Mac - MySQL初始密碼忘記重置MySQL root密碼

 

在什么情況下，需要重置root密碼呢？那就是我們忘記了。還有一種比較坑的，那就是筆者的這種情況。按照正常的情況下，MySQL安裝完之后，會彈出一個對話框，顯示着一個臨時的root密碼，但無論筆者如何重裝MySQL，始終不給我一個臨時的root的密碼，導致筆者一直無法登陸MySQL，沒辦法，只能用硬的，那就是重置密碼。

 

停止MySQL的服務，打開系統的偏好設置，找到MySQL 進去后，點擊Stop MySQL Server即可。

step1：
蘋果->系統偏好設置->最下邊點mysql 在彈出頁面中 關閉mysql服務（點擊stop mysql server）
step2：
進入終端輸入：cd /usr/local/mysql/bin/
回車后 登錄管理員權限 sudo su
回車后輸入以下命令來禁止mysql驗證功能 ./mysqld_safe --skip-grant-tables &
回車后mysql會自動重啟（偏好設置中mysql的狀態會變成running）

 

 

開啟兩個終端，在第一個終端輸入sudo /usr/local/mysql/bin/mysqld_safe --skip-grant-tables，輸入當前用戶的密碼:

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

那么就換下面這種：

macdeMacBook-Pro:~ mac$ mysql -uroot -h127.0.0.1 -p
Enter password: 
ERROR 1045 (28000): Access denied for user 'root'@'localhost' (using password: YES)

 

然后在第二個終端輸入sudo /usr/local/mysql/bin/mysql -u root，然后輸入當前用戶的密碼后，出現以下的界面

macdeMacBook-Pro:~ mac$ sudo /usr/local/mysql/bin/mysql -u root
Password:
Welcome to the MySQL monitor.  Commands end with ; or \g.
Your MySQL connection id is 3
Server version: 5.7.22 Homebrew

Copyright (c) 2000, 2018, 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> 

 

然后輸入命令 UPDATE mysql.user SET authentication_string=PASSWORD('新密碼') WHERE User='root';回車，出現以下的界面，說明修改成功。

mysql> UPDATE mysql.user SET authentication_string=PASSWORD('123456') WHERE User='root';
Query OK, 1 row affected, 1 warning (0.00 sec)
Rows matched: 1  Changed: 1  Warnings: 1

 

接下來輸入FLUSH PRIVILEGES;回車，出現下面的界面

mysql> FLUSH PRIVILEGES;
Query OK, 0 rows affected (0.01 sec)

 

最后，輸入\q，退出。關閉第一個終端，回到系統的偏好設置，重新開啟MySQL即可。

mysql> \q
Bye

 

 

macdeMacBook-Pro:~ mac$ mysql -uroot -h127.0.0.1 -p
Enter password: 
ERROR 1045 (28000): Access denied for user 'root'@'localhost' (using password: YES)
macdeMacBook-Pro:~ mac$ sudo /usr/local/mysql/bin/mysql -u root
Password:
Welcome to the MySQL monitor.  Commands end with ; or \g.
Your MySQL connection id is 3
Server version: 5.7.22 Homebrew

Copyright (c) 2000, 2018, 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> UPDATE mysql.user SET authentication_string=PASSWORD('123456') WHERE User='root';
Query OK, 1 row affected, 1 warning (0.00 sec)
Rows matched: 1  Changed: 1  Warnings: 1

mysql> FLUSH PRIVILEGES;
Query OK, 0 rows affected (0.01 sec)

mysql> \q
Bye
macdeMacBook-Pro:~ mac$