AWS instance manager.

From the official documentation:

Before using the SDK, ensure that you've configured credentials. The best way to configure credentials on a development machine is to use the ~/.aws/credentials file, which might look like:

[default]
aws_access_key_id = AKID1234567890
aws_secret_access_key = MY-SECRET-KEY

Alternatively, you can set the following environment variables:

AWS_ACCESS_KEY_ID=AKID1234567890
AWS_SECRET_ACCESS_KEY=MY-SECRET-KEY

Set your AWS region by setting the environment variable AWS_REGION:

export AWS_REGION="us-west-2"

In order to send commands to your instances you need an SSH key, set the AWS_KEY_FILE with the absolute path of your key file:

export AWS_KEY_FILE="/home/user/.ssh/myawskeyfile.pem"