问题
I have a current S3 bucket with existing files.
The bucket was originally a public bucket, I changed its permissions to be private, but I already have objects that were uploaded and have public read CannedACL permissions.
How do I change the permissions on all of the uploaded objects to private CannedACL?
回答1:
You can use the AWS Command-Line Interface (CLI) to change the permissions in-bulk.
You will use the aws s3 cp command. While this is a copy command, it can also be used to copy files in place, which simply changes their permissions.
For example:
aws s3 cp s3://my-bucket/ s3://my-bucket/ --recursive --acl bucket-owner-full-control
(bucket-owner-full-control: Both the object owner and the bucket owner get FULL_CONTROL over the object.)
See also: Amazon S3 File Permissions, Access Denied when copied from another account
回答2:
aws s3 cp s3://my-bucket/ s3://my-bucket/ --metadata x-amz-meta-updated=1 --recursive --acl private
来源：https://stackoverflow.com/questions/50269283/amazon-s3-changing-object-permissions-retroactively