1. Log in to your AWS Management Console.
2. Go to the EC2 dashboard.
3. Under the Instances section, select the instance that has been running for a long time.
4. Stop the instance by right-clicking on it and selecting “Instance State” > “Stop”.
5. Once the instance is stopped, right-click on it again and select “Instance Settings” > “Change Shutdown Behavior”.
6. From the drop-down menu, select “Terminate”.
7. Click “Apply” and then “Save”.
8. Start a new instance with the same configuration as the terminated instance.
9. Once the new instance is running, ensure that all the data and configurations from the old instance are properly transferred to the new instance.
10. Finally, terminate the old instance to avoid any unnecessary charges.

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1. Open the AWS CLI on your local machine or EC2 instance.
2. List all the instances that are currently running using the following command:
   aws ec2 describe-instances --query 'Reservations[*].Instances[*].[InstanceId,InstanceType,State.Name,LaunchTime]' --output text
   
   This command will list all the instances that are currently running in your AWS account.
3. Identify the instances that have been running for a long time and need to be relaunched.
4. Stop the identified instances using the following command:
   aws ec2 stop-instances --instance-ids instance_id
   
   Replace instance_id with the ID of the instance that needs to be stopped. This command will stop the instance.
5. Once the instance is stopped, launch a new instance using the same configuration as the stopped instance.
   aws ec2 run-instances --image-id ami-xxxxxxxx --count 1 --instance-type t2.micro --key-name MyKeyPair --security-group-ids sg-xxxxxxxx --subnet-id subnet-xxxxxxxx
   
   Replace the image-id, instance-type, key-name, security-group-ids, and subnet-id with the same configuration as the stopped instance. This command will launch a new instance.
6. Once the new instance is launched, terminate the old instance using the following command:
   aws ec2 terminate-instances --instance-ids instance_id
   
   Replace instance_id with the ID of the stopped instance. This command will terminate the old instance.
7. Verify that the new instance is running and functioning properly.

1. Import the necessary AWS SDK modules in Python. For example, you can use the boto3 module.

import boto3

2. Create a session with AWS using the boto3.Session() method.

session = boto3.Session(
    aws_access_key_id='ACCESS_KEY',
    aws_secret_access_key='SECRET_KEY',
    region_name='REGION'
)

3. Use the boto3.client() method to connect to the EC2 service.

ec2 = session.client('ec2')

4. Use the describe_instances() method to get a list of all running instances.

instances = ec2.describe_instances(
    Filters=[
        {
            'Name': 'instance-state-name',
            'Values': ['running']
        }
    ]
)

5. Loop through the list of instances and use the terminate_instances() method to terminate them.

for instance in instances['Reservations'][0]['Instances']:
    instance_id = instance['InstanceId']
    ec2.terminate_instances(
        InstanceIds=[
            instance_id
        ]
    )

6. Alternatively, you can use the stop_instances() method to stop the instances instead of terminating them.

for instance in instances['Reservations'][0]['Instances']:
    instance_id = instance['InstanceId']
    ec2.stop_instances(
        InstanceIds=[
            instance_id
        ]
    )

7. You can also add additional filters to the describe_instances() method to target specific instances based on tags or other attributes.

instances = ec2.describe_instances(
    Filters=[
        {
            'Name': 'tag:Environment',
            'Values': ['Production']
        },
        {
            'Name': 'instance-state-name',
            'Values': ['running']
        }
    ]
)

8. Finally, you can schedule this Python script to run periodically using a task scheduler or cron job to ensure that long running instances are always re-launched.

1. In the EC2 console, note the instance configuration (AMI, instance type, security groups, IAM role, user data, tags).
2. Stop or terminate the long-running instance.
3. Launch a new instance with the same configuration (or re-terraform apply the same aws_instance definition so Terraform creates a fresh instance).