$ cat tnsnames.ora
# tnsnames.ora Network Configuration File: /home/oracle/oracle/product/10.2.0/db_2/network/admin/tnsnames.ora
# Generated by Oracle configuration tools.

ORCL =
  (DESCRIPTION =
    (ADDRESS = (PROTOCOL = TCP)(HOST = accord.novaglobal.com.sg)(PORT = 1521))
    (CONNECT_DATA =
      (SERVER = DEDICATED)
      (SERVICE_NAME = orcl)
    )
  )

EXTPROC_CONNECTION_DATA =
  (DESCRIPTION =
    (ADDRESS_LIST =
      (ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC1))
    )
    (CONNECT_DATA =
      (SID = orcl)
      (PRESENTATION = RO)
    )
  )












 cat listener.ora
# listener.ora Network Configuration File: /home/oracle/oracle/product/10.2.0/db_2/network/admin/listener.ora
# Generated by Oracle configuration tools.



SID_LIST_LISTENER =
  (SID_LIST =
    (SID_DESC =
      (SID_NAME = orcl)
      (ORACLE_HOME = /home/oracle/oracle/product/10.2.0/db_2)
      (PROGRAM = extproc)
      (ENVS = "LD_LIBRARY_PATH=/home/oracle/DSAccord/lib,
        ACCORD_SYSTEM_6=/home/oracle/DSAccord/system/,
        ACCORD_SETTINGS_6=/home/oracle/DSAccord/accord6.ini,
        EXTPROC_DLLS=libaccora10.so.6:libaccosk10.so.6")
    )
  )


LISTENER =
  (DESCRIPTION_LIST =
    (DESCRIPTION =
      (ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC1))
      (ADDRESS = (PROTOCOL = TCP)(HOST = accord.novaglobal.com.sg)(PORT = 1521))
    )
  )




 cat sqlnet.ora 
# sqlnet.ora Network Configuration File: /home/oracle/oracle/product/10.2.0/db_2/network/admin/sqlnet.ora
# Generated by Oracle configuration tools.

NAMES.DIRECTORY_PATH= (TNSNAMES, EZCONNECT)