oracle@bcm-laptop:~$ lsnrctl status

LSNRCTL for Linux: Version 11.2.0.1.0 - Production on 02-JUN-2012 11:15:37

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

Connecting to (ADDRESS=(PROTOCOL=tcp)(HOST=)(PORT=1521))
STATUS of the LISTENER
------------------------
Alias                     LISTENER
Version                   TNSLSNR for Linux: Version 11.2.0.1.0 - Production
Start Date                02-JUN-2012 11:15:10
Uptime                    0 days 0 hr. 0 min. 27 sec
Trace Level               off
Security                  ON: Local OS Authentication
SNMP                      OFF
Listener Log File         /u01/app/oracle/product/11.2.0/dbhome_1/log/diag/tnslsnr/bcm-laptop/listener/alert/log.xml
Listening Endpoints Summary...
  (DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=localhost)(PORT=1521)))
Services Summary...
Service "v112" has 1 instance(s).
  Instance "v112", status READY, has 1 handler(s) for this service...
Service "v112XDB" has 1 instance(s).
  Instance "v112", status READY, has 1 handler(s) for this service...
The command completed successfully
oracle@bcm-laptop:~$ lsnrctl stop

LSNRCTL for Linux: Version 11.2.0.1.0 - Production on 02-JUN-2012 11:15:44

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

Connecting to (ADDRESS=(PROTOCOL=tcp)(HOST=)(PORT=1521))
The command completed successfully
oracle@bcm-laptop:~$ sqlplus scott/tiger

SQL*Plus: Release 11.2.0.1.0 Production on Sat Jun 2 11:15:55 2012

Copyright (c) 1982, 2009, Oracle.  All rights reserved.


Connected to:
Oracle Database 11g Enterprise Edition Release 11.2.0.1.0 - 64bit Production
With the Partitioning, OLAP, Data Mining and Real Application Testing options

11:15:56 SQL>