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MySql8.x 修改密码

发布时间:2022-11-03 11:12:31 所属栏目:MySql教程 来源:
导读:  1、常用方案(不适合8.x) 1.1 修改配置

  修改配置文件/etc/my.cnf

  增加如下内容:

  # 无密码登录
  skip-grant-tables
  1.2重启mysql服务

  systemctl restart mysqld
  
  1、常用方案(不适合8.x) 1.1 修改配置
 
  修改配置文件/etc/my.cnf
 
  增加如下内容:
 
  # 无密码登录
  skip-grant-tables
  1.2重启mysql服务
 
  systemctl restart mysqld
  1.3 修改mysql密码
 
  在输入密码时,直接回车。
 
  # mysql -u root -p
  Enter password:   <直接回车>
  Welcome to the MySQL monitor.  Commands end with ; or \g.
  Your MySQL connection id is 7
  Server version: 8.0.31 MySQL Community Server - GPL
  Copyright (c) 2000, 2022, Oracle and/or its affiliates.
  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>
  修改update user set password=PASSWORD('123456') where user='root'
 
  mysql> use mysql
  mysql> update user set password=PASSWORD('123456') where user='root';
  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 '('123456') where user='root'' at line 1
  mysql>
  出现了语法错误之后,查看user表中字段。发现表中没有password 字段,所以update user set password 会出错,查找资料发现mysql 8.0.2之后数据库Mysql修改密码,密码规则发生变化,改变了user表。
 
  2、解决方案(适合8.x)
 
  恢复配置文件/etc/my.cnf默认配置,然后重启mysqld服务
 
  (1)通过/var/log/mysqld.log查询密码
 
  在mysqld.log中查询以下记录:
 
  A temporary password is generated for root@localhost:XXXXXXXX
 
  2022-10-11T07:22:24.592233Z 6 [Note] [MY-010454] [Server] A temporary password is generated for root@localhost: T7w4:nawmL(m
  (2)登录mysql
 
  (3)修改mysql密码
 
  mysql> ALTER USER 'root'@'localhost' IDENTIFIED BY 'Mysql#135';
  Query OK, 0 rows affected (0.02 sec)
  mysql> FLUSH PRIVILEGES;
  Query OK, 0 rows affected (0.00 sec)
  mysql>
  成功
 

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