I used to be a happy s3cmd user. However recently when I try to transfer a large zip file (~7Gig) to Amazon S3, I am getting this error:
$> s3cmd put thef
Search for .s3cfg file, generally in your Home Folder.
.s3cfg
If you have it, you got the villain. Changing the following two parameters should help you.
socket_timeout = 1000 multipart_chunk_size_mb = 15