that allows server-side execution of JavaScript code which simply means that you can run JavaScript code on your machine as a standalone application, free of any web browser. Installation of the node on Ubuntu from Ubuntu repository:

Reload local package database:

sudo apt-get update

Install nodejs and npm using the apt package manager:

sudo apt install nodejs npm

Verify the installation by executing the following commands:

For nodejs :

nodejs –version

Output: v8.10.0

For npm:

npm –version

Output: 3.5.2

NPM (Node Package Manager) gives you the ability to download Node modules or packages to extend the functionality of your application.

For any other query regarding installation, visit Node JS Documentation.

Express: Expres is a web application framework for Node. In basic terms, an Express application is simply a Node application that happens to use Express as the framework. Express can be added in our project by using NPM (Node Package Manager):

npm install –save express

Angular: Angular is a platform that makes it easy to build applications with the web. Angular combines declarative templates, dependency injection, an end to end tooling, and integrated best practices to solve development challenges. Angular empowers developers to build applications that live on the web, mobile, or the desktop.

The setup of Angular is done by using Angular CLI (Command Line Interface). Angular CLI can be installed by using NPM (Node Package Manager):

sudo npm install -g @angular/cli

The angular project can be set up by using the following commands:

Create a new Angular project using

ng new <project_name>

Now change the directory to project folder

cd <project_name>

Now start the development server using

ng serve –open

Now, check in the browser that your application started running at default URL:

http://localhost:4200

You can also add angular material for better UI experience. To install angular material in your application use command:

npm install –save @angular/material

For any other query regarding installation, visit Angular Documentation.

Few Important Points

For better UI of Mongo DB download Studio 3T, a professional MongoDB GUI. It Queries faster with the most powerful MongoDB GUI and IDE. It is available for all Windows, macOS, and Linux. Download

Use Virtual Studio for development because that simply makes breaking with our code much easier. [Source]-https://blog.knoldus.com/mean-stack-installation-part-2/

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