Am unable to start the listener, it throws error# TNS-12560 and TNS-00583.

Question

$ lsnrctl start
---------------------------------------------------ERROR MESSAGE----------------------------
LSNRCTL for Linux: Version 10.2.0.1.0 - Production on 25-SEP-2011 00:01:50
Copyright (c) 1991, 2005, Oracle. All rights reserved.
Starting /u01/app/oracle/product/10.2.0/db_1/bin/tnslsnr: please wait...
TNSLSNR for Linux: Version 10.2.0.1.0 - Production
System parameter file is /u01/app/oracle/product/10.2.0/db_1/network/admin/listener.ora
Log messages written to /u01/app/oracle/product/10.2.0/db_1/network/log/listener.log
Error listening on: (DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=localhost.localdomain)(PORT=1521)))
TNS-12560: TNS:protocol adapter error
TNS-00583: Valid node checking: unable to parse configuration parameters
Listener failed to start. See the error message(s) above...
am using two database 1)bullet 2)karthy where bullet db is target and karthy is catalog and my LISTENER ENTRY is
SID_LIST_LISTENER =
(SID_LIST =
(SID_DESC =
(SID_NAME = karthy)
(ORACLE_HOME = /u01/app/oracle/product/10.2.0/db_1)
(global_name = karthy)
(SID_DESC =
(SID_NAME = bullet)
(ORACLE_HOME = /u01/app/oracle/product/10.2.0/db_1)
(global_name = bullet)
my TNS entry is
tns_bull
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST = localhost.localdomain)(port=1521))
(CONNECT_DATA =
(server=dedicated)
(service_name=karthy)
kindly correct me where am gone wrong...

Answer 1

ksk wrote:
OS cmds
$ cat /etc/hosts
# Do not remove the following line, or various programs
# that require network functionality will fail.
127.0.0.1 localhost.localdomain localhost
::1 localhost6.localdomain6 localhost6
Listener is connected so their is no error at that tailexcellent point.
using localhost/127.0.0.1 means that no remote client can ever connect to listener/DB
The upside is that your DB like mine can NEVER be hacked across the *NET!