I have an oracleDB working en production for more than a year. I have my listener working but NO listener.ora file.
[oracle@base admin]$ lsnrctl status
LSNRCTL for Linux: Version 11.2.0.4.0
Connecting to (ADDRESS=(PROTOCOL=tcp)(HOST=)(PORT=1521))
STATUS of the LISTENER
------------------------
Alias LISTENER
Version TNSLSNR for Linux: Version 11.2.0.4.0 - Production
Start Date 02-NOV-2016 14:22:38
Uptime 1 days 20 hr. 3 min. 13 sec
Trace Level off
Security ON: Local OS Authentication
SNMP OFF
Listener Log File /o/app/oracle/diag/tnslsnr/base/listener/alert/log.xml
Listening Endpoints Summary...
(DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=base)(PORT=1521)))
Services Summary...
Service "BASE" has 1 instance(s).
Instance "BASE", status READY, has 1 handler(s) for this service...
Service "BASEXDB" has 1 instance(s).
Instance "BASE", status READY, has 1 handler(s) for this service...
The command completed successfully
But i have no listener.ora
$ ls /o/app/oracle/product/DB_11.2_SE/dbhome_2/network/admin/
samples shrept.lst tnsnames.ora
This is the content of my tnsnames.ora
$ cat tnsnames.ora
BASE =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST = 10.20.20.19)(PORT = 1521))
(LOAD_BALANCE = yes)
)
(CONNECT_DATA =
(SERVICE_NAME = BASE)
)
)
ORCL =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = TCP)(HOST = 10.20.20.20)(PORT = 1522))
(CONNECT_DATA =
(SERVER = DEDICATED)
(SERVICE_NAME = orcl)
)
)
How is this possible? As far as I know, for the listener to work, I have to have listener.ora file.