Debes definir la base de datos y la dirección a la que te quieres conectar.<br />
<b>Notice</b>:  Undefined index: clave in <b>/var/www/practisis.net/public/prometeo/web/templateDomicilio/config.php</b> on line <b>100</b><br />
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<b>Notice</b>:  Undefined index: direccion in <b>/var/www/practisis.net/public/prometeo/web/templateDomicilio/class/posprivate.db.php</b> on line <b>53</b><br />
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<b>Fatal error</b>:  Uncaught exception 'PDOException' with message 'SQLSTATE[08006] [7] could not translate host name &quot;dbname=emp&quot; to address: Name or service not known' in /var/www/practisis.net/public/prometeo/web/templateDomicilio/class/posprivate.db.php:56
Stack trace:
#0 /var/www/practisis.net/public/prometeo/web/templateDomicilio/class/posprivate.db.php(56): PDO-&gt;__construct('pgsql: host=; d...', 'practisis3', 'Zuleta99@251!')
#1 /var/www/practisis.net/public/prometeo/web/templateDomicilio/config.php(153): DBConn-&gt;__construct('emp')
#2 /var/www/practisis.net/public/prometeo/web/templateDomicilio/detalleMenu.php(9): include_once('/var/www/practi...')
#3 {main}
  thrown in <b>/var/www/practisis.net/public/prometeo/web/templateDomicilio/class/posprivate.db.php</b> on line <b>56</b><br />