修改mysql用戶密碼的方法總結

修改mysql用戶密碼的方法總結

 

1.修改root密碼

方法1:使用mysqladmin命令

–適用於記得root舊密碼,修改root密碼

語法: www.aiwalls.com  

mysqladmin -u用戶名 -p舊密碼 password 新密碼

例如:

# mysqladmin -u root -proot password mysql

–註意:如當舊密碼輸入錯誤時會報如下錯誤

# 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

–適用於忘記root密碼,而對root密碼進行重置

  www.aiwalls.com  

Step 1: 修改MySQL的登錄設置

# vi /etc/my.cnf 

–windows系統是my.ini文件

–在[mysqld]的段中加上一句:skip-grant-tables,如沒有[mysqld]字段,可手動添加上

[mysqld]

datadir=/var/lib/mysql

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

skip-name-resolve

skip-grant-tables

 

Step 2: 重新啟動mysql

[root@gc ~]# service mysql restart

Shutting down MySQL..[確定]

Starting MySQL…[確定]

 

Step 3: 登錄並修改MySQL的root密碼

–此時直接用mysql即可無需密碼即可進入資料庫瞭

[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)

–註意:如果沒做step1,直接用mysql登錄時會報如下錯誤

[root@gc ~]# mysql

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

 

Step 4: 將MySQL的登錄設置修改回來

再刪除/etc/my.cnf文件中的skip-grant-tables

 

Step 5: 重新啟動mysql

[root@gc ~]# service mysql restart

Shutting down MySQL..[確定]

Starting MySQL…[確定]

 

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