Uninstall a whole load of packages at once!

Using yum to uninstall all ruby packages that has the string rhscl in them:

$ yum list installed|grep ruby|grep rhscl|awk '{print $1}'| xargs yum -y remove 

Like-wise for ruby under foreman and scl:

$ yum list installed|grep ruby|grep foreman|awk '{print $1}'| xargs yum -y remove 
$ yum list installed|grep ruby|grep scl|awk '{print $1}'| xargs yum -y remove