Creating a Jenkins Job & Git Integration

What is a Job?

A Job in Jenkins is used to perform a set of tasks. Jenkins jobs are of two types:

• Freestyle — the older, GUI-driven style.
• Pipeline — the newer, script-based style.

Basic Steps to Create a Job

1. Click on "New Item" / Create a job.
2. Enter the task name.
3. Choose Freestyle project or Pipeline depending on your requirement.

Connecting a Git Repository

1. Copy the GitHub repo URL and paste it under Source Code Management → Git.
2. If Git isn't installed on the server yet, install it on the AWS terminal:

   yum install git -y

3. For a public repo, no credentials are needed. For a private repo, credentials must be created (covered in the parameters/credentials topic).
4. To build from a specific branch, mention the branch name under Branches to build. By default Jenkins uses */master.

Running the First Build

• Click Save and then Build Now.
• Check the output via Console Output (click the green tick mark in Build History).
• To see the repo files on the Linux server:

  cd /var/lib/jenkins/workspace/task_name

Important: If you edit code on GitHub, the change will not reflect on the Linux server until you run the build again — this is a fully manual step unless we set up automatic triggers.