You need an Access Key and Secret Key if you wnat to link your OS platform to S3 . So in my Linux machine , I installed the s3cmd tools to add my s3 bucket to set up a backup policy .
So to get these keys you need to create an IAM user on your AWS account :
Add a new user:
On policies choose ‘Attach exising policies directly’ and choosethe s3 full acess policy as below :
Click next and create the user , so after creating the user you will be able to see the required keys for the user :
So AWS gives you one opportunity to view and download the secret access key part of the access key. If you don’t download it or if you lose it, you can delete the access key and then create a new one from the IAM and ‘My security credentials’ .