xxxxxxxxxx
[ec2-user ~]$ sudo chgrp -R www /var/www
xxxxxxxxxx
[ec2-user ~]$ sudo chmod 2775 /var/www
[ec2-user ~]$ find /var/www -type d -exec sudo chmod 2775 {} +
xxxxxxxxxx
[ec2-user ~]$ sudo yum install -y httpd24 php56 php56-mysqlnd