1）安装依赖mysql
yum search libaio # 检索相关信息sql
yum install libaio # 安装依赖包bash
2）检查 MySQL 是否已安装server
yum list installed | grep mysqlrem
若是有，就先所有卸载，命令以下：get
yum -y remove mysql-libs.x86_64it
3)下载 MySQL Yum Repository(yum仓库)io
地址为 http://dev.mysql.com/get/mysql-community-release-el7-5.noarch.rpmclass
执行下载下载
wget http://dev.mysql.com/get/mysql-community-release-el7-5.noarch.rpm
若是提示-bash: wget: 未找到命令，请先执行 yum install wget 安装 wget
安装
4）若是没有wget下载对应的安装包
wget --->yum -y install wget
5）添加 MySQL Yum Repository
添加 MySQL Yum Repository 到你的系统 repository 列表中，执行
yum localinstall mysql-community-release-el7-5.noarch.rpm
6）验证下是否添加成功
yum repolist enabled | grep "mysql.*-community.*"
7）开始yum安装mysql
yum install mysql-community-server
8）开启
systemctl start mysqld
systemctl status mysqld 查看状态
9）验证 mysql
按照步骤来就能安装成功了