Amazon Linux

https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/amazon-linux-ami-basics.html

The information of a image.

• cat /etc/image-id

Current Version

• cat /etc/system-release
• cat /etc/os-release

AWS CLI (Command Line Interface)

• aws --version

To list the available topics, use the following command

• amazon-linux-extras list

To find ec2 region 

• ec2-metadata --availability-zone | sed 's/.$//'

Installing Emacs

• sudo yum install emacs