A./etc/my.cn B./etc/my.cnf C./etc/my.cnf.g D./var/my.cnf
A.rpm-ivh mysql*.rpm B.rpm-ivh mysql-server*.rpm C.rpm-ivh mysqld*.rpm D.rpm-ivh mysqld-server*.rpm
A.mysqladmin-uroot-p xxx B.mysqladmin-uroot--password xxx C.mysqladmin-urootpassword xxx D.mysql-uroot--password xxx