https://www.openmaru.io/convert2rhel-%ec%98%a4%ed%94%88%ec%86%8c%ec%8a%a4-centos-%eb%a6%ac%eb%88%85%ec%8a%a4%ec%97%90%ec%84%9c-%eb%a0%88%eb%93%9c%ed%96%87-%ec%97%94%ed%84%b0%ed%94%84%eb%9d%bc%ec%9d%b4%ec%a6%88-%eb%a6%ac/