lsnrctl

my listener not starting

this is /etc/host file


# Do not remove the following line, or various programs
# that require network functionality will fail.
127.0.0.1 localdomain
192.168.1.12 mac.localdomain mac
192.168.1.16 wtu.localdomain wtu

wtu is another machine...
which we can ping from mac machine..

my tnsnames.ora of mac is this



# tnsnames.ora Network Configuration File: /u01/app/oracle/product/11.2.0/db_1/network/admin/tnsnames.ora
# Generated by Oracle configuration tool
SBI =
  (DESCRIPTION =
    (ADDRESS = (PROTOCOL = TCP)(HOST = mac.localdomain)(PORT = 1521))
    (ADDRESS = (PROTOCOL = TCP)(HOST =localhost)(PORT = 1521))
    (CONNECT_DATA =
      (SERVER = DEDICATED)
      (SERVICE_NAME =sbi)
 )
)

LISTENER_SBI =
(ADDRESS_LIST =
   (ADDRESS = (PROTOCOL= TCP) (HOST = mac.localdomain)(PORT = 1521))
   (ADDRESS = (PROTOCOL= TCP) (HOST = localhost)(PORT = 1521))
)

ORCL =
  (DESCRIPTION =
    (ADDRESS = (PROTOCOL = TCP)(HOST = mac.localdomain)(PORT = 1521))
    (ADDRESS = (PROTOCOL = TCP)(HOST =localhost)(PORT = 1521))
    (CONNECT_DATA =
      (SERVER = DEDICATED)
      (SERVICE_NAME =orcl)
 )
)

LISTENER_ORCL =
(ADDRESS_LIST =
   (ADDRESS = (PROTOCOL= TCP)(HOST = wtu.localdomain)(PORT = 1521))
   (ADDRESS = (PROTOCOL= TCP)(HOST = localhost)(PORT = 1521))
)


my lister.ora

# listener.ora Network Configuration File: /u01/app/oracle/product/11.2.0/db_1/network/admin/listener.ora
# Generated by Oracle configuration tools.

LISTENER1 =
  (DESCRIPTION_LIST =
    (DESCRIPTION =
      (ADDRESS = (PROTOCOL = TCP)(HOST = orcl.localdomain)(PORT = 1521))
    )
  )

ADR_BASE_LISTENER1 = /u01/app/oracle

LISTENER =
  (DESCRIPTION_LIST =
    (DESCRIPTION =
      (ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC1521))
      (ADDRESS = (PROTOCOL = TCP)(HOST = orcl.localdomain)(PORT = 1521))
    )    
  )      
         
ADR_BASE_LISTENER = /u01/app/oracle
       
~                                                                                                                            
~                                                                                                                            
~                                                                                                                            
~                                                                                                                            
~                                                                                                                            
~                                                                                                                            
~                                                                                                                            
~                              


why my lsnrctl is like this...

[oracle@mac admin]$ lsnrctl status

LSNRCTL for Linux: Version 11.2.0.1.0 - Production on 15-SEP-2012 12:43:27

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

Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=IPC)(KEY=EXTPROC1521)))
TNS-12541: TNS:no listener
 TNS-12560: TNS:protocol adapter error
  TNS-00511: No listener
   Linux Error: 2: No such file or directory
Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=orcl.localdomain)(PORT=1521)))
TNS-12545: Connect failed because target host or object does not exist
 TNS-12560: TNS:protocol adapter error
  TNS-00515: Connect failed because target host or object does not exist
   Linux Error: 111: Connection refused
[oracle@mac admin]$