MySQL忘记密码，或：root密码重置报错：mysqladmin: connect to server at 'localhost' failed的解决方案

MySQL root密码重置报错：mysqladmin: connect to server at 'localhost' failed的解决方案

 

1  登陆失败,mysqladmin修改密码失败

[root@mysql var]# mysqladmin -u root password '123456'

mysqladmin: connect to server at 'localhost' failed

error: 'Access denied for user 'root'@'localhost' (using password: NO)'

 

2 停止mysql服务

[root@mysql var]# /etc/init.d/mysqld stop

Shutting down MySQL.... SUCCESS!

 

3 安全模式启动

[root@mysql var]# mysqld_safe --skip-grant-tables &

（路径不一样：/opt/mysql/product/5.5.25a/bin/mysqld_safe --skip-grant-tables &）

[1] 10912

[root@mysql var]# 110407 17:39:28 mysqld_safe Logging to '/usr/local/mysql/var//mysql.chinascopefinanical.com.err'.

110407 17:39:29 mysqld_safe Starting mysqld daemon with databases from /usr/local/mysql/var/

 

4 无密码root帐号登陆

[root@mysql var]# /usr/bin/mysql -u root -p 【注释，在下面的要求你输入密码的时候，你不用管，直接回车键一敲就过去了】

Enter password:

Welcome to the MySQL monitor.  Commands end with ; or g.

Your MySQL connection id is 48

Server version: 5.1.41-log Source distribution

 

 

Type 'help;' or 'h' for help. Type 'c' to clear the current input statement.

 

 

mysql> use mysql;

Database changed

 

5 手动update修改密码

mysql> update mysql.user set authentication_string=password("123456") where user='root' and host='localhost';

Query OK, 1 row affected (0.00 sec)

Rows matched: 1  Changed: 1  Warnings: 0

 

 

mysql> flush privileges;

Query OK, 0 rows affected (0.00 sec)

 

 

mysql> quit

Bye

[root@mysql var]# mysql -u root -p guNNhtqhjUnfky6ahyVh

Welcome to the MySQL monitor.  Commands end with ; or g.

Your MySQL connection id is 172

Server version: 5.1.41-log Source distribution

 

 

Type 'help;' or 'h' for help. Type 'c' to clear the current input statement.

 

 

mysql> quit

Bye

 

 

6 正常重新启动

[root@mysql var]# service mysqld restart

Shutting down MySQL..110407 17:45:29 mysqld_safe mysqld from pid file /usr/local/mysql/var//mysql.chinascopefinanical.com.pid ended

SUCCESS!

Starting MySQL.. SUCCESS!