mysql8.x操作与mysql5.x有些许，综合记录一下。

windows、linux、macos基本类似：

1. 定位到目录(windows为例)

where mysqld(windows) which mysql(unix)

C:\Program Files\MySQL\MySQL Server 8.0\bin

2. 跳过验证

mysqld --console --skip-grant-tables --shared-memory

如果报错则先:
mysqld -remove MySQL
mysqld --initialize-insecure

3. 免密登录

mysql -u root

4. 修改密码

select authentication_string,host from mysql.user where user='root';
UPDATE mysql.user SET authentication_string='' WHERE user='root';
flush privileges;
exit

5. 重载服务

mysqld -install