Introduction and Setup of Jenkins

Setup: Installation, Configuration, Jenkins UI, Master Slave Architecture, Backup and Restore

Learning Outcome

Core Concepts (Slide 6)

Step 1: Start Your Virtual Machine

First, start your Virtual Machine with:

• Ubuntu or

• Linux Mint

Make sure the VM is running properly and you have terminal access.

Step 2: Install Java (Prerequisite for Jenkins)

Jenkins is a Java-based application, so Java must be installed before Jenkins.

Run the following command:

sudo apt install fontconfig openjdk-21-jre

Core Concepts (Slide 7)

After installation, verify Java:

This confirms that Java is installed and working correctly

Step 3: Prepare the System for Jenkins Installation

Before installing Jenkins, we need to:

• Add Jenkins official GPG key

• Add Jenkins package repository

This ensures Jenkins is installed from a trusted and official source.

java -version

Core Concepts (.....Slide N-3)

Step 4: Add Jenkins GPG Key

Run the following command:

This key verifies that Jenkins packages are authentic and not modified

Step 5: Add Jenkins Repository

Now add the Jenkins package source:

This step tells Linux where to download Jenkins from

sudo wget -O /etc/apt/keyrings/jenkins-keyring.asc \
https://pkg.jenkins.io/debian-stable/jenkins.io-2026.key

echo "deb [signed-by=/etc/apt/keyrings/jenkins-keyring.asc] \
https://pkg.jenkins.io/debian-stable binary/" | sudo tee \
/etc/apt/sources.list.d/jenkins.list > /dev/null

Core Concepts (.....Slide N-3)

Step 6: After adding the Jenkins repository, we now install Jenkins and make sure its service is running correctly on the system

• sudo apt update

Updates the system package list

• sudo systemctl status jenkins

Shows Jenkins service status

• sudo systemctl start jenkins

Starts the Jenkins service

• sudo systemctl enable jenkins

Enables Jenkins at system startup

• sudo apt install jenkins

Installs Jenkins on the system

sudo apt update
sudo apt install jenkins
sudo systemctl enable jenkins
sudo systemctl start jenkins
sudo systemctl status jenkins

Core Concepts (.....Slide N-3)

Step 7: Access Jenkins in Browser

Open the browser inside your virtual machine and visit:

http://YourIPAddress:8080/

This opens the Jenkins web interface

Step 8: Locate Initial Administrator Password

When Jenkins starts for the first time, it asks for an Administrator Password

The UI shows a file path:

/var/lib/jenkins/secrets/initialAdminPassword

Step 9: Retrieve Administrator Password

Run this command in the terminal:

cat /var/lib/jenkins/secrets/initialAdminPassword

This command displays the initial admin password

Step 10: Unlock Jenkins

• Copy the password from the terminal

• Paste it into the Jenkins UI

• Click Continue

Core Concepts (.....Slide N-3)

Step 11: Create Jenkins User

Set up:

• Username

• Password

• Email

This user will be used to log in to Jenkins

Step 12: Configure Jenkins URL

• For personal or learning use, keep the default URL

• In industry environments, DevOps/SRE teams usually customize this URL based on infrastructure needs

Click Save and Finish

Jenkins setup is now complete!

Jenkins UI

When we open Jenkins in a browser, the first screen we see is called the Jenkins Dashboard

The Jenkins dashboard is the main control panel of Jenkins

From here, we create jobs, run tasks and manage Jenkins settings

Jenkins UI

This dashboard is used to control & monitor everything that Jenkins does

Jenkins UI

This dashboard is used to control & monitor everything that Jenkins does

Jenkins UI

Summary

Which platform is mainly used for professional networking and B2B marketing ?

Which platform is mainly used for professional networking and B2B marketing ?