| PsLoggedOn v1.33By Mark RussinovichPublished: December 4, 2006 IntroductionYou can determine who is using resources on your local computer with the "net" command ("net session"), however, there is no built-in way to determine who is using the resources of a remote computer. In addition, NT comes with no tools to see who is logged onto a computer, either locally or remotely. PsLoggedOn is an applet that displays both the locally logged on users and users logged on via resources for either the local computer, or a remote one. If you specify a user name instead of a computer, PsLoggedOn searches the computers in the network neighborhood and tells you if the user is currently logged on. PsLoggedOn's definition of a locally logged on user is one that has their profile loaded into the Registry, so PsLoggedOn determines who is logged on by scanning the keys under the HKEY_USERS key. For each key that has a name that is a user SID (security Identifier), PsLoggedOn looks up the corresponding user name and displays it. To determine who is logged onto a computer via resource shares, PsLoggedOn uses the NetSessionEnum API. Note that PsLoggedOn will show you as logged on via resource share to remote computers that you query because a logon is required for PsLoggedOn to access the Registry of a remote system.
InstallationJust copy PsLoggedOn onto your executable path, and type "psloggedon". PsLoggedOn works on Windows Vista, NT 4.0, Win2K, Windows XP and Server 2003.
Using PsLoggedOnUsage: psloggedon [- ] [-l] [-x] [\\computername | username] | - | Displays the supported options and the units of measurement used for output values. | | -l | Shows only local logons instead of both local and network resource logons. | | -x | Don't show logon times. | | \\computername | Specifies the name of the computer for which to list logon information. | | username | If you specify a user name PsLoggedOn searches the network for computers to which that user is logged on. This is useful if you want to ensure that a particular user is not logged on when you are about to change their user profile configuration. |
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| PsToolsPsLoggedOn is part of a growing kit of Sysinternals command-line tools that aid in the adminstration of local and remote Windows NT/2K systems named PsTools.
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