Cererea nu a putut fi executata

[SET NAMES 'utf8' COLLATE 'utf8_general_ci';] - Can't connect to local MySQL server through socket '/var/lib/mysql/mysql.sock' (2) -
- error in file include/include_db.php on line # 0 : executeQuery
- error in file include/include_db.php on line # 0 : openConnection
- error in file include/include_db.php on line # 0 : executeQuery
- error in file include/include_db.php on line # 0 : executeQuery
- error in file include/include_db.php on line # 0 : preparedQuery
- error in file products_top.php on line # 48 : getRecord
- error in file products.php on line # 60 : include