Routinely running chkrootkit yesterday, I noted a warning to the effect that root's bash .history file was found to be zero-length. Since I'm about as sure as I can be that I didn't do that myself, I'm wondering if this means that the system has been cracked. Are there other tests I can run to double-check, somehow?
Thanks in advance,
P.S. I didn't find other threads about this in LQ.