1. Login to AWS console and navigate to the EC2 dashboard.
2. Click on the “Key Pairs” option from the left-hand side menu.
3. Review the list of key pairs that are available. Identify the key pairs that are not being used by any instances.
4. Select the unused key pairs and click on “Actions” button.
5. From the drop-down menu, select “Delete Key Pair”.
6. A confirmation window will appear, click on “Delete” to confirm the deletion of the key pair.
7. Repeat this process for all unused key pairs.

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1. Open the AWS CLI on your local machine or EC2 instance.
2. Use the following command to list all the available key pairs:

aws ec2 describe-key-pairs

3. Identify the key pairs that are not in use and note down their key pair names.
4. Use the following command to delete the unused key pairs:

aws ec2 delete-key-pair --key-name <key-pair-name>

5. Replace <key-pair-name> with the actual name of the key pair you want to delete.
6. Repeat step 4 for all the unused key pairs.
7. Verify that the unused key pairs have been removed by running the command in step 2 again.

1. Import the necessary libraries:

import boto3

2. Create a boto3 EC2 client:

ec2 = boto3.client('ec2')

3. Retrieve all the key pairs in the AWS account:

key_pairs = ec2.describe_key_pairs()

4. Loop through the key pairs and check if they are associated with any running instances:

for key_pair in key_pairs['KeyPairs']:
    key_name = key_pair['KeyName']
    instances = ec2.describe_instances(Filters=[{'Name': 'key-name', 'Values': [key_name]}])
    if len(instances['Reservations']) == 0:
        print('Deleting key pair:', key_name)
        ec2.delete_key_pair(KeyName=key_name)

5. The above code will delete all the unused key pairs in the AWS account.