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

• 第一次啟動

  chkconfig mysqld on
  service mysqld start

• 設定 root 密碼

  /usr/bin/mysqladmin -u root password 'newpassword'
  mysql -u root -p

• https://www.zerostopbits.com/how-to-intall-mysql-5-6-on-centos-6-7/