An invincible file

[Tyler Aviss]

I've got a file that for some reasons seems semi-invincible. Here's a
quick overview (we'll call the file /opt/data/.config.xml).
a) root # ls -ld .config.xml
-rw-r--r-- 1 root root 4050 Mar 18 08:07 .config.xml

b) root # ls -ld /opt/data
drwxr-xr-x 8 root root 4096 Oct  4 13:43 /opt/data/

c) Unmounted /opt, fsck'ed, and there are no visible FS errors

d) root # lsattr .config.xml
------------- .config.xml

e) root  # mount | grep opt
/dev/sda3 on /opt type ext3 (rw)


The file cannot be renamed or deleted. The contents *can* be edited.
The filesystem isn't readonly, The file isn't undeletable/immutable.
The user is root


Any ideas


- TJA
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