Why, that's a great idea ;)
Especially the logfile, because if a user doesn't have a MTA setup, he'll never know the output of rkhunter...
I'll take care of this either some time today or first thing in the morning.
Ok, since I'm at least 10x more knowledgable wrt scripting than I was when I
first wrote that cron job, I decided to rewrite it ;p
In addition to the stuff you have requested, I decided to add a couple other
features (and even went as far as patching rkhunter's --createlogfile to accept
an optional filename argument for specifying an alternate log file location).
I also added a SAVE_OLD_LOGS config option, so that old logs dont get
overwritten every time rkhunter runs. I've also added a LOGFILE_PERMS option,
in case the user would like different permissions (it's world readable by
default).
rkhunter-1.1.8-r1 is in CVS. Please test (mainly the cron script) if you could
be so kind, and reopen this bug, if necessary.
Thanks for request; in addition to motivating me to provide a more enhanced
cron script, you also gave me something to do at work last night ;)
Cheers.