因為 Mantis 建議安裝 mysql 5.6 但 CentOS 6.9 內建 MySQL 只到 5.1 所以需另外安裝
rpm -Uvh http://repo.mysql.com/mysql-community-release-el6-5.noarch.rpm yum -y install mysql-server
chkconfig mysqld on service mysqld start
/usr/bin/mysqladmin -u root password 'newpassword' mysql -u root -p