get last modified object from S3 CLI

Question

I have a use case where I programmatically bring up an EC2 instance, copy and executable file from S3, run it and shut down the instance (done in user-data). I need to get o

Answer 1

After a while there is a small update how to do it a bit elegant:

aws s3api list-objects-v2 --bucket "my-awesome-bucket" --query 'sort_by(Contents, &LastModified)[-1].Key' --output=text

Instead of extra reverse function we can get last entry from the list via [-1]

Old answer:

This command just do the job without any external dependencies:

aws s3api list-objects-v2 --bucket "my-awesome-bucket" --query 'reverse(sort_by(Contents, &LastModified))[:1].Key' --output=text