mysql重置密碼和mysql error 1044(42000)錯誤

#mysql錯誤：（密碼不正確，須要重置密碼）

ERROR 1045 (28000): Access denied for user 'root'@'localhost' (using password: YES)

#編輯配置文件

[root@m1 mysql]# vi /roobo/server/mysql/my.cnf

[mysqld]

skip-grant-tables  

#修改完後重啓服務

[root@m1 mysql]# /etc/init.d/mysqld restart

#登陸數據庫

[root@m1 mysql]# mysql
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 1
Server version: 5.6.24-log Source distribution

Copyright (c) 2000, 2015, 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>

mysql> use mysql;
mysql> update user set password=password("你的新密碼") where user="root";
mysql> flush privileges;
mysql> quit

#再把vi my.cnf 配置文件中下面參數刪除。

[mysqld]

skip-grant-tables  

#修改完後重啓服務

[root@m1 mysql]# /etc/init.d/mysqld restart

#再用設置的密碼登陸

mysql -uroot -p

passwd:******

 

---

 

mysql error 1044(42000)錯誤

[root@m1 ~]# mysql -uroot -p
Enter password:
ERROR 1049 (42000): Unknown database '127.0.0.1'
[root@m1 ~]# mysql -uroot -p
Enter password:
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 18
Server version: 5.6.24-log Source distribution

Copyright (c) 2000, 2015, 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.

 

#受權

mysql> grant all on work.* to work@'192.168.1.4' identified by 'juan3652014';
ERROR 1044 (42000): Access denied for user 'root'@'localhost' to database 'work'

 

緣由：  受權須要WITH GRANT OPTION 才能受權，不然會報。

mysql> show grants for root@'localhost';
+----------------------------------------------------------------------------------------------------------------------+
| Grants for root@localhost |
+----------------------------------------------------------------------------------------------------------------------+
| GRANT ALL PRIVILEGES ON *.* TO 'root'@'localhost' IDENTIFIED BY PASSWORD '*F109C974766912D490ECD7E3C8754542FC773A49' |
| GRANT PROXY ON ''@'' TO 'root'@'localhost' WITH GRANT OPTION 
+----------------------------------------------------------------------------------------------------------------------+
2 rows in set (0.00 sec)

 

解決方法：

#登陸mysql

mysql -uroot -p -h 127.0.0.1

mysql> use mysql
Database changed
mysql> select user,host from user;
+--------+-------------+
| user | host |
+--------+-------------+
| root | 127.0.0.1 |
| rep | 192.168.1.% |
| work | 192.168.1.4 |
| root | localhost |
| zabbix | localhost |
+--------+-------------+
5 rows in set (0.00 sec)

#受權成功
grant all on work.* to work@'192.168.1.4' identified by 'juan3652014';
flush privileges;

 

 如上所示，root@localhost帳號沒有WITH GRANT OPTION選項，關於WITH GRANT OPTION選項，若是想讓受權的用戶，也能夠將這些權限授予給其餘用戶，須要選項 「WITH GRANT OPTION「 。也就是說有這個選項就能夠將權限傳遞給第三方。這也是上面root@localhost用戶給其它用後受權報錯的緣由，若是以 root@127.0.0.1登陸（此帳號擁有WITHGRANT OPTION選項），建立用戶並受權就不會有這個錯誤。