After Powering off an EC2 instance and restarting it,

1. SSH into the instance using the new ip address
2. show the list of last running containers docker ps -a
3. Restart Jenkins using sudo docker start jenkins

Login into the Jenkins UI using the user id and password previously created

Depending on your App/Programming Language, You need to have different build tools Installed and configured on Jenkins

There are 2 Ways to install and configure Build Tools on Jenkins

1. Through Jenkins Plugin (By installing the plugin of the tools that I need via UI)
2. Install Tools directly on server, inside the container (through the Command Line)

Maven Plugin Installation (UI)

Step 1: Go to Settings (Top right corner)

Step 2: Click on Tools

Step 3: Scroll down to Maven and Click on Add Maven

Step 4: Give it a name, select version and click on save