MySQL數據庫忘記root密碼解決

MySQL數據庫忘記root密碼解決：

• 進入配置文件/etc/my.cnf
• 在[mysqld]下加入一條語句：skip-grant-tables

• [mysqld] 
  datadir=/var/lib/mysql 
  socket=/var/lib/mysql/mysql.sock 
  skip-grant-tables 

   

• 重新啓動mysqld：service mysqld restart
• 無密碼登錄MySQL數據庫：mysql -uroot -p

• 進入數據庫後操作：

  # 使用mysql庫
  mysql> use mysql;
  Reading table information for completion of table and column names
  You can turn off this feature to get a quicker startup with -A
  Database changed
  # 一定要查看清楚user表的用戶密碼字段名
  mysql> select * from user limit 1\G;
  ******************* 1. row *********************
  Host: localhost
  User: root
  Select_priv: Y
  ...（此處省略）
  plugin: mysql_native_password
  auther_string: *81F5E21E35407D884A6CD4A731AEBFB7AF209E1B
  # 這串字符就是加密後的密碼，選取其字段名
  password_expired: N
  password_last_changed: 2018-05-31 15:12:34
  password_lifetime: NULL
  account_locked: N
  1 row in set (0.00 sec)

• 修改密碼：

  mysql> update user set auther_string=PASSWORD('123') where User='root';
  Query OK, 1 row affected, 1 warning (0.00 sec)
  Rows matched: 2 Changed: 1 Warnings: 1

• 修改成功後退出數據庫，將配置文件中的無密碼登錄註釋掉
• 重啓mysqld： [root@BDKVM01 ~]# systemctl restart mysqld

• 驗證：[root@BDKVM01 ~]# mysql -uroot -p123