2.原本的首页的字典玩笑和7.10升级指南界面消失，出现want to help ubuntu的界面
Unable to connect to database server
This either means that the username and password information in your settings.php file is incorrect or we can't contact the MySQL database server. This could mean your hosting provider's database server is down.
The MySQL error was: Too many connections.
Currently, the username is drupal and the database server is localhost.
* Are you sure you have the correct username and password?
* Are you sure that you have typed the correct hostname?
* Are you sure that the database server is running?
For more help, see the Installation and upgrading handbook. If you are unsure what these terms mean you should probably contact your hosting provider.