Can't connect to local MySQL server through socket '/var/lib/mysql/mysql.sock' (2)

FILE: /var/www/html/sungene/ThinkPHP/Lib/Core/Db.class.php 　LINE: 323

[25-12-22 23:12:12] /var/www/html/sungene/ThinkPHP/Lib/Core/Db.class.php (323) DbMysql->connect()
[25-12-22 23:12:12] /var/www/html/sungene/ThinkPHP/Lib/Driver/Db/DbMysql.class.php (187) Db->initConnect()
[25-12-22 23:12:12] /var/www/html/sungene/ThinkPHP/Lib/Driver/Db/DbMysql.class.php (425) DbMysql->query(SHOW COLUMNS FROM `tp_product`)
[25-12-22 23:12:12] /var/www/html/sungene/ThinkPHP/Lib/Core/Model.class.php (269) DbMysql->getFields(tp_product)
[25-12-22 23:12:12] /var/www/html/sungene/ThinkPHP/Lib/Core/Model.class.php (245) Model->flush()
[25-12-22 23:12:12] /var/www/html/sungene/ThinkPHP/Lib/Core/Model.class.php (2347) Model->_checkTableInfo()
[25-12-22 23:12:12] /var/www/html/sungene/ThinkPHP/Lib/Core/Model.class.php (195) Model->db(0, )
[25-12-22 23:12:12] /var/www/html/sungene/ThinkPHP/Common/common.php (294) Model->__construct(Product, , )
[25-12-22 23:12:12] /var/www/html/sungene/Home/Lib/Action/ProductAction.class.php (16) M(Product)
[25-12-22 23:12:12] /var/www/html/sungene/ThinkPHP/Common/common.php (321) ProductAction->__construct()
[25-12-22 23:12:12] /var/www/html/sungene/ThinkPHP/Lib/Core/App.class.php (205) A(Product)
[25-12-22 23:12:12] /var/www/html/sungene/ThinkPHP/Lib/Core/App.class.php (413) App::exec()
[25-12-22 23:12:12] /var/www/html/sungene/ThinkPHP/Lib/Core/Think.class.php (77) App::run()
[25-12-22 23:12:12] /var/www/html/sungene/ThinkPHP/Common/runtime.php (483) Think::start()
[25-12-22 23:12:12] /var/www/html/sungene/ThinkPHP/ThinkPHP.php (122) require(/var/www/html/sungene/ThinkPHP/Common/runtime.php)
[25-12-22 23:12:12] /var/www/html/sungene/index.php (10) require(/var/www/html/sungene/ThinkPHP/ThinkPHP.php)