I just took at look at webmin which has always seemed to me to do a good job of guessing the OS. It appears that that webmin looks at /etc/.issue or /etc/issue, and the result of "uname -a". In /usr/share/webmin take a look at oschooser.pl and os_list.txt. Webmin has been removed from Debian but you can download it from http://www.webmin.com/ --Mike Bird