mysql密码错误次数过多被锁

mysql密码更改不了解决方法

ERROR 1820 (HY000): You must reset your password using ALTER USER statement before executing this statement.

今天在MySql5.7操作时报错：You must SET PASSWORD before executing this statement解决方法，需要的朋友可以参考下

ERROR 1820 (HY000): You must SET PASSWORD before executing this statement

非常诡异啊，明明用密码登陆进去了，怎么还提示需要密码。 
参考官方的一个文档，见http://dev.mysql.com/doc/refman/5.6/en/alter-user.html。如下操作后就ok了： 

mysql> create database yan1; 
ERROR 1820 (HY000): You must SET PASSWORD before executing this statement 
mysql> SET PASSWORD = PASSWORD('123456'); 
Query OK, 0 rows affected (0.03 sec) 

mysql> create database yan1; 
Query OK, 1 row affected (0.00 sec)

也就是用mysql> SET PASSWORD = PASSWORD('123456');这句话重新设置一次密码！大爷的，真费劲啊。 
这位仁兄也遇到了相同的问题。 


最近新装好的mysql在进入mysql工具时，总是有错误提示: 

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

或者 

# mysql -u root -p password 'newpassword' 
Enter password: 
mysqladmin: connect to server at 'localhost' failed 
error: 'Access denied for user 'root'@'localhost' (using password: YES)'

现在终于找到解决方法了。本来准备重装的，现在不必了。 
方法操作很简单，如下： 

# /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' and host='root' or host='localhost';//把空的用户密码都修改成非

空的密码就行了。 

mysql> FLUSH PRIVILEGES; 
mysql> quit # /etc/init.d/mysqld restart 
# mysql -uroot -p 
Enter password: <输入新设的密码newpassword>

MySql5.6操作时报错：You must SET PASSWORD before executing this statement解决 

mysql> SET PASSWORD = PASSWORD('123456'); 
Query OK, 0 rows affected (0.03 sec) 
mysql> create database roger; 
Query OK, 1 row affected (0.00 sec)

也就是用mysql> SET PASSWORD = PASSWORD('123456');这句话重新设置一次密码！

如果 MySQL 正在运行，首先杀之： killall -TERM mysqld。 

运行mysqld_safe --skip-grant-tables & 

如果此时不想被远程连接：mysqld_safe --skip-grant-tables --skip-networking &

使用mysql连接server

更改密码：update mysql.user set authentication_string=password('123qwe') where user='root' and Host = 'localhost';

*特别提醒注意的一点是，新版的mysql数据库下的user表中已经没有Password字段了

而是将加密后的用户密码存储于authentication_string字段

mysql> flush privileges;
mysql> quit;

修改完毕。重启

killall -TERM mysqld。 
mysqld_safe &

然后mysql就可以连接了

但是此时操作似乎功能不完全，还要alter user...

alter user 'root'@'localhost' identified by '123';

网文说酱紫也可以：set password for 'root'@'localhost'=password('123');

自启动

cp mysql.server /etc/init.d/mysql
 
  
chmod +x /etc/init.d/mysql
 
  
chkconfig --add mysql

reboot试试看

===========================

以下方法修改比较快捷：

mysql> SET PASSWORD = PASSWORD('new_password'); 

Query OK, 0 rows affected (0.01 sec) 

mysql> SELECT 1; 
+---+ | 1 | +---+ | 1 | +---+ 

1 row in set (0.00 sec)

转载于:https://blog.51cto.com/wutengfei/1931488