> I am not quite sure that I have been hacked. The stupid file is ~ 16M and
> not only one, I found another . Time stamp is some time in 1992 !!!. Use
> by any means can not remove it, even use rm -f or use mc file manager and
> delete it. Can not write to it, but can read (use view in mc). when saw in
> mc window. the size is 0 (press F9 and f then h to access file attribute
> in mc) but in the main window it is 16M; use ls -l the same result
> (16M) Copy it to another file , that is is 16M and of course I can delete
> that file. I once had a hard disk failure, is it the reason? Or have I
> been hacked? Any way I just install a new RedHat 6.0 (clean install) and
> before I make file system with checking badblocks, hope that it wont
> happen again.

Here's another brainstorm...

Have you run fsck?  you might have a corrupted filesystem.  the only other
thing I can think of is if root's UID has been changed.  open up /etc/passwd
and check that root has UID 0 (root:x:0:0:root:/root:/bin/bash).

Kevin



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