Enable epel and powertools repositories on Rocky Linux

• enable epel repository:
  For Rocky Linux 8:
  

  sudo dnf install https://dl.fedoraproject.org/pub/epel/epel-release-latest-8.noarch.rpm

  
  For Rocky Linux 9:
  

  sudo dnf install https://dl.fedoraproject.org/pub/epel/epel-release-latest-9.noarch.rpm

  
  For Rocky Linux 8/9:
  

  sudo dnf upgrade --refresh -y
  sudo dnf repolist | grep epel

• enable powertools repository:

  sudo dnf config-manager --set-enabled powertools
  sudo dnf repolist | grep powertools