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修改mysql用户密码的方法

Jun 07, 2016 pm 03:15 PM
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欢迎进入Linux社区论坛,与200万技术人员互动交流 >>进入 修改mysql用户密码的方法总结 1.修改root密码 方法1:使用mysqladmin命令 --适用于记得root旧密码,修改root密码 语法: mysqladmin -u用户名 -p旧密码 password 新密码 例如: # mysqladmin -u root

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  修改mysql用户密码的方法总结

  1.修改root密码

  方法1:使用mysqladmin命令

  --适用于记得root旧密码,修改root密码

  语法:

  mysqladmin -u用户名 -p旧密码 password 新密码

  例如:

  # mysqladmin -u root -proot password mysql

  --注意:如当旧密码输入错误时会报如下错误

  # mysqladmin -u root -proot1 password mysql

  mysqladmin: connect to server at 'localhost' failed

  error: 'Access denied for user 'root'@'localhost' (using password: YES)'

  方法2:直接更新user表password字段

  --适用于忘记root密码,而对root密码进行重置

  

  Step 1: 修改MySQL的登录设置

  # vi /etc/my.cnf

  --windows系统是my.ini文件

  --在[mysqld]的段中加上一句:skip-grant-tables,如没有[mysqld]字段,可手动添加上

  [mysqld]

  datadir=/var/lib/mysql

  socket=/var/lib/mysql/mysql.sock

  skip-name-resolve

  skip-grant-tables

  Step 2: 重新启动mysql

  [root@gc ~]# service mysql restart

  Shutting down MySQL..[确定]

  Starting MySQL...[确定]

  Step 3: 登录并修改MySQL的root密码

  --此时直接用mysql即可无需密码即可进入数据库了

  [root@gc ~]# mysql

  Welcome to the MySQL monitor.  Commands end with ; or \g.

  Your MySQL connection id is 2

  Server version: 5.5.24 MySQL Community Server (GPL)

  Copyright (c) 2000, 2011, 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;

  Database changed

  mysql> update user set password=password('new_password') where user='root';

  Query OK, 5 rows affected (0.00 sec)

  Rows matched: 5  Changed: 5  Warnings: 0

  mysql> flush privileges;

  Query OK, 0 rows affected (0.00 sec)

  --注意:如果没做step1,直接用mysql登录时会报如下错误

  [root@gc ~]# mysql

  ERROR 1045 (28000): Access denied for user 'root'@'localhost' (using password: NO)

  Step 4: 将MySQL的登录设置修改回来

  再删除/etc/my.cnf文件中的skip-grant-tables

  Step 5: 重新启动mysql

  [root@gc ~]# service mysql restart

  Shutting down MySQL..[确定]

  Starting MySQL...[确定]

修改mysql用户密码的方法

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