目錄

• 設定使用者密碼
  • 方法一
  • 方法二
• 丟失root密碼找回
• 新增使用者

設定使用者密碼

方法一

SET PASSWORD FOR 'root'@'localhost' = PASSWORD('NewPassword');

mysql> SET PASSWORD FOR 'root'@'localhost' = PASSWORD('123456');
Query OK, 0 rows affected (0.00 sec)

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

mysql> \q
Bye
[
 
[email protected] ~]# mysql -uroot -p123456
Warning: Using a password on the command line interface can be insecure.
Welcome to the MySQL monitor.  Commands end with ; or \g.
Your MySQL connection id is 5
Server version: 5.6.39 MySQL Community Server (GPL)

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>
 

方法二

UPDATE user SET Password = PASSWORD('newpass') WHERE user = 'root';

mysql> UPDATE mysql.user SET Password = PASSWORD('234567') WHERE user = 'root';
Query OK, 2 rows affected (0.00 sec)
Rows matched: 2  Changed: 2  Warnings: 0

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

mysql> \q
Bye
# 這裡使用新密碼登陸
[
 
[email protected] ~]# mysql -uroot -p234567
Warning: Using a password on the command line interface can be insecure.
Welcome to the MySQL monitor.  Commands end with ; or \g.
Your MySQL connection id is 16
Server version: 5.6.39 MySQL Community Server (GPL)

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>

丟失root密碼找回

兩種方式：

1. 在啟動的時候增加 --skip-grant-tables 引數啟動
2. 在my.cnf配置檔案中的mysql模組中新增下面引數 skip-grant-tables = 1

上面兩種方式效果相同

使用後，啟動mysql，就可以使直接使用mysql 命令登陸，無需密碼，進入後直接修改root密碼即可，最後去掉引數或者配置檔案中的引數重啟資料庫即可；

新增使用者