I noticed a number of directories on my home server that I haven't touched in have had their modification time changed, though none of the files contained in these directories report a change in time.
I run an IDS (fcheck), and it did not report anything on the date of the directories' modification time. This is not surprising since the directories in question are in my home directory (which my IDS does not scan). I have grepped through auth.log and did not find any unauthorized access on the date in question and checked most configurations in /etc appear to be the same. How should I proceed next to determine if in fact my machine has been compromised?