1.下载mysql源安装包

wget http://dev.mysql.com/get/mysql57-community-release-el7-8.noarch.rpm

2.安装mysql源

yum localinstall mysql57-community-release-el7-8.noarch.rpm

3.安装mysql

yum install mysql-community-server

4.设置开机启动

systemctl enable mysqld
systemctl daemon-reload

5.修改root本地登录密码

图片中红色框框中就是mysql随机生成的密码，复制到Enter password处即可登录

service mysqld start    //启动mysql服务
grep 'temporary password' /var/log/mysqld.log

![图片描述][1]
登录后修改mysql本地root密码

mysql> ALTER USER 'root'@'localhost' IDENTIFIED BY 'MyNewPassword1!'; 
或者
mysql> set password for 'root'@'localhost'=password('MyNewPassword1!'); 

注意：mysql5.7默认安装了密码安全检查插件（validate_password），默认密码检查策略要求密码必须包含：大小写字母、数字和特殊符号，并且长度不能少于8位。否则会提示ERROR 1819 (HY000): Your password does not satisfy the current policy requirements错误

6.添加远程登录用户

为了账户安全起见建议新建账户用于远程登录，root权限过高（本地登录）

mysql> GRANT ALL PRIVILEGES ON *.* TO 'xinyonghu'@'%' IDENTIFIED BY 'XinYongHu123!' WITH GRANT OPTION;

7.配置默认编码为utf8

修改/etc/my.cnf配置文件，在[mysqld]下添加编码配置

[mysqld]
character_set_server=utf8
init_connect='SET NAMES utf8'