怎么解決MySQL中的ERROR 2002(HY000)報錯問題

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[root@testmysql bin]# ./mysql
ERROR 2002 (HY000): Can't connect to local MySQL server through socket '/tmp/mysql.sock' (2)

解決方法：

由于mysql 默認的mysql.sock 是在/usr/local/mysql/data/mysql.sock，但linux系統總是去/tmp/mysql.sock查找，所以會報錯

1.直接指定mysql通道

據我知道的（ps：我是菜鳥，請糾正），老版本(5.4之前)的是：/var/lib/mysql/mysql.sock

 在新版本中默認是在/usr/local/mysql/data/mysql.sock，具體的可以去查看my.cnf文件里面

[root@testmysql bin]# ./mysql --socket=/usr/local/mysql/data/mysql.sock
Welcome to the MySQL monitor.  Commands end with ; or \g.
Your MySQL connection id is 1
Server version: 5.6.4-m7 Source distribution
Copyright (c) 2000, 2011, Oracle and/or its affiliates. All rights reserved.
Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.
Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.
mysql>

2. 創建符號連接：

為mysql.sock增加軟連接（相當于windows中的快捷方式）。

ln -s /var/lib/mysql/mysql.sock /tmp/mysql.sock

eg：
root@localhost ~]# mysql
ERROR 2002 (HY000): Can't connect to local MySQL server through socket '/tmp/mysql.sock' (2)
[root@testmysql bin]# ln -s /var/lib/mysql/mysql.sock /tmp/mysql.sock

插曲：有可能你在建立連接的時候出現下面的情況，
[root@testmysql bin]# ln -vs /usr/local/mysql/data/mysql.sock /tmp/mysql.sock
ln: creating symbolic link `/tmp/mysql.sock': File exists
沒關系，加上-f參數就可以了。-f的主要過程：先將同名的軟鏈接dd刪除，然后再創建硬鏈接dd

[root@testmysql bin]# ln -f /usr/local/mysql/data/mysql.sock /tmp/mysql.sock
[root@testmysql bin]# ./mysql
Welcome to the MySQL monitor.  Commands end with ; or \g.
Your MySQL connection id is 1
Server version: 5.6.4-m7 Source distribution
Copyright (c) 2000, 2011, Oracle and/or its affiliates. All rights reserved.
Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.
Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.
mysql>

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