How to tell if I've been hacked?

[Kenneth Loafman]

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?

"Vulnerable Linux Kernel", now there's an oxymoron.

There are two programs to suggest, chkrootkit and rkhunter.  They check
for the known rootkits that are out there, of which there are a few that
can hit older or out-of-date kernels.  As to being hacked, almost all of
the hacks involve installing rootkits, so this is the route to go.

...Ken