Still celebrating National IT Professionals Day with 3 months of free Premium Membership. Use Code ITDAY17

x
?
Solved

How do I determine who last accessed a file and when in a unix environment?

Posted on 2014-04-16
6
Medium Priority
?
599 Views
Last Modified: 2016-02-13
We are moving to a new SAS environment and need to restrict file access in the new environment.  We would like to be able to determine file security based on the last time someone has accessed a file/dataset.  The command ls -atime will provide us with the last access time.  However, it does not provide us with WHO last accessed the file.   At this point, we are surveying all our users which is not practical since we have a significant number of users and files.  

Any help would be appreciated!
0
Comment
Question by:tammymorse
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
6 Comments
 
LVL 47

Expert Comment

by:David
ID: 40004085
You can't.  The file system only has timestamps relating to last access, not user information. If you want to do this, then you'll need to install some software that monitors such things at the kernel level.

That software is O/S and filesystem dependent, and sometimes it is not free.
0
 
LVL 47

Expert Comment

by:David
ID: 40004096
How about setting up some sort of mandatory script that people must use to access a data set.  Maybe encrypt the dataset so they don't know the password, so the only way to get to it is to run a script that logs the action as a precursor to unlocking it with a hidden password they can't see that is stored in the host computer in a place they can't read)

(I have no idea if  SAS will allow this, just trying to tell you that you'll have to think outside the box to limit access, rather than log access).
0
 
LVL 38

Assisted Solution

by:Gerwin Jansen, EE MVE
Gerwin Jansen, EE MVE earned 1000 total points
ID: 40004409
Can you share how your environment is setup?

Do you have users, groups and folders per deparment / project / team or some sort of folder structure? Any security setup to prevent unauthorized users from accessing certain folders?

You could start by setting up new folders on the SAS environment and assign 'owners' for each folder that are allowed to grant access to other users for that particular folder.
0
Introducing the WatchGuard 420 Access Point

WatchGuard's newest access point includes an 802.11ac Wave 2 chipset, providing the fastest speeds for VoIP, video and music streaming, and large data file transfers. Additionally, enjoy the benefits of strong security as the 3rd radio delivers dedicated WIPS protection!

 

Author Comment

by:tammymorse
ID: 40004483
It appears I have to think outside the box.
0
 
LVL 30

Accepted Solution

by:
serialband earned 1000 total points
ID: 40004874
You can install auditting.  If you have a redhat linux variant:

yum install audit
chkconfig auditd on

auditctl -w /PATH/TO/FILE -k KEY


from http://www.cyberciti.biz/tips/linux-audit-files-to-see-who-made-changes-to-a-file.html

Suse has examples too: https://www.suse.com/documentation/sled11/singlehtml/audit_quickstart/audit_quickstart.html

Debian, Ubuntu, Mint: http://xmodulo.com/2013/05/how-to-monitor-file-access-on-linux.html
0
 
LVL 5

Expert Comment

by:John Pope
ID: 40006172
What's your OS tammymorse?

It's relatively straight forward on AIX.  

I can help with that if you're still needing it.

Cheers, JP.
0

Featured Post

Moving data to the cloud? Find out if you’re ready

Before moving to the cloud, it is important to carefully define your db needs, plan for the migration & understand prod. environment. This wp explains how to define what you need from a cloud provider, plan for the migration & what putting a cloud solution into practice entails.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

The recent Petya-like ransomware attack served a big blow to hundreds of banks, corporations and government offices The Acronis blog takes a closer look at this damaging worm to see what’s behind it – and offers up tips on how you can safeguard your…
Check out what's been happening in the Experts Exchange community.
Sending a Secure fax is easy with eFax Corporate (http://www.enterprise.efax.com). First, just open a new email message. In the To field, type your recipient's fax number @efaxsend.com. You can even send a secure international fax — just include t…
How to Install VMware Tools in Red Hat Enterprise Linux 6.4 (RHEL 6.4) Step-by-Step Tutorial

722 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question