In this article we will highlight what is a mean stack and how to install and setup mean stack in Centos/Redhat
Table of Contents
What is the MEAN stack?
MEAN stack is a bundle of JavaScript technologies that is more convenient for building dynamic JS websites. The best thing about MEAN stack is that all these technologies support the same language for both front-end and back-end. This increases efficiency and reduces the confusion that a lot of developers face while using different technologies that have different languages.
M in MERN stands for MongoDB. MongoDB is a simple NoSql and object-oriented database technology that is efficient and scalable for large data storage. MongoDB stores data as objects in JSON format, in separate documents instead of storing in rows and columns like in a typical relational database. This increases productivity in the manipulation and retrieval of data in abundance.
E in MERN stack stands for express JS. Express js or express is a node js framework that promotes the rapid development of node-based web and mobile applications. Express supports the MVC framework which helps in building more scalable, structured and dynamic websites. Express focuses more on the back-end or the developer side.
A in mean stack stands for Angular. Angular is an MVC framework for the client end or front end. Angular allows us to create a strong interactive web or mobile application. It also has great support for creating cross-platform and progressive web applications.
N in MERN stack stands for Node JS. Node JS allows out to write JavaScript on the server or outside of the browser. Node uses an event-driven, non-blocking I/O model that makes it lightweight and effectual, seamless for applications that run across distributed devices.
Step 1: update your centos/Redhat
yum -y update 
Step 2: installing MongoDB
Create a file to install mongoDB using the package manager. Go to /etc/yum.repos.d/mongodb-org-4.2.repo
And open the file through
sudo vi /etc/yum.repos.d/mongodb-org-4.2.repo once you are inside the file paste in the content to get mongoDB repository in your operating system
[mongodb-org-4.2]
name=MongoDB Repository
baseurl=https://repo.mongodb.org/yum/redhat/$releasever/mongodb-org/4.2/x86_64/
gpgcheck=1
enabled=1
gpgkey=https://www.mongodb.org/static/pgp/server-4.2.asc
save and exit.
Now you can simply run the following command to start the process of installation.
sudo yum install -y mongodb-org 
Press ‘y‘ for the rest of your installation.
Once the process is completed you can start and enable your mongoDB
systemctl start mongod.service
systemctl enable mongod.service 
you can check your newly installed mongoDB version by running
mongod --version 
Step 3: installing node JS
First make sure you have curl installed, if not simply type this command to install it.
sudo yum install curl 
now add source repository to your OS to add NodeJS repository.
curl -sL https://rpm.nodesource.com/setup_10.x | sudo bash - 
once the node JS repository is added, run the following command to install Node JS
sudo yum install nodejs 
You can check both node and npm version as in recent version npm is installed with node js
node –version
npm --version 
you can install node JS built-in tools to ease up with using of addons of npm and node js. It’s optional you can skip this but its recommended.
yum install gcc-c++ openssl-devel make 
Step 4: installing Express
Install express JS globally to access the express repository from your OS.
npm install -g express-generator 
Once you have express installed you can create a directory and navigate in it to create a project.
mkdir projectName
cd projectName
express
npm install 
step 5: installing Angular.
Once again take advantage of the simplicity npm provides and use it to run the following command to install angular cli.
npm install -g @angular/cli 
When you have your angular cli installed, you can use the ‘ng’ package to create a new angular application to try your new installation.
ng new hello-angular
cd hello-angular
ng serve
For more details on how to install Mean stack on different OS, click here.
