How To Allow WordPress Installed On Amazon To Upload Files From Admin Panel

I have successfully installed wordpress on Amazon Server.

I followed this link as a guideline for installation on Amazon.
http://docs.aws.amazon.com/AWSEC2/latest/UserGuide/hosting-wordpress.html

I followed the instructions under To fix file permissions for the Apache web server without any success. I was still unable to upload or update from admin panel.

Nevertheless I did a little of bit of more search and I tried installing vsftpd and creating an “ftpuser” account without success too.
http://stephen-white.blogspot.sg/2012/05/how-to-set-up-wordpress-on-amazon-ec2_31.html

Please assist