IO Error Establishing connection network card couldn't

I get now 12514 error please read the bottom of the page if you want to help please


Hello
I downloaded developer sql 3.1.07 and jdk 7u4 I am running oracle 10g on red hat linux
The sql plus works fine, but when I tried to connect with the sql developer software, it gave me an error saying


Status: Failed - Test has failed: IO exception: the network adapter could not establish the connection

I tried to ping the local host, it was fine
but when I tried to ping

tnsping localhost <-no listner
tnsping orcl <-no listner

I got over errors

How should I approach the problem please help me I am new to oracle




*********************************************************************
One solution says you must copy everything listener.ora but that it did not work I I do things

SID-> PLSExtProc
Home-> localhost.localdomain

**********************************************************************

listener.ora # Network Configuration file: /u01/app/oracle/product/10.2.0/db_1/network/admin/listener.ora
# Generated by Oracle configuration tools.

SID_LIST_LISTENER =
(SID_LIST =
(SID_DESC =
(SID_NAME = PLSExtProc)
(ORACLE_HOME = u01/app/oracle/product/10.2.0/db_1)
(= Extproc PROGRAM)
)
)

LISTENER =
(DESCRIPTION_LIST =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = CIP)(KEY = EXTPROC1))
(ADDRESS = (PROTOCOL = TCP)(HOST = localhost.localdomain) (PORT = 1521))
)
)

Edited by: 891355 May 17, 2012 06:47

Published by: Claude on May 19, 2012 11:28

If the two databases and listner use you should be able to connect through sql developer, specifying localhost, 1521 and orcl in connection properties.

You can configure the listener and the database to run at startup. It is well documented in books and on the web. Try Googling "autostart oracle database linux" and "autostart linux listener."

Tags: Database

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