Problems to restore my site

Hello everyone. I had a Debian OS server, that server had my wordpress site. Two days ago I had some problems with the hard drive and decided to reinstall everything, with a difference this time was gonna be CentOS. I have a complete backup of the site (/ var / www / mysite /) and another with all dbs (mysql .. … infor. wordpress).

I can successfully restore the sql database, and files (www). But when I try to access the site it redirects me to the installation (wp-admin/install.php).

What I can try?

Wp-config file is properly configured ¬ ¬

PD: sorry for my little english