1. 環境準備
首先確認服務器出於安全的狀態,也就是沒有人能夠任意地連接MySQL數據庫。
因爲在重新設置MySQL的root密碼的期間,MySQL數據庫完全出於沒有密碼保護的
狀態下,其他的用戶也可以任意地登錄和修改MySQL的信息。可以採用將MySQL對
外的端口封閉,並且停止Apache以及所有的用戶進程的方法實現服務器的準安全
狀態。最安全的狀態是到服務器的Console上面操作,並且拔掉網線。
2.修改MySQL的登錄設置:
vi /etc/my.cnf
在[mysqld]的段中加上一句:skip-grant-tables
例如:
[mysqld]
datadir=/var/lib/mysql
socket=/var/lib/mysql/mysql.sock
skip-grant-tables
保存並且退出vi。
3.重新啓動mysqld
/etc/init.d/mysqld restart 或者service mysqld restart
Stopping MySQL: [ OK ]
Starting MySQL: [ OK ]
4.登錄並修改MySQL的root密碼
[root@bogon bin] /usr/bin/mysql
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 2
Server version: 5.5.49 MySQL Community Server (GPL) by Remi
Copyright (c) 2000, 2016, 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;
mysql> UPDATE user SET Password = password ( 'lizhen7' ) WHERE User = 'root' ;
Query OK, 0 rows affected (0.00 sec)
Rows matched: 4 Changed: 0 Warnings: 0
至此,密碼修改完畢
5.將MySQL的登錄設置修改回來
vim /etc/my.cnf
將剛纔在[mysqld]的段中加上的skip-grant-tables刪除
保存並且退出vi。
6.重新啓動mysqld
/etc/init.d/mysqld restart
Stopping MySQL: [ OK ]
Starting MySQL: [ OK ]