MySQL CentOS：拒绝用户 ''@'localhost' 访问数据库

Question

我使用 sudo yum install mysql-server 在 CentOS 中安装了 MySQL 并使用 mysql -u root -p 登录到 MySQL 并输入了空白密码。它不允许我使用 MySQL 数据库或 select users/update password/create 数据库。

mysql> select user();
+----------------+
| user()         |
+----------------+
| root@localhost |
+----------------+
1 row in set (0.00 sec)

mysql> use mysql;
ERROR 1044 (42000): Access denied for user ''@'localhost' to database 'mysql'

mysql> UPDATE user SET Password=PASSWORD('*****') WHERE user='root';
ERROR 1046 (3D000): No database selected

mysql> show grants;
+--------------------------------------+
| Grants for @localhost                |
+--------------------------------------+
| GRANT USAGE ON *.* TO ''@'localhost' |
+--------------------------------------+
1 row in set (0.00 sec)


[centos@****~]$ sudo /sbin/service mysqld stop
Redirecting to /bin/systemctl stop  mysqld.service
[centos@****~]$ sudo mysqld_safe
151026 14:40:32 mysqld_safe Logging to '/var/log/mysqld.log'.
151026 14:40:32 mysqld_safe A mysqld process already exists
[centos@*****~]$ mysql -u root
Welcome to the MySQL monitor.  Commands end with ; or \g.
Your MySQL connection id is 152
Server version: 5.6.27 MySQL Community Server (GPL)

Copyright (c) 2000, 2015, 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> use mysql;
ERROR 1044 (42000): Access denied for user ''@'localhost' to database 'mysql'
mysql>

再次出错：

[centos@~]$ sudo /sbin/service mysqld stop
Redirecting to /bin/systemctl stop  mysqld.service
[centos~]$ sudo mysqld_safe --skip-grant-tables &
[1] 25678
[centos~]$ 151026 14:53:07 mysqld_safe Logging to '/var/log/mysqld.log'.
151026 14:53:07 mysqld_safe A mysqld process already exists

[1]+  Exit 1                  sudo mysqld_safe --skip-grant-tables
[centos@~]$ sudo mysql -u root
Welcome to the MySQL monitor.  Commands end with ; or \g.
Your MySQL connection id is 160
Server version: 5.6.27 MySQL Community Server (GPL)

Copyright (c) 2000, 2015, 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> use mysql;
ERROR 1044 (42000): Access denied for user ''@'localhost' to database 'mysql'

请告诉我如何解决这个问题。

Answer 1

sudo /etc/init.d/mysql stop
sudo mysqld_safe --skip-grant-tables &
sudo mysql -u root

设置新的MySQL root 用户密码

use mysql;
update user set password=PASSWORD("NEW-ROOT-PASSWORD") where User='root';
flush privileges;
quit

停止MySQL服务器：sudo /etc/init.d/mysql stop（如果有任何错误使用sudo）
启动 MySQL 服务器并测试它：sudo mysql -u root -p

Answer 2

如果你没有设置密码，你不能给mysql命令加上-p参数。仅以 mysql -u root

开始

MySQL CentOS：拒绝用户 ''@'localhost' 访问数据库

MySQL CentOS : Access denied for user ''@'localhost' to database

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