一、安装前准备
查看数据库版本命令： mysql --version
mysql-community-common-8.0.17-1.el7.x86_64.rpm
mysql-community-libs-8.0.17-1.el7.x86_64.rpm
mysql-community-client-8.0.17-1.el7.x86_64.rpm
mysql-community-server-8.0.17-1.el7.x86_64.rpm
二、安装RPM包
依次安装上述RPM包，前后安装包为依赖关系。
# rpm -ivh mysql-community-common-8.0.17-1.el7.x86_64.rpm
# rpm -ivh mysql-community-libs-8.0.17-1.el7.x86_64.rpm
# rpm -ivh mysql-community-client-8.0.17-1.el7.x86_64.rpm
# rpm -ivh mysql-community-server-8.0.17-1.el7.x86_64.rpm三、 查询root账户初始密码
mysql 8.0版本的初始密码默认非空，安装时自动生成，存储在/var/log/mysqld.logzhon中。
# grep 'temporary password' /var/log/mysqld.log
2019-09-25T06:52:32.788931Z 5 [Note] [MY-010454] [Server] A temporary password is generated for root@localhost:~~ aVcrv:9nEnsd~~四、修改root密码
修改密码默认有安全性要求，对密码复杂度有控制。
mysql> alter user 'root'@'localhost' identified by 'redhat';
ERROR 1819 (HY000): Your password does not satisfy the current policy requirements
mysql> alter user 'root'@'localhost' identified by '1qaz!QAZ';
Query OK, 0 rows affected (0.15 sec)
mysql> flush privileges;
Query OK, 0 rows affected (0.01 sec)五、查看当前用户配置信息
mysql> show databases;
mysql> use mysql;
mysql> select user,host,plugin from user;
六、新建一用户用于远程访问
mysql> create user 'wangwang'@'%' identified by '1qaz!QAZ';
Query OK, 0 rows affected (0.08 sec)
mysql> grant all on *.* to 'wangwang'@'%';
Query OK, 0 rows affected (0.12 sec)
mysql> select user,host,plugin from user;该账户的plugin加密方式为caching_sha2_password， MySQL 8.0前的客户端在连接 MySQL 8.0服务器时会出现 Authentication plugin 'caching_sha2_password' cannot be loaded 的错误（需要更该为mysql_native_password）。
扫描二维码关注公众号，回复：
7486069 查看本文章
七、修改加密方式
修改加密规则
mysql> alter user 'wangwang'@'%' identified by '1qaz!QAZ' password expire never;
Query OK, 0 rows affected (0.17 sec)更新用户密码
mysql> alter user 'wangwang'@'%' identified with mysql_native_password by '1qaz!QAZ';
Query OK, 0 rows affected (0.04 sec)保存更改
mysql> flush privileges;
Query OK, 0 rows affected (0.05 sec)查询信息
mysql> select user,host,plugin from user;
八、测试连接
可以使用Navicat进行测试。
