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linux下mysql密码重置方法以及问题处理

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Release: 2016-06-07 15:40:12
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感谢这两篇文章作者.验证正确 1.linux下mysql的root密码忘记 2.Starting MySQL.Manager of pid-file quit without updating file. 1.首先确认服务器出于安全的状态,也就是没有人能够任意地连接MySQL数据库。 因为在重新设置MySQL的root密码的期间,MySQL数

感谢这两篇文章作者.验证正确

1.linux下mysql的root密码忘记

2.Starting MySQL.Manager of pid-file quit without updating file.


1.首先确认服务器出于安全的状态,也就是没有人能够任意地连接MySQL数据库。 
因为在重新设置MySQL的root密码的期间,MySQL数据库完全出于没有密码保护的 
状态下,其他的用户也可以任意地登录和修改MySQL的信息。可以采用将MySQL对 
外的端口封闭,并且停止Apache以及所有的用户进程的方法实现服务器的准安全 
状态。最安全的状态是到服务器的Console上面操作,并且拔掉网线。 
2.修改MySQL的登录设置: 
#vi /etc/my.cnf 
在[mysqld]的段中加上一句:skip-grant-tables 
例如: 
[mysqld] 
datadir=/var/lib/mysql 
socket=/var/lib/mysql/mysql.sock 
skip-grant-tables 
保存并且退出vi。 
3.重新启动mysqld 
# /etc/init.d/mysqld restart 
Stopping MySQL: [ OK ] 
Starting MySQL: [ OK ] 
4.登录并修改MySQL的root密码 
# /usr/bin/mysql 
Welcome to the MySQL monitor. Commands end with ; or \g. 
Your MySQL connection id is 3 to server version: 3.23.56 
Type 'help;' or '\h' for help. Type '\c' to clear the buffer. 
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 Password = password ( 'new-password' ) WHERE User = 'root' ; 
Query OK, 0 rows affected (0.00 sec) 
Rows matched: 2 Changed: 0 Warnings: 0 
mysql> flush privileges ; 
Query OK, 0 rows affected (0.01 sec) 
mysql> quit 
Bye 
5.将MySQL的登录设置修改回来 
# vi /etc/my.cnf 
将刚才在[mysqld]的段中加上的skip-grant-tables删除 
保存并且退出vi。 
6.重新启动mysqld 
# /etc/init.d/mysqld restart 
Stopping MySQL: [ OK ] 
Starting MySQL: [ OK ]

异常处理:mysqld启动不起来

ps -A|grep mysql

8016 pts/2 00:00:00 mysqld_safe

8037 pts/2 00:00:00 mysqld

kill -9 8037

kill -9 8016

/etc/init.d/mysql restart

MySQL manager or server PID file could not be found! [FAILED]

Starting MySQL [ OK ]

命令总结:

mysql status

mysql start/restart

sarvice mysqld restart 

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