Cause: Control program usage
message.
Action: None.

Relared Errors:
TNS-01020:
STATUS of the LISTENER
TNS-01021:
————————
TNS-01022:
Alias string
TNS-01023:
Version string
TNS-01024:
Trace Level string
TNS-01025:
Security string
TNS-01026:
Start Date string
TNS-01027:
Listener Trace File string
TNS-01028:
Listener Log File string
TNS-01029:
Services Summary…