Things on this page are fragmentary and immature notes/thoughts of the author. Please read with your own judgement!

1. The wheel group is the sudo group. So to grant a user the sudo previlege, just add it to the wheel group.

   gpasswd -a user_name wheel
   

EPEL

sudo yum -y install epel

IUS Release

sudo yum -y install https://centos7.iuscommunity.org/ius-release.rpm