While installing SugarCRM 4.5 on Fedora 4 or higher version, there are few requirements that are required. The main issues that came in focus were the php-mysql configuration. In the earlier versions of Fedora Core there were no issues like this but now we have to update the php-mysql to be configured.

I tried to change the php.ini file, too but the application was not able to locate the database though MySQL was present there. For that I upgraded the php-mysql module. You can download the rpm file from here.