[root@centos6 admin]# lsnrctl status LISTENER

LSNRCTL for Linux: Version 11.2.0.1.0 - Production on 08-MAR-2016 09:01:15

Copyright (c) 1991, 2009, Oracle.  All rights reserved.

Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=IPC)(KEY=EXTPROC1521)))
STATUS of the LISTENER
------------------------
Alias                     LISTENER
Version                   TNSLSNR for Linux: Version 11.2.0.1.0 - Production
Start Date                08-MAR-2016 05:28:19
Uptime                    0 days 3 hr. 32 min. 56 sec
Trace Level               off
Security                  ON: Local OS Authentication
SNMP                      OFF
Listener Parameter File   /u01/app/oracle/product/11.2.0/db_1/network/admin/listener.ora
Listener Log File         /u01/app/oracle/diag/tnslsnr/centos6/listener/alert/log.xml
Listening Endpoints Summary...
  (DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(KEY=EXTPROC1521)))
  (DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=localhost)(PORT=1521)))
Services Summary...
Service "centos6.dbaora.com" has 1 instance(s).
  Instance "centos6", status READY, has 1 handler(s) for this service...
Service "centos6XDB.dbaora.com" has 1 instance(s).
  Instance "centos6", status READY, has 1 handler(s) for this service...
The command completed successfully