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Warning: mysql_query() [function.mysql-query]: Can't connect to local MySQL server through socket '/var/lib/mysql/mysql.sock' (2) in /home/www/cheapair/php/upgrades/4.x/upgrade42-43.php on line 18

Warning: mysql_query() [function.mysql-query]: A link to the server could not be established in /home/www/cheapair/php/upgrades/4.x/upgrade42-43.php on line 18
Alteration of links_categories table failed!
2002: Can't connect to local MySQL server through socket '/var/lib/mysql/mysql.sock' (2)