CentOS7使用yum安装MySQL8

1. wget http://dev.mysql.com/get/mysql80-community-release-el7-2.noarch.rpm
2. sudo yum localinstall mysql80-community-release-el7-2.noarch.rpm
3. yum安装MySQL：sudo yum install mysql-community-server
4. 启动MySQL服务：systemctl start mysqld
5. 检查MySQL服务状态：systemctl status mysqld
6. 修改无密码登录：vim /etc/my.cnf 加入skip-grant-tables
7. 重启MySQL服务
8. 查看当前安全变量值：SHOW VARIABLES LIKE ‘validate_password%’;
9. 本地MySQL客户端登录：mysql
10. flush privileges
11. 修改密码： ALTER USER ‘root’@‘localhost’ IDENTIFIED BY ‘123456’;
12. 其它:
    ±-------------------------------------±-------+
    | Variable_name | Value |
    ±-------------------------------------±-------+
    | validate_password.check_user_name | ON |
    | validate_password.dictionary_file | |
    | validate_password.length | 6 |
    | validate_password.mixed_case_count | 1 |
    | validate_password.number_count | 1 |
    | validate_password.policy | LOW |
    | validate_password.special_char_count | 1 |
    | validate_password_check_user_name | ON |
    | validate_password_dictionary_file | |
    | validate_password_length | 8 |
    | validate_password_mixed_case_count | 1 |
    | validate_password_number_count | 1 |
    | validate_password_policy | MEDIUM |
    | validate_password_special_char_count | 1 |
    ±-------------------------------------±-------+
    可在/etc/my.cnf中添加上面的配置，如下图：
    

远程连接问题: authentication plugin caching_sha2_password
修改密码：ALTER USER ‘root’@’%’ IDENTIFIED WITH mysql_native_password BY ‘123456’;