strange system mail : what does this mean ?



Hi to everyone,

My system (Debian Sarge) was left running all night (usually I shut it down). In the morning, I noticed that a system mail had come :

*************************************
From root@xxxxxxxxxxxxxxxxxxxxx Thu Dec 04 06:25:57 2008
Return-path: <root@xxxxxxxxxxxxxxxxxxxxx>
Envelope-to: root@xxxxxxxxxxxxxxxxxxxxx
Delivery-date: Thu, 04 Dec 2008 06:25:57 +0100
Received: from root by localhost.localdomain with local (Exim 4.50)
id 1L86io-0001bU-Hi
for root@xxxxxxxxxxxxxxxxxxxxx; Thu, 04 Dec 2008 06:25:57 +0100
From: root@xxxxxxxxxxxxxxxxxxxxx (Cron Daemon)
To: root@xxxxxxxxxxxxxxxxxxxxx
Subject: Cron <root@debreil> test -x /usr/sbin/anacron || run-parts --report /et
c/cron.daily
X-Cron-Env: <SHELL=/bin/sh>
X-Cron-Env: <PATH=/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin>
X-Cron-Env: <HOME=/root>
X-Cron-Env: <LOGNAME=root>
Message-Id: <E1L86io-0001bU-Hi@xxxxxxxxxxxxxxxxxxxxx>
Date: Thu, 04 Dec 2008 06:25:57 +0100
Status: RO

/etc/cron.daily/standard:
Files were found in lost+found directories. This is probably
the result of a crash or bad shutdown, or possibly of a disk
problem. These files may contain important information. You
should examine them, and move them out of lost+found or delete
them if they are not important.

The following files were found:


/boot/lost+found:
#171379

************************

There is no possibility that my system may have shutdown : it wouldn't have restarted on its own. Besides, I have an APC system that is supposed to manage power failures, and, it this system had recorded any problem such as temporary power failure or voltage variation, it would have generated a special system mail. So, I wonder what the reason of the above system mail is. I tried to check what was that "#171379" file or whatever, in the /boot/lost+found directory. It appears to be a directory. Any direct trial to get into that directory fails :

/boot/lost+found#cd #171379
/#

So, I had to use the Midnight Commander, and I could see that the directory '#171379' contained 10 files as follows :

device.map 30 19 aug 2007
e2fs_stage1_5 7776 19 aug 2007
fat_stage1_5 7504 19 aug 2007
jfs_stage1_5
menu.lst
menu.lst~
minix_stage1_5
reiserfs~tage1_5
stage1
xfs_stage1_5


Could anyone tell me why have such files ended up in this /boot/lost+found directory ? Could this be the side result of a virus or other unfriendly attempt ?

Does this kind of warning call for any relevant test ?

Thanks in advance for any advice

Bernard


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