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                ## 設置及修改MySQL root用戶密碼 * MySQL數據庫用戶安全策略介紹 安裝mysql數據庫后,默認的管理員root密碼是空,這很不安全,因此需要設置一個密碼 > 為root設置密碼 > 刪除無用的MySQL庫內的用戶帳戶 > 刪除默認存在的test數據庫 * 刪除所有MySQL中的用戶,包括root超級用戶 ``` root@rose 03:55:27>delete from mysql.user; Query OK, 1 row affected (0.01 sec) ``` * 增加admin并提升為超級管理員,即和root等價的用戶,只是名字不同(with grant option參數的使用) ``` root@rose 04:20:34>grant all privileges on *.* to 'admin'@'localhost' identified by 'aaaaaa' with grant option; Query OK, 0 rows affected (0.00 sec) root@rose 04:23:00>flush privileges; Query OK, 0 rows affected (0.00 sec) ``` * 為管理員root設置密碼的方法(初始化好數據庫時做) ``` #以下命令適合linux命令行,不是mysql客戶端命令行 mysqladmin -uroot password 'newpassword' #沒有密碼的用戶設置密碼命令 mysqladmin -uroot -p'oldpassword' password 'newpasswrod' -S /usr/local/mysql/data/3306/mysql.sock # 指定sock適合多實例方式 ``` * 修改管理員root密碼方法二: ``` update mysql.user set password=password('newpass') where user='root' and host='localhost'; # 此方法適合 --skip-grant-tables 方式登錄修改密碼 root@rose 04:23:00>flush privileges; Query OK, 0 rows affected (0.00 sec) ``` * 修改管理員root密碼方法三: ``` set password=password('newpass'); # 此方法不適合 --skip-grant-tables 方式修改當前用戶的密碼 root@rose 04:23:00>flush privileges; Query OK, 0 rows affected (0.00 sec) ```
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