error: ORA-01034:oracle not available ORA-27101:shared memory realm does not exist(一)

Used TNSNAMES adapter to resolve the alias
Attempting to contact (DESCRIPTION = (ADDRESS = (PROTOCOL = TCP)(HOST =192.168.0.188)(PORT = 1521)) (CONNECT_DATA = (SERVER = DEDICATED) (SERVICE_NAME = orcl)))
OK (0 msec)
[oracle@localhost admin]$ lsnrctl

LSNRCTL for Linux: Version 11.2.0.1.0 - Production on 08-MAR-2013 09:25:32

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

Welcome to LSNRCTL, type "help" for information.

LSNRCTL> status
Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=192.168.0.188)(PORT=1521)))
STATUS of the LISTENER
------------------------
Alias LISTENER
Version TNSLSNR for Linux: Version 11.2.0.1.0 - Production
Start Date 08-MAR-2013 09:05:43
Uptime 0 days 0 hr. 19 min. 51 sec
Trace Level off
Security ON: Local OS Authentication
SNMP OFF
Listener Parameter File /u01/app/oracle/product/11.2.0/dbhome_1/network/admin/listener.ora
Listener Log File /u01/app/oracle/diag/tnslsnr/localhost/listener/alert/log.xml
Listening Endpoints Summary...
(DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=192.168.0.188)(PORT=1521)))
(DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(KEY=EXTPROC0)))
Services Summary...
Service "ORCL" has 1 instance(s).
Instance "ORCL", status UNKNOWN, has 1 handler(s) for this service...
Service "PLSExtProc" has 1 instance(s).
Instance "PLSExtProc", status UNKNOWN, has 1 handler(s) for this service...
The command completed successfully
LSNRCTL> exit
[oracle@localhost admin]$ sqlplus /nolog

SQL*Plus: Release 11.2.0.1.0 Production on Fri Mar 8 09:25:49 2013

Copyright (c) 1982, 2009, Oracle. All rights reserved.

SQL> connect sys@orcl as sysdba
Enter password:
ERROR:
ORA-01031: insufficient privileges

SQL> connect / as sysdba
Connected.
SQL> select status from v$instance;

STATUS
------------
OPEN

SQL> connect hwdosconplid/pokiujuwdxawsz@orcl
ERROR:
ORA-01034: ORACLE not available
ORA-27101: shared memory realm does not exist

SQL> exit
[oracle@localhost admin]$ cat listener.ora
# listener.ora Network Configuration File: /u01/app/oracle/product/11.2.0/dbhome_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/11.2.0/dbhome_1)
(PROGRAM = extproc)
)
(SID_DESC =
(GLOBAL_DBNAME = ORCL)
(ORACLE_HOME = /u01/app/oracle/product/11.2.0/dbhome_1)
(SID_NAME = ORCL)
)
)
LISTENER =
(DESCRIPTION_LIST =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.0.188)(PORT = 1521))
(ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC0))
)
)
SUBSCRIBE_FOR_NODE_DOWN_EVENT_LISTENER=OFF



同时看到监听日志中有如下记录：

***********************************************************************
Fatal NI connect error 12541, connecting to:
(DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=localhost)(PORT=1521))(CONNECT_DATA=(SID=orcl)(CID=(PROGRAM=emagent)(HOST=localhost.localdomain)(USER=oracle))))

VERSION INFORMATION:
TNS for Linux: Version 11.2.0.1.0 - Production
TCP/IP NT Protocol Adapter for Linux: Version 11.2.0.1.0 - Production
Time: 07-MAR-2013 18:01:20
Tracing not turned on.
Tns error struct:
ns main err code: 12541
TNS-12541: TNS:no listener
ns secondary err code: 12560
nt main err code: 511
TNS-00511: No listener
nt secondary err code: 111





[oracle@localhost admin]$ cat sqlnet.ora