錯誤 1698 (28000)：使用者「root」@「localhost」的存取被拒絕

Question

alhelal@VimLaTeX:~$ mysql -u root -p
Enter password: 
ERROR 1698 (28000): Access denied for user 'root'@'localhost'
alhelal@VimLaTeX:~$ sudo mysql -u root -p
[sudo] password for alhelal: 
Enter password: 
Welcome to the MariaDB monitor.  Commands end with ; or \g.
Your MariaDB connection id is 35
Server version: 10.1.29-MariaDB-6 Ubuntu 18.04

Copyright (c) 2000, 2017, Oracle, MariaDB Corporation Ab and others.

Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.

MariaDB [(none)]>   

為什麼mariadb不允許普通ubuntu使用者以mysql root使用者身分進入mysql？

我也嘗試過錯誤 1698 (28000)：在 Ubuntu 18.04 上使用者「root」@「localhost」的存取被拒絕但失敗了？

ERROR 1064 (42000): You have an error in your SQL syntax; check the manual that corresponds to your MariaDB server version for the right syntax to use near 'USER 'root'@'localhost' IDENTIFIED WITH mysql_native_password BY 'test'' at line 1

Answer 1

根據這個答案從 SO 來看，這可能是因為您的 root 使用者正在使用auth_socketUbuntu 上的 MySQL/MariaDB 預設使用的插件。

$ sudo mysql -u root

MariaDB [mysql]> USE mysql;
MariaDB [mysql]> SELECT User, Host, plugin FROM mysql.user;

+------------------+-----------------------+
| User             | plugin                |
+------------------+-----------------------+
| root             | auth_socket           |
+------------------+-----------------------+

將此更改為mysql_native_password將允許您連接而無需sudo：

$ sudo mysql -u root

MariaDB [mysql]> USE mysql;
MariaDB [mysql]> UPDATE user SET plugin='mysql_native_password' WHERE User='root';
MariaDB [mysql]> FLUSH PRIVILEGES;
MariaDB [mysql]> exit;

$ service mysql restart