[CentOS] Back up system

Wed Oct 19 13:43:26 UTC 2011
Damas Ally <damastz at gmail.com>

I have centos 5.7 (server). I need to configure it for backup system, that
means it have to back up or back up documents shall be posted or send to
this server from various users (clients using windows machine and ubuntu).
Can someone help me with instructions on how i can make this possible? And
/or is it possible to set active directory on this machine and if possible
Please help, i am not good enough on centos.

"If opportunity doesn't knock, build a door".
                        Makweba Sir