Cpanel is most popular control panel for Linux servers.
I used to support many distros. Recently they changed policy to only support CentOS and RHEL Linx distros. They also support FreeBSD, but recommended only for expert users.
http://www.cpanel.net/products/cpwhm/cpanel11/sys_requirements.htm
It is a good move as it make them easy to prodie support and make cpanel work better on these [...]