ERROR 2002 (HY000): Can't connect to local MySQL server through socket '/tmp

在安裝好了MySQL之後，使用了新的配置檔案後，MySQL伺服器可以成功啟動，但在登陸的時候出現了ERROR 2002 (HY000): Can't connect to local MySQL server through socket，即無法通過socket連接配接到mysql伺服器，同時提供了socket檔案的位置。下面是這個問題的描述與解決辦法。

一、故障現象

在登入mysql資料庫時報錯為如下所示：

 ~]# mysql -uroot -p

Enter password: 

ERROR 2002 (HY000): Can't connect to local MySQL server through socket '/application/mysql5.1.72/tmp/mysql.sock' (2)

二、故障分析

#檢視mysql執行個體的狀态

~]# netstat -tunp  | grep 3306

tcp        0      0 :::3306                     :::*                        LISTEN      13001/mysqld

#檢視my.cnf關于socket的配置

~]# more /etc/my.cnf |grep sock

 ~]# more /etc/my.cnf |grep sock

socket          = /application/mysql5.1.72/tmp/mysql.sock

#由上可知my.cnf中定義的為/tmp目錄下，而錯誤提示為/application/mysql5.1.72/tmp/mysql.sock目錄下

#也就是說mysqld已經聲稱了正确的sock檔案，但用戶端連接配接還是從初始目錄去找sock檔案

三、解決方法 

先停止mysql伺服器

~]# /etc/init.d/mysqld stop

Shutting down MySQL.[  OK  ]

#修改my.cnf，如下

~]# vi /etc/my.cnf

[mysql]

no-auto-rehash

socket = /application/mysql5.1.72/tmp/mysql.sock  #添加該行

#重新開機mysql伺服器

~]# service mysqld start

Starting MySQL..[  OK  ]

#再次連接配接正常

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

Your MySQL connection id is 3

Server version: 5.1.72 Source distribution

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

mysql>

本文轉自chengong1013 51CTO部落格，原文連結：http://blog.51cto.com/purify/1792482，如需轉載請自行聯系原作者