1.下载

wget http://dev.mysql.com/get/mysql-5.7.26-1.el7.x86_64.rpm-bundle.tar

2.解压

tar -xvf mysql-5.7.26-1.el7.x86_64.rpm-bundle.tar -C ../software/

3.删除mariadb

4.执行

yum install libaio

5.将文件移动

　　之前解压出现问题

6.依次执行

　　进入mysql目录下执行

rpm -ivh mysql-community-common-5.7.26-1.el7.x86_64.rpm
rpm -ivh mysql-community-libs-5.7.26-1.el7.x86_64.rpm
rpm -ivh mysql-community-client-5.7.26-1.el7.x86_64.rpm
rpm -ivh mysql-community-server-5.7.26-1.el7.x86_64.rpm

7.启动

systemctl start mysqld.service

8.查询随机密码

　　mysql 自动给 root 用户设置随机密码，运行命令可查看当前密码

grep "password" /var/log/mysqld.log

9.进入

mysql -u root -p

10.设置密码、

set password for 'root'@'localhost'=password('root');
flush privileges;

　　可以参考密码设置文档：https://blog.csdn.net/u013449046/article/details/106455041/

11.添加权限

　　目前navicat不能访问

use mysql;
SELECT Host, User FROM user;
UPDATE user SET Host = '%' WHERE User = 'root';
flush privileges;