Install S3CMD
First you need to Install EPEL repo for CentOS 6
After EPEL-testing repo is installed and enabled, install s3cmd via yum
yum install s3cmd
After it is installed, you will need to configure it for our S3 bucket
s3cmd --configure
Insert your API, Secret, and encryption password
Follow all wizard defaults, and test during the wizard.
Tags: s3, s3cmd