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Re: Who is deleting the file



On Fri, 1 Apr 2011, Abhilash abhi wrote:

Thanks to all especially to Jonathan for the suport.

But we are using SLES10 OS and selinux feature is not there. therefore
auditctl method wont work even if the service auditd is running.

Also in this case audit feature should be enabled in the Netapp filer right
? not from the machine from which we are accessing the NFS path from those
filer.


Do you have process accounting installed? With that you can use the "lastcomm" command to see who's running what command. On RHEL that's
the "psacct" package.  Can't help you with SLES.

Carl
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IT Manager
Department of Biostatistics
Box 357232                      voice:     206-616-2725
University of Washington        fax:       206-543-3286
Seattle, WA  98195-7232         internet:  cgr u washington edu


On Fri, Apr 1, 2011 at 12:15 AM, Jonathan S Billings <jsbillin umich edu>wrote:

On 03/31/2011 08:55 AM, Abhilash abhi wrote:
I have one directory which contains some files..and the directory is
owned
by some group called X. All files within the directory have group
membership
X since SGID is set .some files are frequently missing from that
directory
and i am restoring it through snapshots(Netapp filer). Is there anyway to
find out who is (which user) or by what operation deleted the file??

This can be fairly easily done with SELinux.

First, make sure selinux is enabled and auditd is running.  Then, start
monitoring the directory with 'auditctl'.  Example, assuming the
directory is /tmp/testing (this starts auditing writes to the directory,
and labels it with the key "whodeletedit"):

# auditctl -w /tmp/testing -k whodeletedit -p w

when you're done monitoring it, you can remove this search with:

# auditctl -W /tmp/testing -k whodeletedit -p w

You will want to stop monitoring it once you've figured it out, because
it'll continue to fill the audit log for every time someone adds or
removes a file from the directory.

If you want to see who deleted files with /bin/rm in that directory, run:
# ausearch -i -k whodeletedit -x /bin/rm

This will print out the audit log for every /bin/rm in called that
writes to the directory.  I added the -i to ausearch so it'll print out
the username instead of the userid.  You can get rid of the -x /bin/rm
if no one is running /bin/rm but using some other program that unlinks
files.


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Jonathan Billings <jsbillin umich edu>
College of Engineering - CAEN - Unix and Linux Support

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Regards,
Abhilash
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