On 12/22/2012 10:42 AM, support-request@drupal.org wrote:

I simply use the command in my shell (cp -r /var/www/drupal ~/DATA) and backed up databse using mysqldump

now after reinstalling my OS I just copied my drupl site to same place in /var/www and I set chown www-data:www-data /var/www/drupal/sites/default/setting.php chown www-data:www-data /var/www/drupal/sites/default/files

and restored mysql database properly with same name. setting.php is correct

but when I am openinghttp://localhost/drupal its showing blank page please tell me where I am wrong? and what went wrong? is it happening because of chache and clean url?

You need to copy the database settings from settings.php into a text file, go into /settings.php and delete the database settings, line 203, next 15 lines. do an install by copy and pasting the user name and password into the "new install" from the text file. Go through the install process and it will find the database and the site should run as normal Also check that your files have the correct ownerships. Roger