Script will list all running EC2 instances in the current AWS account

list-all-running-ec2s.sh

echo '"region","instance-id","instance-type","tags-name","tags-auto-owner"'
for region in $(aws ec2 describe-regions --query 'Regions[*].[RegionName]' --output text); do
  aws ec2 describe-instances \
    --region ${region} \
    --filters "Name=instance-state-name,Values=running" \
    --output json | \
      jq --arg region $region -r \
        '.Reservations[].Instances[] | [$region, .InstanceId, .InstanceType, (.Tags[] | select(.Key=="Name") | .Value), (.Tags[] | select(.Key=="auto:owner") | .Value)] | @csv'
done