安装mysql5.6

# 安装包
yum localinstall  http://dev.mysql.com/get/mysql-community-release-el7-5.noarch.rpm

# 查看安装包
yum repolist enabled | grep "mysql.*-community.*"
mysql-connectors-community/x86_64 MySQL Connectors Community                  17
mysql-tools-community/x86_64      MySQL Tools Community                       31
mysql56-community/x86_64          MySQL 5.6 Community Server                 199

# 安装mysql
yum install mysql-community-server  -y

# 设置开机启动
systemctl enable mysqld

# 启动
systemctl start mysqld

# 重置密码
mysql_secure_installation