Do you mean a domain controller? If so you would use SAMBA.
Here is an article on that http://www.freeos.com/articles/3842/
Samba is usually included with Linux Server Distributions.
When I see "domain server" if think of web servers and in that case all you need is Apache Web Server which is usually part of all linux distributions (at least the server distros).
What is a domain server in linux?
Linear Mode
