centos下修改mysql默认端口

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