===============================================================

AWS Zoom Link : https://us06web.zoom.us/j/84437549152?pwd=raSPtvAEQfZktoLmszHYmZqeHxyNrp.1

=================================================================

Prequesite : AWS Cloud Free Tier Account

Reference Video : https://www.youtube.com/watch?v=xi-JDeceLeI

=================================================================

1) Linux OS

2) Linux Commands

3) What is IT Infrastructure

4) On-Prem Infrastructure

5) Cloud Computing

6) Advantages with Cloud 

7) AWS Cloud 

8) AWS Services Overview

9) EC2 (Elastic Compute Cloud)

		- EBS
		- Load Balancing
		- Auto Scaling

10) S3 (Simple Storage Services)

11) RDS (Relational Databases)

12) IAM (User Management)

13) Bean Stack (Web application execution)

14) AWS Lambdas (Serverless Computing)

15) Billing Overview


==========================
What is Operating System
==========================

=> OS is a Mediator between user and computer

=> Wihtout OS we can't use any computer

=> Using OS we can run applications in computer.

Ex : Windows, Linux, Unix, Mac, Android, IOS etc......

=============
Windows OS
=============

-> It is developed by Microsoft

-> It is GUI based OS (Graphical User interface)

-> It is commercial OS (we need to purchase)

-> Windows is single user based OS

-> Security Features are less (anti-virus is requied)

-> Windows is recommended for personal use

	Ex: browsing, watch movies, play games, online classes.....

-> Windows not recommened to setup Infrastructure

   Ex : Database, web server, app server, backup , storage etc...


===========
Linux OS
==========

-> It is community based OS

-> Linux is free & open source

-> Linux is Multi User based OS

-> Security features are very good in linux

	(Anti-virus not required)

-> Linux is CLI based OS (Command Line Interface)

-> It is highly recommended to run servers

  Ex : database, web server, docker, jenkins, k8s, sonar, nexus

===============
Linux History  
===============

-> Linux OS developed by 'Linus Torvalds'

		Unix OS

		Minux

		(Li) nus Torvals + Mi(nux) = Linux


-> Linus Torvalds released linux os into market with source code...

-> Many s/w companies downloaded linux source code and modified according to their requirement and released into market with their brand names those are called as 'Linux Distributions'

				- Amazon Linux
				- Ubuntu
				- Red Hat (community & enterprise)
				- Fedora
				- CentOS
				- SUSE
				- Kali
				- Debian ..... 200+

==================
Environment setup
==================

1) Create Account in AWS 

2) Create Linux Virtual Machine using AWS EC2

3) Connect with Linux Virtual machine using MobaXterm/Putty				


@@@ Linux VM Setup : https://www.youtube.com/watch?v=uI2iDk8iTps


================
Linux CommandS
================

whoami : To display logged in username

date : display current date

cal : display calendar with current month

pwd : display present working directory

ls : list files and directories of pwd

				$ ls
				$ ls -l
				$ ls -lr
				$ ls -lt
				$ ls -ltr

cd : change directory

			$ cd <dirname>

			$ cd ..

mkdir : To create directory

		$ mkdir java

rmdir : To delete empty directory

touch : To create empty files

			$ touch f1.txt

			$ touch f2.txt f3.txt f4.txt		

cat : To create files + append data + display data

			$ cat > java.txt

			$ cat >> java.txt

			$ cat java.txt	

			$ cat -n java.txt

cp : To copy file data

			$ cp <src-file> <target-file>

mv : To rename files/directories + To move files/directories

			$ mv f1.txt f11.txt

			$ mv f1.txt mydata			

rm : To remove files and non-empty directories	

			$ rm <file-name>

			$ rm -r <dir-name>

head : Print top 10 lines of file data

			$ head a1.txt
			$ head -n 15 a1.txt

tail : Print last 10 lines of file data

			$ tail a1.txt
			$ tail -n 30 a1.txt

grep : Print file data based on pattern match

			$ grep "AWS" a1.txt

			$ grep -i "aws" a1.txt

Note: To see exception messages in log file we will use 'grep' command.

			$ grep -i "exception"	app.log

vi : Visual Editor (text editor)

			$ vi <file-name>

			command mode : only read + delete

			insert mode : press 'i' (modifications allowed)

			esc mode : press 'esc'

					:wq => write and quit

					:q! => close without saving

==============================================================

ifconfig : To get ip address

ping : To check connectivity

wget : To download files using url

curl : To send HTTP request


==========================
Package Managers in Linux
==========================

=> Package managers are used to install softwares in Linux machine

		amazon linux / red hat : yum

		ubuntu / debian : apt

# install git client
$ sudo yum install git
$ git --version

# install maven
$ sudo yum install maven
$ mvn --version
$ java --version


======================================================
How to deploy Spring Boot application in Linux VM
=======================================================

1) Clone Git Repo

		$ git clone https://github.com/ashokitschool/sb_log_app.git

2) Build app using maven

		$ cd sb_log_app
		$ mvn clean package

3) Run the jar file

		$ java -jar target/sb-log-app.jar

4) Enable Embedded Server port num in security group inbound rule

5) Access application in browser.

			URL : http://public-ip:port/welcome

=========================================================================