Jenkins Introduction

Jenkins is an automation server that runs builds, tests, and deployments on demand or on schedule.

Install Jenkins

Download Jenkins from https://www.jenkins.io or use a Docker image:

docker run --name jenkins -p 8080:8080 -p 50000:50000 jenkins/jenkins:lts

Open http://localhost:8080 and complete the setup wizard.

Create your first job

In Jenkins, a job (or item) is a configured task. Start with a simple freestyle job:

• Give the job a name
• Add a source code repository or shell build step
• Save and run the job

Build a shell command

Use a shell step to run commands:

echo "Hello, Jenkins!"

Why Jenkins matters

Jenkins provides a centralized place for automation. It helps you standardize builds, run tests automatically, and deploy repeatedly with predictable behavior.