Drupal site and how to manually put it offline

Tue, 09/18/2012

Go to phpmyadmin and start this 2 commands

put site offline
UPDATE variable SET value='s:1:"1"' WHERE name = 'site_offline'
put site online
UPDATE variable SET value='s:1:"0"' WHERE name = 'site_offline

depending what you need, if you have drush you could also do that with drush.