Scheduled Events for EC2 Instances is a misconfiguration that occurs when there are scheduled events for EC2 instances that are not required or are outdated. These events can include instance retirement, system maintenance, and other events that can impact the availability of the instance.

To remediate this misconfiguration for AWS using AWS CLI, follow these steps:

1. Open the AWS CLI on your local machine or EC2 instance.

2. Run the following command to list all the scheduled events for your EC2 instances:

   aws ec2 describe-instance-status --include-all-instances --query 'InstanceStatuses[*].Events[*]'
   

3. Identify the scheduled events that are not required or are outdated.

4. To cancel a scheduled event, run the following command:

   aws ec2 cancel-scheduled-instance-termination --instance-id <instance-id> --dry-run
   

   Replace <instance-id> with the ID of the instance for which you want to cancel the scheduled event.

   Note: The --dry-run option will simulate the command but will not make any changes. Remove this option to execute the command.

5. To modify the scheduled event, run the following command:

   aws ec2 modify-instance-event-attribute --instance-id <instance-id> --instance-event-id <event-id> --not-before <new-time> --dry-run
   

   Replace <instance-id> with the ID of the instance for which you want to modify the scheduled event, <event-id> with the ID of the event, and <new-time> with the new time for the event.

   Note: The --dry-run option will simulate the command but will not make any changes. Remove this option to execute the command.

6. Repeat steps 4 and 5 for all the scheduled events that need to be remediated.

7. Verify that all the scheduled events have been remediated by running the command in step 2 again.

8. Close the AWS CLI.

By following these steps, you can remediate the Scheduled Events for EC2 Instances misconfiguration for AWS using AWS CLI.

The following are the step by step instructions to remediate the “Scheduled Events for EC2 Instances” misconfiguration for AWS using Python:

1. Import the necessary AWS SDK for Python (Boto3) modules:

import boto3
from botocore.exceptions import ClientError

2. Initialize the EC2 client:

ec2 = boto3.client('ec2')

3. Retrieve the list of EC2 instances using the describe_instances() method:

instances = ec2.describe_instances()

4. Loop through each instance and check if it has any scheduled events using the describe_instance_status() method:

for instance in instances['Reservations']:
    instance_id = instance['Instances'][0]['InstanceId']
    try:
        response = ec2.describe_instance_status(InstanceIds=[instance_id])
        if 'ScheduledEvents' in response['InstanceStatuses'][0]:
            # There are scheduled events for this instance
            print(f"Scheduled events found for instance {instance_id}")
            # Remediate the scheduled events by stopping the instance
            ec2.stop_instances(InstanceIds=[instance_id])
            print(f"Instance {instance_id} stopped successfully")
    except ClientError as e:
        print(f"Error retrieving instance status for {instance_id}: {e}")

5. If the instance has any scheduled events, stop the instance using the stop_instances() method.

6. Verify that the instance has been stopped successfully.

Note: This code will stop the instance to remediate the scheduled events. You can modify it to suit your specific requirements.