Currently Active User (WHO Command)

The WHO command is used to display information about users currently logged into the mainframe system. It helps administrators and operators monitor active sessions.

It provides a clear overview of your user ID, TSO logon procedure name, terminal ID, group index, group name of the authorization group you have been assigned to, MVS z/OS version, SDSF version, ISPF version, JES name, SYSPLEX and many more information.

Enter the WHO command in SDSF tabular panel.

Hit Enter to clear the WHO information shown.