mysql 版本修改到5.6

卸载原来mysql，参考https://blog.csdn.net/huhuhuemail/article/details/77836518

yum install mysql-server mysql mysql-devel

rpm -Uvh http://repo.mysql.com/mysql-community-release-el6-5.noarch.rpm

安装MySQL，输入命令：
yum install mysql-community-server

service mysqld start