MySQL - Error SQL ERROR [ mysql4 ] var/lib/mysql/mysql.sock' (111) [2002]

[lawlsauc]

For some reason, I cannot visit my site, it's really freaking me out.

Whenever I try to visit my site, it says "SQL ERROR [ mysql4 ]

Can't connect to local MySQL server through socket '/var/lib/mysql/mysql.sock' (111) [2002]

An sql error occurred while fetching this page. Please contact an administrator if this problem persists."

Please help, anyone?