How to Install Jenkins on Ubuntu (2025) | Complete Hands-On Guide

In this video, I’ll show you how to install Jenkins on Ubuntu from scratch using the official Jenkins repository. This is a complete practical demo where we install Java 17, configure Jenkins, open firewall ports, unlock the Jenkins dashboard, install plugins, and set up your admin user. Whether you're learning DevOps, preparing for interviews, or setting up CI/CD pipelines — this tutorial is beginner-friendly and 100% hands-on. ✅ What You'll Learn ✔ How to update Ubuntu and install Java (OpenJDK 17) ✔ Add Jenkins official repository & signing key ✔ Install and start Jenkins service ✔ Enable & verify Jenkins on port 8080 ✔ Get initial admin password ✔ Access Jenkins dashboard & install suggested plugins