This script automates the installation and configuration of Jenkins on an Amazon Linux 2023 EC2 instance. Follow the steps below to complete the setup and access Jenkins.

• Ensure the EC2 instance has inbound security group rules for:
  • HTTP (port 80) for web access
  • Custom TCP (port 8080) for Jenkins UI access

1. Run the User Data Script
   Launch an EC2 instance with the provided user data script. The script will:

   • Install required dependencies
   • Download and start Jenkins

2. Retrieve the Initial Admin Password After the instance has started:

   • SSH into the EC2 instance:

     ssh -i <your-key.pem> ec2-user@<your-ec2-public-ip>

   • Check the Jenkins initial admin password:

     sudo cat /var/lib/jenkins/secrets/initialAdminPassword

   • Copy the displayed password for later use.

3. Access the Jenkins Web Interface

   • Open a web browser and navigate to:

     http://<your-ec2-public-ip>:8080
     

   • Enter the initial admin password from Step 2.

4. Complete the Jenkins Setup Wizard

   • Install recommended plugins or select specific ones based on your needs.
   • Create your admin user and finish the configuration.

• Make sure to replace <your-key.pem> and <your-ec2-public-ip> with your actual SSH key and EC2 instance IP address.
• For security, restrict access to the Jenkins server by configuring security group rules or enabling HTTPS.