Can’t connect MySQL server through socket的解决方法

mysql,Mysqldump,Mysqladmin,php链接mysql服务常会提示下面错误：

1	ERROR 2002 (HY000): Can't connect to local MySQL server through socket '/var/lib/mysql/mysql.sock' (2)

这是因为修改mysql服务的了socket文件mysql.sock位置，而致使没法经过mysql socket文件链接到mysql服务引发的，具体解决办法以下：
一、查看mysql服务的socket文件位置：
mysql socket文件的位置是在/etc/my.cnf中设置的，cat /etc/my.cnf内容以下：

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[mysqld] datadir=/storage/db/mysql socket=/storage/db/mysql/mysql.sock user=mysql

其中socket等于的路径就是socket文件的位置，咱们只要修改my.cnf文件,告诉mysql,mysqldump,mysqladmin mysql服务的socket位置在哪里就能够。

2、修改my.cnf文件：
在/etc/my.cnf文件中添加以下内容，并重启mysqls服务，便可解决mysql,mysqldump,mysqladmin的“Can't connect to local MySQL server through socket '/var/lib/mysql/mysql.sock'”问题：

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[mysqld] datadir=/storage/db/mysql socket=/storage/db/mysql/mysql.sock   [mysql] socket=/storage/db/mysql/mysql.sock   [mysqldump] socket=/storage/db/mysql/mysql.sock   [mysqladmin] socket=/storage/db/mysql/mysql.sock

三、php链接mysql服务提示"Can't connect to local MySQL server through socket..."的解决方法
有时候mysql服务正常运行,用户名密码也彻底正确，使用php的mysql_connect函数却链接不了mysql，调用php的mysql_error()函数提示“Can't connect to local MySQL server through socket '/var/lib/mysql/mysql.sock'”，这是咱们须要修改/etc/php.ini文件。
在/etc/php.ini文件中"[MySQL]"项下找到"mysql.default_socket"，并设置其值指向正确的mysql服务socket文件便可，如:

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[MySQL] ...省略n行... mysql.default_socket = "/storage/db/mysql/mysql.sock"

四、python链接mysql提示"Can't connect to local MySQL server through socket..."的解决方法:
在链接mysql数据库函数中指定socket文件，以下：

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#!/usr/bin/python from MySQLdb import connect conn = connect(db="pzy", user="root", host="localhost", unix_socket="/storage/db/mysql/mysql.sock") cur = conn.cursor() count=cur.execute("show databases") print 'there has %s dbs' % count conn.commit() conn.close()

5. php pdo链接mysql提示"Can't connect to local MySQL server through socket..."的解决方法:
一样在链接字符串添加mysql socket文件的位置便可，以下:

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<?php $dsn = "mysql:host=localhost;dbname=pzy;unix_socket=/storage/db/mysql/mysql.sock"; $db = new PDO($dsn, 'root', ''); $rs = $db->query("SELECT * FROM qrtest"); while($row = $rs->fetch()){     print_r($row); } ?>