ubuntu mysql8重置密码方法

Mysql8密码忘记，解决办法

①sudo vim /etc/mysql/mysql.conf.d/mysqld.cnf

添加：

②重启服务

sudo /etc/init.d/mysql restart

③进入mysql

mysql -uroot -p

随意输入密码进入

下面你可能遇见这些错误：

采用这条语句update mysql.user set authentication_string=password('123456') where user='root';

 错误信息：

ERROR 1064 (42000): You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '('123456') where user='root'' at line 1

 换个方法：

 ALTER USER 'root'@'localhost' IDENTIFIED BY '123456';

出错：

ERROR 1290 (HY000): The MySQL server is running with the --skip-grant-tables option so it cannot execute this statement

查阅资料需要先进行：flush privileges;

接着你再使用语句：ALTER USER 'root'@'localhost' IDENTIFIED BY '123456';

出现密码太简单的错误：

ERROR 1819 (HY000): Your password does not satisfy the current policy requirements
mysql> set global validate_password.policy=0;
密码太简单错误解决方法：

mysql> set global validate_password.policy=0;
Query OK, 0 rows affected (0.00 sec)

mysql> set global validate_password.length=4;
Query OK, 0 rows affected (0.00 sec)

修改密码等级以及密码长度要求。

然后
ALTER USER 'root'@'localhost' IDENTIFIED BY '123456';

还在报错：

ERROR 1396 (HY000): Operation ALTER USER failed for 'root'@'localhost'

最后改用这条语句：

ALTER USER 'root'@'%' IDENTIFIED WITH mysql_native_password BY '123456'

再次进行：

flush privileges;

ctrl+d退出

最后注释掉这句话

重启服务，并进入mysql