On Mon, Aug 06, 2012 at 05:37:23PM -0400, rabidblog...@safe-mail.net wrote:
> $ lsof | grep anon_inode
> anon_inode
This is anonymous inode, for example, the process open a file on disk
and then unlink it.

After that there isn't a filesystem entry attached to the inode anymore
so the others can't open it. And the process which holds the open file
can operates it until close it.

> 
> $ lsof | grep dev/null
> /dev/null
> 

For /dev/null, note that there are many process open it, mainly used by
daemon. Its stdin, stdout, stderr redirected to /dev/null.

--
Thanks,
Chengwei

> I find several anon_inodes and over a dozen /dev/null listings, in some 
> listings for each there are several processes which are repeated. I'm 
> expecting this to be a rootkit, but none of the rootkit scanners find 
> anything. Why are these two listings appearing for various processes? I'm not 
> running any virtual machines, emulation, shares, printers, servers, etc. but 
> these listings continue to appear, it doesn't matter what Linux distro I use, 
> these continue to show, even when disconnected from the internet.
> 
> What are they?
> Why are they appearing?
> How can I stop these from running? (if they're bad)
> 
> I've searched the web and cannot find anything which explains these to my 
> satisfaction.
> 
> 
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