Server OS
 

Hi
I'm new here and looking for the best Server OS for my company. I have Fadora Core 2, but should i use this as server software?

Fedora core 2??? Good god no. It's very very obsolete, utterly unsupported and NOT a server grade operating system. Based on just about zero information, if you want it for free, use CentOS 6.2, if you want commercial support, use Redhat EL 6.2.

Based on the type of your question I assume that you have not much knowledge about Linux. If this is your companies server (means a system critical for your work) I would recommend to choose an OS with professional support.