Warning: Can't connect to local MySQL server through socket '/var/lib/mysql/mysql.sock' (111) in /var/www/linkdump/link_management.inc on line 19

Warning: MySQL Connection Failed: Can't connect to local MySQL server through socket '/var/lib/mysql/mysql.sock' (111) in /var/www/linkdump/link_management.inc on line 19
Error: could not connect to database