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.2cto.com mysqladmin -u用戶名 -p舊密碼 password 新密碼 例如： # mysqladmin -u root -proot password mysql --注意：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.2cto.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數據庫了 [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]
