[oracle@localhost ~]$ lsnrctl start
LSNRCTL for Linux: Version 11.2.0.1.0 - Production on 06-AUG-2014 20:02:16
Copyright (c) 1991, 2009, Oracle.? All rights reserved.
Starting /opt/oracle/11g/bin/tnslsnr: please wait...
TNS-12537: TNS:connection closed
?TNS-12560: TNS:protocol adapter error
? TNS-00507: Connection closed
? Linux Error: 29: Illegal seek
这样一般是主机名不对，观察监听状态，监听主机名为 localhost:
[oracle@localhost ~]$ lsnrctl status
LSNRCTL for Linux: Version 11.2.0.1.0 - Production on 06-AUG-2014 20:02:48
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: 111: Connection refused
Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=localhost)(PORT=1521)))
TNS-12541: TNS:no listener
?TNS-12560: TNS:protocol adapter error
? TNS-00511: No listener
? Linux Error: 111: Connection refused
查看主机名，发现/etc/hosts内localhost只想多个地址，引发监听冲突
[root@localhost ~]# cat /etc/hosts
127.0.0.1? localhost.domain localhost
10.4.40.70? localhost
修改主机名：
1 hostname
hostname oracle
2 /etc/hosts
127.0.0.1 localhost localhost.domain
192.168.0.1 oracle
3 /etc/sysconfig/network
hostname = oracle
再次启动,成功
[oracle@oracle ~]$ lsnrctl start
LSNRCTL for Linux: Version 11.2.0.1.0 - Production on 06-AUG-2014 20:07:41
Copyright (c) 1991, 2009, Oracle.? All rights reserved.
Starting /opt/oracle/11g/bin/tnslsnr: please wait...
TNSLSNR for Linux: Version 11.2.0.1.0 - Production
System parameter file is /opt/oracle/11g/network/admin/listener.ora
Log messages written to /opt/oracle/diag/tnslsnr/oracle/listener/alert/log.xml
Listening on: (DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(KEY=EXTPROC1521)))
Listening on: (DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=127.0.0.1)(PORT=1521)))
Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=IPC)(KEY=EXTPROC1521)))
STATUS of the LISTENER
------------------------
Alias? ? ? ? ? ? ? ? ? ? LISTENER
Version? ? ? ? ? ? ? ? ? TNSLSNR for Linux: Version 11.2.0.1.0 - Production
Start Date? ? ? ? ? ? ? ? 06-AUG-2014 20:07:43
Uptime? ? ? ? ? ? ? ? ? ? 0 days 0 hr. 0 min. 0 sec
Trace Level? ? ? ? ? ? ? off
Security? ? ? ? ? ? ? ? ? ON: Local OS Authentication
SNMP? ? ? ? ? ? ? ? ? ? ? OFF
Listener Parameter File? /opt/oracle/11g/network/admin/listener.ora
Listener Log File? ? ? ? /opt/oracle/diag/tnslsnr/oracle/listener/alert/log.xml
Listening Endpoints Summary...
? (DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(KEY=EXTPROC1521)))
? (DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=127.0.0.1)(PORT=1521)))
The listener supports no services
The command completed successfully