A little utility for syncing down EC2 instances to your local SSH config.
$ ec2-ssh-config -h
Usage of ec2-ssh-config:
-aws_access_key="": aws access key, defaults to $AWS_ACCESS_KEY_ID
-aws_secret_key="": aws secret access key, defaults to $AWS_SECRET_ACCESS_KEY
-backup=true: create a backup file
-f="~/.ssh/config": path to ssh config file
-prefix="": prefix for host ($prefix$instance_name, ex. acl-mywebserver)
-region="": ec2 region, defaults to $AWS_EC2_REGION
-user="": ssh user to use
-version=false: print version and exit