MySql8.0.15修改root密碼
1、編輯 /etc/my.cnf
在[mysqld]下新增：
skip-grant-table
2、重啟Mysql
# systemctl restart mysqld
3、進入mysql操作
# mysql -u root
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 8
Server version: 8.0.15 MySQL Community Server - GPL
Copyright (c) 2000, 2019, Oracle and/or its affiliates. All rights reserved.
Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.
Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.
mysql> flush privileges;
Query OK, 0 rows affected (0.44 sec)
mysql> alter user 'root'@'localhost'IDENTIFIED BY 'newpassword';
Query OK, 0 rows affected (0.02 sec)
mysql>
4、刪除掉配置檔案裡的skip-grant-table
5、重啟
異常：
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 ''Aaa+123456'' at line 1
密碼必須包含大寫、小寫、數字和特殊字元。