gistfile1.txt

#!/usr/bin/ruby

require 'aws-sdk'

ec2 = Aws::EC2::Client.new(
region: 'eu-central-1'
)

resource = Aws::EC2::Resource.new(client: ec2)

allInstances = Array.new

resource.instances(filters: [{'instance-state-name',['stopped']}]).each do |instance|
        puts instance.instance_id
end