mysql - 修改密码后无法登录mysql 5.7.9

Question

我已经安装了 Mysql Ver 14.14 Distrib 5.7.9, for Linux (x86_64) using EditLine wrapper 在 CentOS Linux release 7.1.1503

我使用此命令更改了 root 密码:

alter user 'root'@'localhost' identified by 'XXXXXXX';  
flush privileges;

重新登录后

[root@server ~]# mysql -u root -p
Enter password: 

ERROR 1524 (HY000): Plugin '*A6074285732753D325C55AD74E7517CF442C1A81' is not loaded

Answer 1

自早期版本的 mySQL 以来有两件事发生了变化(我使用的是 5.7.10):

1. systemd 现在用于管理 mySQL 而不是 mysqld_safe(这就是为什么我得到 -bash: mysqld_safe: command not found 错误 - 未安装)

2. user 表结构已更改。

所以要重置 root 密码，您仍然可以使用 --skip-grant-tables 选项启动 mySQL 并更新 user 表，但是您的操作方式已经改变.

1. Stop mysql:
systemctl stop mysqld

2. Set the mySQL environment option 
systemctl set-environment MYSQLD_OPTS="--skip-grant-tables"

3. Start mysql usig the options you just set
systemctl start mysqld

4. Login as root
mysql -u root

5. Update the root user password with these mysql commands
mysql> UPDATE mysql.user SET authentication_string = PASSWORD('MyNewPassword')
    -> WHERE User = 'root' AND Host = 'localhost';
mysql> FLUSH PRIVILEGES;
mysql> quit

6. Stop mysql
systemctl stop mysqld

7. Unset the mySQL envitroment option so it starts normally next time
systemctl unset-environment MYSQLD_OPTS

8. Start mysql normally:
systemctl start mysqld

Try to login using your new password:
7. mysql -u root -p

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引用

正如它在 http://dev.mysql.com/doc/refman/5.7/en/mysqld-safe.html 中所说的那样,

Note

As of MySQL 5.7.6, for MySQL installation using an RPM distribution, server startup and shutdown is managed by systemd on several Linux platforms. On these platforms, mysqld_safe is no longer installed because it is unnecessary. For more information, see Section 2.5.10, “Managing MySQL Server with systemd”.

将您带到 http://dev.mysql.com/doc/refman/5.7/en/server-management-using-systemd.html它在页面底部提到 systemctl set-environment MYSQLD_OPTS=。

密码重置命令位于 http://dev.mysql.com/doc/refman/5.7/en/resetting-permissions.html 的底部