OID to find the login user name of the computer

[palavesamuthu Ram]

Hi all,
I am using SNMP to monitor the network devices, using SNMP4J.
I can list the host name, its system description but How can I get the login user name??
Is there any OID available for that or how can I get that??

[Ivan Jozsef Balazs]

Does this question make sense?

Has every network device a (single) user login name?

Are a multi-user Linux box or a smart phone or a windows box running only services or a router network devices?
What is their "login user name"?

[palavesamuthu Ram]

Hi.. Thanks for your comment...
My doubt is, If a computer in the network may have more than one account(admin, guest, other users).
Is it possible to find which account is logged in..??
I can get the details such as running services of the device, how long the machine was running.. etc..
I want to know is it possible or not...

[Ivan Jozsef Balazs]

Suppose I log in into a Linux box with a given userid, and then make a

su command

(substitute user) to another user. Who is logged in then?

If a deamon ("service" in windows-parlance) is running, such a Postgres server as a dedicated Postgres user, is this user logged in?

Do logins through traditional (non-network) terminals count?

It is a problematic question without regard to SNMP.

[palavesamuthu Ram]

I have no idea about Linux...
I am a complete newbie to this, anyway thanks a lot.

[Ivan Jozsef Balazs]

palavesamuthu Ram wrote:
If a computer in the network may have more than one account(admin, guest, other users).
Is it possible to find which account is logged in..??

On Unix (including) Linux several users can be logged in at the same time and even though we usually think of a Windows box as a single-user one, it is conceivable to have several concurrent remote desktop sessions:

Enable Concurrent Remote Desktop Sessions in Windows with This Patch

My point is that this question is inherently vague: not every network device is a single-user Windows box...

[palavesamuthu Ram]

not every network device is a single-user Windows box

yes, because this only this question came..
If a machine is single user one, then why should we find the log in name..

[Ivan Jozsef Balazs]

Ordinary Windows OS'es let you define several users but only one can be active at a time. It is possible though to change the user, let the previous session alone, and to log in as different user. Then only the last one will be active but the other user sessions will lurk around. Instead if logging out, you can change to another user, and your previous session (open windows etc.) will remain conserved until you return.

[palavesamuthu Ram]

Thanks again, your comments are really helpful....