1.輸入該命令按回車鍵:dnf update -y
2.輸入該命令按回車鍵:dnf install -y centos-release-stream
3.輸入該命令按回車鍵:rpm -q centos-release-stream
4.輸入該命令按回車鍵:dnf install -y centos-release-stream
5.輸入該命令按回車鍵:dnf swap -y centos-{linux,stream}-repos
6.輸入該命令按回車鍵:dnf update -y
7.輸入該命令按回車鍵查看版本:cat /etc/redhat-release