重置密码问题

```
mysql> use mysql
ERROR 1820 (HY000): You must reset your password using ALTER USER statement before executing this statement.
```

解决方法：mysql> alter user 'root'@'localhost' identified by 'youpassword';

安装navicat之后，结果在连mysql时，出现了如下错误提示：
`client does not support authentication protocol requested by server;consider upgrading MySQL client
`
解决方法 : mysql> alter user 'root'@'localhost' identified with mysql_native_password by 'youpassword';