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Full Discussion: Ghost Users
Operating Systems AIX Ghost Users Post 61740 by guest100 on Tuesday 8th of February 2005 05:53:35 AM
Old 02-08-2005
The answer to your questions is:

Some threads from applications used by the user are kept open even after the user logs off. Some of them have a default auto kill time set and some are not. That varies from OS to OS.
Also, if the user used console, or other x-terms that means that various tty's connections established. UNIX works with proccesses, threads, sessions, tty's.
With the "ps" command you can only see the top level procces.

Also, do a 'netstat -a'

it can help you realise how UDP and sockets are mixed with all the above.

Cheers

Aris :-)
 

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LAST(1) 						    BSD General Commands Manual 						   LAST(1)

NAME
last -- indicate last logins of users and ttys SYNOPSIS
last [-n] [-h host] [-t tty] [user ...] DESCRIPTION
Last will list the sessions of specified users, ttys, and hosts, in reverse time order. Each line of output contains the user name, the tty from which the session was conducted, any hostname, the start and stop times for the session, and the duration of the session. If the ses- sion is still continuing or was cut short by a crash or shutdown, last will so indicate. -n Limits the report to n lines. -h host Host names may be names or internet numbers. -t tty Specify the tty. Tty names may be given fully or abbreviated, for example, ``last -t 03'' is equivalent to ``last -t tty03''. If multiple arguments are given, the information which applies to any of the arguments is printed, e.g., ``last root -t console'' would list all of ``root's'' sessions as well as all sessions on the console terminal. If no users, hostnames or terminals are specified, last prints a record of all logins and logouts. The pseudo-user reboot logs in at reboots of the system, thus ``last reboot'' will give an indication of mean time between reboot. If last is interrupted, it indicates to what date the search has progressed. If interrupted with a quit signal last indicates how far the search has progressed and then continues. SEE ALSO
lastcomm(1), utmpx(5), ac(8) HISTORY
Last appeared in 3.0BSD. 4th Berkeley Distribution June 6, 1993 4th Berkeley Distribution
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