How to enable and configure cross-region replication for S3 buckets using s3cmd?

To enable and configure cross-region replication for S3 buckets using s3cmd, follow these steps:

Install s3cmd on your local machine if you haven't already. You can find the installation instructions on the s3cmd website or refer to the installation documentation.
Configure s3cmd by running the command s3cmd --configure. This will prompt you to enter your AWS access key, secret key, and select the region for the primary bucket.
Create a new bucket in the destination region. You can use the AWS Management Console or execute the command s3cmd mb s3://destination-bucket --region=destination-region to create the bucket using s3cmd.
Enable versioning for both the primary and destination buckets. Versioning is required for cross-region replication. You can enable versioning using the AWS Management Console or execute the command s3cmd setversioning s3://primary-bucket --versioning-enabled and s3cmd setversioning s3://destination-bucket --versioning-enabled.
Configure the cross-region replication rules by creating a replication configuration file. You can create a new file using any text editor and save it as replication.xml. An example configuration could be:

<ReplicationConfiguration xmlns="http://s3.amazonaws.com/doc/2006-03-01/">
  <Role>arn:aws:iam::111111111111:role/ReplicationRole</Role>
  <Rule>
    <ID>example-rule</ID>
    <Destination>
      <Bucket>arn:aws:s3:::destination-bucket</Bucket>
      <StorageClass>STANDARD</StorageClass>
    </Destination>
    <Prefix></Prefix>
    <Status>Enabled</Status>
  </Rule>
</ReplicationConfiguration>

Make sure to replace 111111111111 with your AWS account ID and destination-bucket with the name of your destination bucket.

Configure the IAM role to allow cross-region replication. Replace ReplicationRole in the Role element of the XML configuration with the ARN of the IAM role that allows cross-region replication.
Enable cross-region replication using the command s3cmd setcors replication.xml s3://primary-bucket. This command will set the replication configuration for the primary bucket.
Test the cross-region replication by uploading a file to the primary bucket. You can use the command s3cmd put yourfile.txt s3://primary-bucket to upload a file.
Verify that the file gets automatically replicated to the destination bucket in the configured region.

By following these steps, you will be able to enable and configure cross-region replication for S3 buckets using s3cmd.