Jenkins Fundamentals

Summary

One of the oldest and most widely deployed CI/CD tools — highly customizable via plugins, self-hosted, and still common at larger, established companies despite newer cloud-native alternatives.

• 1Set up a local or free-tier Jenkins instance and create a simple build job.
• 2Learn the difference between a freestyle job and a Jenkinsfile-based pipeline.
• 3Understand why Jenkins' plugin ecosystem is both its biggest strength and a maintenance burden.