The following command can be used to perform this check:
[oracle@dw ~]$ lsnrctl status
LSNRCTL for Linux: Version 11.1.0.5.0 - Beta on 08-AUG-2007 19:58:40
Copyright (c) 1991, 2007, Oracle. All rights reserved.
Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=dw)(PORT=1521)))
STATUS of the LISTENER
------------------------
Alias LISTENER
Version TNSLSNR for Linux: Version 11.1.0.5.0 ??“ Beta
Start Date 02-AUG-2007 19:06:23
Uptime 6 days 0 hr. 52 min. 17 sec
Trace Level off
Security ON: Local OS Authentication
SNMP OFF
Listener Parameter File
/u01/app/oracle/product/11.1.0/db_1/network/admin/listener.ora
Listener Log File
/u01/app/oracle/diag/tnslsnr/dw/listener/alert/log.xml
528 Oracle Database 11g DBA Handbook
Listening Endpoints Summary...
(DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=dw)(PORT=1521)))
Services Summary...
Service "+ASM" has 1 instance(s).
Instance "+ASM", status READY, has 1 handler(s) for this service...
Service "+ASM_XPT" has 1 instance(s).
Instance "+ASM", status READY, has 1 handler(s) for this service...
Service "dw.world" has 1 instance(s).
Instance "dw", status READY, has 1 handler(s) for this service...
Service "dwXDB.world" has 1 instance(s).
Instance "dw", status READY, has 1 handler(s) for this service...
Service "dw_XPT.world" has 1 instance(s).
Instance "dw", status READY, has 1 handler(s) for this service...
The command completed successfully
[oracle@dw ~]$
If the listener is named anything other than LISTENER in the listener.
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