MySQL ERROR 1698 (28000) 错误

比眉伴天荒 2022-03-08 02:56 148阅读 0赞

之前MySQL服务端本机上使用密码登陆root账号是没有问题的，但是今天不知道是因为动了哪里，登陆失败并有这个错误代码：

~$ mysql -u root -p
    Enter password: 
    ERROR 1698 (28000): Access denied for user 'root'@'localhost'

解决步骤：

停止mysql服务

~$ sudo service mysql stop

以安全模式启动MySQL

~$ sudo mysqld_safe --skip-grant-tables &

MySQL启动之后就可以不用密码登陆了

~$ mysql -u root
    Welcome to the MySQL monitor.  Commands end with ; or \g.
    Your MySQL connection id is 2
    Server version: 5.7.10 MySQL Community Server (GPL)

查看一下user表，错误的起因就是在这里， root的plugin被修改成了auth\_socket，用密码登陆的plugin应该是mysql\_native\_password。

![复制代码][copycode.gif]

![复制代码][copycode.gif]

关于auth\_socket，在官方有说明： [https://dev.mysql.com/doc/mysql-security-excerpt/5.5/en/socket-authentication-plugin.html][https_dev.mysql.com_doc_mysql-security-excerpt_5.5_en_socket-authentication-plugin.html] ，反正现在暂时不用它， 那就把这里改了。

![复制代码][copycode.gif]

mysql> update mysql.user set authentication_string=PASSWORD('newPwd'), plugin='mysql_native_password' where user='root';
    Query OK, 1 row affected, 1 warning (0.00 sec)
    Rows matched: 1  Changed: 1  Warnings: 1
    
    mysql> flush privileges;
    Query OK, 0 rows affected (0.00 sec)

![复制代码][copycode.gif]

重启服务，问题就解决了

![复制代码][copycode.gif]

~$ sudo service mysql stop
    ...
     * MySQL Community Server 5.7.10 is stopped
    ~$ sudo service mysql start
    ..
     * MySQL Community Server 5.7.10 is started
    ~$ mysql -u root -p
    Enter password: 
    Welcome to the MySQL monitor.  Commands end with ; or \g.
    Your MySQL connection id is 2
    Server version: 5.7.10 MySQL Community Server (GPL)

![复制代码][copycode.gif]

[copycode.gif]: /images/20220308/389e3a519f0643aebe526d8d5cb4cae1.png
[https_dev.mysql.com_doc_mysql-security-excerpt_5.5_en_socket-authentication-plugin.html]: https://dev.mysql.com/doc/mysql-security-excerpt/5.5/en/socket-authentication-plugin.html