How to Install Jenkins on EC2 Instance:

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Install Jenkins on Ubuntu 18.0.4 | Setup Jenkins on AWS EC2 Ubuntu instance | How to setup Jenkins in Ubuntu EC2 instance?

Jenkins is an open source continuous integration/continuous delivery and deployment (CI/CD) automation software DevOps tool written in the Java programming language. It is used to implement CI/CD workflows, called pipelines.

Please follow the steps to install Java, Jenkins, Maven on Ubuntu 18.0.4 instance. Jenkins, Maven are Java based applications, so we need to install Java first. 

Change Host Name to Jenkins
sudo hostnamectl set-hostname Jenkins

Perform update first
sudo apt update

Install Java 11
sudo apt-get install default-jdk -y

 
Once install java, enter the below command

Verify Java Version
java -version

Maven Installation
Maven is a popular build tool used for building Java applications. Please click here to learn more about Maven. You can install Maven by executing below command:

sudo apt install maven -y

you can type mvn --version
you should see the below output.



Now lets start Jenkins installation

Jenkins Setup

Add Repository key to the system
Debian/Ubuntu
$ curl -fsSL https://pkg.jenkins.io/debian/jenkins.io-2023.key | sudo tee \
  /usr/share/keyrings/jenkins-keyring.asc > /dev/null
$ echo deb [signed-by=/usr/share/keyrings/jenkins-keyring.asc] \
  https://pkg.jenkins.io/debian binary/ | sudo tee \
  /etc/apt/sources.list.d/jenkins.list > /dev/nul
Update Ubuntu package
sudo apt update
Install Jenkins
sudo apt install jenkins -y


The above screenshot should confirm that Jenkins is successfully installed.

Access Jenkins in web browser

Now Go to AWS console. Click on EC2, click on running instances link. Select the checkbox of EC2 you are installing Java and Jenkins. Click on Action. Copy the value from step 4 that says --> Connect to your instance using its Public DNS:

Now go to browser. enter public dns name or public IP address with port no 8080.

Unlock Jenkins
You may get screen, enter the below command in Git bash( Ubuntu console)
Get the initial password from the below file
sudo cat /var/lib/jenkins/secrets/initialAdminPassword


Copy the password and paste in the browser.
Then click on install suggested plug-ins. 
Also create user name and password.
enter everything as admin. at least user name as admin password as admin
Click on Save and Finish. Click on start using Jenkins. Now you should see a screen like below:


That's it. You have setup Jenkins successfully 

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