[Koha] My Koha is down .. Software error?

[Hartman, David W. - GBTS Library]

No, we are not using apache server and Koha was working on Friday .. it has suddenly stopped (broke over the weekend).  No system changes were made.

From: Bernardo Gonzalez Kriegel [mailto:bgkriegel at gmail.com]
Sent: Tuesday, September 04, 2012 9:42 AM
To: Hartman, David W. - GBTS Library
Cc: koha at lists.katipo.co.nz
Subject: Re: [Koha] My Koha is down .. Software error?

Software error:

Access denied for user 'www-data'@'localhost' (using password: NO) at /usr/share/koha/lib/C4/Context.pm line 758.
Are you using the apache user "www-data" to access Koha's database?
I think that is good practice to use a different database user for koha,
as well a system user to own all the files.

Bernardo