Internal error: pcfg_openfile() called with NULL filename

Yeah, so even if you turn off basic authentication and specify a different auth method, Apache (at least some versions of it) still looks around for an auth file and throws a “pcfg_openfile() called with NULL” error when it can’t find one.  To fix, set the user auth file to /dev/null:

AuthBasicAurhorative off
AuthUserFile /dev/null

Or you can just ignore the errror I suppose. It looks more serious than it is.

Resetting rkhunter

Here’s another memory crutch.

# rkhunter --propupd will “update the entire file properties database, or just for the specified entries”. Run after a significant system upgrade or prepare for a few moments of self-inflicted panic a day or two later.