MySQL忘記root密碼的找回方法

標籤：

    （1）登入到資料庫所在伺服器，手工kill掉MySQL進程：  

kill ‘ cat /mysql-data-directory/hostname.pid‘

    其中，/mysql-data-directory/hostname.pid指的是MySQL資料目錄下的.pid檔案，它記錄了MySQL服務的進程號。     （2）使用--skip-grant-tables選項重啟MySQL服務：

[[email protected] mysql]# ./bin/mysqld_safe --skip-grant-tables --user=root &[1] 17299[[email protected] mysql]# 151006 13:14:41 mysqld_safe Logging to ‘/alidata/log/mysql/error.log‘.151006 13:14:41 mysqld_safe Starting mysqld daemon with databases from /alidata/server/mysql/data

    其中--skip-grant-tables選項的意思是啟動MySQL服務的時候跳過許可權表認證。啟動後，串連到MySQL的root將不需要命令。     （3）用空密碼的root使用者串連到MySQ，並且更新root口令：

[[email protected] ~]# mysql -urootWelcome to the MySQL monitor. Commands end with ; or \g.Your MySQL connection id is 4Server version: 5.5.37-log MySQL Community Server (GPL) Copyright (c) 2000, 2014, Oracle and/or its affiliates. All rights reserved. Oracle is a registered trademark of Oracle Corporation and/or itsaffiliates. Other names may be trademarks of their respectiveowners. Type ‘help;‘ or ‘\h‘ for help. Type ‘\c‘ to clear the current input statement. mysql> set password = password(‘ysj123‘);ERROR 1290 (HY000): The MySQL server is running with the --skip-grant-tables option so it cannot execute this statementmysql> update mysql.user set password=password(‘123456‘) where user=‘root‘ and host=‘localhost‘;Query OK, 1 row affected (0.00 sec)Rows matched: 1 Changed: 1 Warnings: 0

    此時，由於使用了--skip-grant-tables選項啟動，使用“set password”命令更改密碼失敗，直接更新user表的password欄位後更改密碼成功。     （4）重新整理許可權表，使得許可權認證重新生效：

mysql> flush privileges;Query OK, 0 rows affected (0.00 sec)

     （5）重新用root登入時，必須輸入新口令：

[[email protected] ~]# mysql -urootERROR 1045 (28000): Access denied for user ‘root‘@‘localhost‘ (using password: NO)[[email protected] ~]# mysql -uroot -pEnter password:Welcome to the MySQL monitor. Commands end with ; or \g.Your MySQL connection id is 8Server version: 5.5.37-log MySQL Community Server (GPL) Copyright (c) 2000, 2014, Oracle and/or its affiliates. All rights reserved. Oracle is a registered trademark of Oracle Corporation and/or itsaffiliates. Other names may be trademarks of their respectiveowners. Type ‘help;‘ or ‘\h‘ for help. Type ‘\c‘ to clear the current input statement.

     注意：在MySQL中，密碼丟失後無法找回，只能通過上述方式修改密碼。 別忘了給個贊哦！~

MySQL忘記root密碼的找回方法