In this lab, you acquire practical skills with Run Command, a capability of AWS Systems Manager, to manage a fleet of three Amazon Elastic Compute Cloud (Amazon EC2) instances.
Objectives
   •   Review the current infrastructure, which encompasses three EC2 instances and an Application Load Balancer.
   •   Test the DNS name of the Application Load Balancer to see the Apache HTTP Server response that’s passed from one of the three instances in the Application Load Balancer target group.
   •   Launch a Run Command feature from the Systems Manager console with the AWS-RunShellScript command document to uninstall Apache HTTP Server and install the nginx web server.
Prerequisites
   •   Familiarity navigating the AWS Management Console.
   •   Experience using and updating Bash scripts is helpful.
Outline
Task 1: Review the existing infrastructure
Task 2: Test the link for the DNS name of the Application Load Balancer and update the User Data by using Run Command
Challenge: Update one instance to use Apache HTTP Server
