Final answer:
To open AWS CLI from the AWS Management Console, use AWS CloudShell by clicking the CloudShell icon in the console to access a pre-authenticated command-line interface.
Step-by-step explanation:
To open AWS CLI from the AWS Management Console, you would need to use the AWS CloudShell rather than the CLI. The AWS CLI is a tool that you run on your local machine or EC2 instances to interact with AWS services. However, AWS CloudShell is a browser-based shell that you can launch directly from the AWS Management Console to run AWS CLI commands. To access it, you just need to log into your AWS Management Console, look for the CloudShell icon (resembling a command line prompt) usually at the top navigation bar, and click on it. This will open a new tab or pane at the bottom of the AWS Management Console window with a command-line interface pre-authenticated with your console's credentials, where you can start using AWS CLI commands right away.