Jenkins: Introduction & Getting Started

Jenkins is an open-source automation server widely used for building, testing, and deploying software through continuous integration and continuous delivery (CI/CD) pipelines.

Why Use Jenkins?

• Automate software builds, tests, and deployments
• Integrate with hundreds of plugins for SCM, notifications, and more
• Visualize and manage complex pipelines

How Jenkins Works

• Runs as a web application (Java-based)
• Pipelines are defined using a GUI or Jenkinsfile (Groovy syntax)
• Integrates with Git, Docker, cloud providers, and more

Quick Start Example

1. Install Jenkins (on Ubuntu):

   sudo apt update
   sudo apt install openjdk-11-jre
   wget -q -O - https://pkg.jenkins.io/debian/jenkins.io.key | sudo apt-key add -
   sudo sh -c 'echo deb https://pkg.jenkins.io/debian binary/ > /etc/apt/sources.list.d/jenkins.list'
   sudo apt update
   sudo apt install jenkins
   sudo systemctl start jenkins
   

2. Access Jenkins:
3. Open http://localhost:8080 in your browser
4. Follow the setup wizard
5. Create a simple pipeline:
6. Use the GUI or create a Jenkinsfile:

   pipeline {
     agent any
     stages {
       stage('Hello') {
         steps {
           echo 'Hello, Jenkins!'
         }
       }
     }
   }
   

Learn More

• Jenkins Documentation
• Getting Started Guide