I had some issues about installation and uninstalation of ispconfig 3 stable, and I'm using centos 7. First of all, I think I found some kind of bug. I tried uninstall, after an unsuccessful installation, using uninstall.php and uninstall-fedora.php, but both report an error, can't find the file /usr/local/ispconfig/server/lib/config.inc.php, because the installation didn't create it and doesn't exist, but there are other configurations like database and apache (httpd) exist and they are messing up the start up of apache. The point is, I have some configuration but not everything, it can be called corrupted configuration. I can't uninstall because is missing files. So is missing something in middle, something I'll call purge. So maybe is good to have a purge.php, it tries to clean the default configuration and why not ask to the user for some configuration filled up. For now, I'm trying to clean much as possible and do another installation hopping have a successful work. If not, I'll back to this post to have more help with community.