Please install the required packages before installing the s3cmd tool and download the source zip from github:

sudo yum install unzip python-pip
wget https://github.com/s3tools/s3cmd/archive/master.zip

Unzip the downloaded source zip file and move to the unzipped directory:

unzip master.zip
cd s3cmd-master/

Once you have moved to the unzipped directory then just run this command:

sudo python setup.py install

Install the dateutil module, which is powerful extensions to the datetime module that is available in the Python standard library:

sudo pip install python-dateutil

Check the installed version of s3cmd tool:

s3cmd --version

After installation, run the following command in order to configure the s3cmd tools using your AMAZON ACCESS KEY and SECRET KEY.

s3cmd --configure

Enjoy