mysql5.6安装：
wget http://repo.mysql.com/mysql-community-release-el7-5.noarch.rpm
rpm -ivh mysql-community-release-el7-5.noarch.rpm
yum -y install mysql mysql-server
默认mysql配置文件位于/etc/my.cnf
在my.cnf中添加 port=<yourport>
重启mysql服务搞定 systemctl restart mysqld