Get latest AWS EC2 Linux AMI

get_latest_ami.sh

#!/bin/bash

# Assumes AWS CLI installed and configured with default region.
# To query an alternate region add the --region parameter, e.g.
# --region us-west-2

aws ec2 describe-images \
  --owners amazon \
  --filters "Name=name,Values=amzn-ami-hvm*ebs" \
  --query 'sort_by(Images,&CreationDate)[-1].ImageId' \
  --output text