Restore RHEL


 * 1) Enter the grub2 boot prompt and add rd.break - remove quiet and rhgb
 * 2) mount -o remount,rw /sysroot
 * 3) chroot /sysroot
 * 4) passwd root
 * 5) load_policy -i
 * 6) chcon -t shadow _t /etc/shadow or touch /.autorelabel