Access denied for ** 报错解决办法

方法一： 在 root 用户下：
# /etc/init.d/mysql stop
# mysqld_safe --user=mysql --skip-grant-tables --skip-networking &
# mysql -u root mysql
mysql> UPDATE user SET Password=PASSWORD('newpassword') where USER='root';
mysql> FLUSH PRIVILEGES;
mysql> quit

# /etc/init.d/mysql restart
# mysql -uroot -p
Enter password: <输入新设的密码newpassword>
完成。

 

以下部分是别人的相关信息整理：懒得自己整理，就直接粘过来了：

错误信息。

解释：YES,说明密码没有问题。可能是限制不让在本地登陆。于是实用

添加 -h 61.139.xx.252绕过本地测试，也未成功

[root@fms1 ok]# mysql -u root -p
Enter password:
ERROR 1045 (28000): Access denied for user 'root'@'localhost' (using password: YES)
[root@fms1 ok]# mysql -h 61.139.xx.252 -u root -p
Enter password:
ERROR 1130 (00000): Host '61.139.76.252' is not allowed to connect to this MySQL server

注释： 1130报错信息说明不允许远程访问。没有给该用户授权

然后重新修改密码后可以正常访问：

 

[root@fms1 ok]# /etc/init.d/mysql stop
Shutting down MySQL.[确定]
[root@fms1 ok]# mysqld_safe --user=mysql --skip-grant-tables --skip-networking &
[1] 6699
[root@fms1 ok]# mysql -u root mysql

.......
mysql> show databases;
+--------------------+
| Database           |
+--------------------+
| information_schema |
| mysql              |
| test               |
+--------------------+
3 rows in set (0.00 sec)

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

mysql> show tables;
+---------------------------+
| Tables_in_mysql           |
+---------------------------+
.............................

.............................

.............................
| user                      |
+---------------------------+
17 rows in set (0.00 sec)

mysql> UPDATE user SET Password=PASSWORD('newpassword') where USER='root';
Query OK, 3 rows affected (0.00 sec)
Rows matched: 3  Changed: 3  Warnings: 0

mysql> FLUSH PRIVILEGES;
Query OK, 0 rows affected (0.00 sec)

mysql> quit
Bye

注：到此修改密码完成。

[root@fms1 ok]# killall -9 mysqld
[root@fms1 ok]# /etc/init.d/mysql start
Starting MySQL[确定]
[root@fms1 ok]# mysql -u root -p
Enter password:
Welcome to the MySQL monitor.  Commands end with ; or /g.
Your MySQL connection id is 3
Server version: 5.0.45-community MySQL Community Edition (GPL)

Type 'help;' or '/h' for help. Type '/c' to clear the buffer.

mysql> GRANT ALL PRIVILEGES ON *.* TO root@'%' IDENTIFIED BY "newpasswd";  #用于给用户授权。
Query OK, 0 rows affected (0.00 sec)

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

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
mysql> update user set user="newname" where user="root"; #改名 。
Query OK, 4 rows affected (0.00 sec)
Rows matched: 4  Changed: 4  Warnings: 0

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

mysql> quit
Bye

支持完成了修改密码，授权，改名的工作。
[root@fms1 ok]# mysql -u centos -p
Enter password:
Welcome to the MySQL monitor.  Commands end with ; or /g.
Your MySQL connection id is 4
Server version: 5.0.45-community MySQL Community Edition (GPL)

Type 'help;' or '/h' for help. Type '/c' to clear the buffer.

mysql> show databases;

错误信息没有了。

 

总结：

错误提示:
# mysql -uroot -p
Enter password:
ERROR 1045 (28000): Access denied for user 'root'@'localhost' (using password: NO)

解决方法：1

方法一：
# /etc/init.d/mysql stop
# mysqld_safe --user=mysql --skip-grant-tables --skip-networking &
# mysql -u root mysql
mysql> UPDATE user SET Password=PASSWORD('newpassword') where USER='root';
mysql> FLUSH PRIVILEGES;
mysql> quit

# /etc/init.d/mysql restart
# mysql -uroot -p
Enter password: <输入新设的密码newpassword>
完成。

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