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

So the MySQL server seems to be not running.

It could be using a non-standard socket.

If there is a phpinfo.php file present (http://[domain]/phpinfo.php), it should report the MySQL socket. If one is not present, you can create one.

http://kb.mediatemple.net/questions/...php+page%3F#gs

Restart the mysqld service:

/etc/init.d/mysqld restart

You can also check this thread: http://www.linuxquestions.org/questi...l-sock-281557/