Problem solved. I found the configurate file with my database information in it. The database password was not one that I set, but rather some strange mix of numbers and letters–apparent automatically generated. I replaced that password with my password and WordPress came back up with everything intact. Not sure why my password changed. Thanks for your help.
The first of the two links in the previous post is broken. I found two copies of wp-config.php:
/etc/wordpress/wp-config.php
/usr/share/wordpress/wp-config.php
Many of the entries referred to in the second link are entirely missing from my copy of wp-config.php. Here’s my config.php:
<?php
/** WordPress's Debianised default master config file
Please do NOT edit and read about how the configuration works in the README.Debian
**/
require_once('/etc/wordpress/config-'.strtolower($_SERVER['HTTP_HOST']).'.php');
define('ABSPATH', '/usr/share/wordpress/');
require_once(ABSPATH.'wp-settings.php');
?>
Do I have the right file? Why does it tell me not to edit?