[CentOS] How to tell if I've been hacked?

On 08/19/2009 02:53 AM, Scott Ehrlich wrote:
> There is a lot of talk about the vulnerable Linux kernel.   I'm simply
> wondering the telltale signs if a given system has been hacked?
> What, specifically, does a person look for?

there have been some really good ideas that came through this 
conversation, would someone like to take ownership of a wiki page that 
puts all this together, into the Security section perhaps ?

-- 
Karanbir Singh : http://www.karan.org/  : 2522219 at icq