How to Log In to Drupal (when no login option available on front page)
You may not want a log on option to appear on the front page of your Drupal-powered sight for some reason. For example, if the website is your business brochure, and you don’t want clients or prospects logging in, you may prefer to remove the login option from your front page. This is easy to do by editing the navigation menu.
So how do you, the site administrator, log in?
This is easy when you know how:[siteURL]/?q=user. For example www.yoursite.com/?q=user. Type “?q=user” literally, do not replace “user” with a user name. This will take you to the login page.
For more information, visit the Drupal site. The information above is from an explanation on how to login once you have turned your site off-line for maintenance.