-bash-3.1$ lsnrctl start  ######启动监听器报错 LSNRCTL for Linux: Version 10.2.0.4.0 - Production on 09-JUL-2010 02:03:46 Copyright (c) 1991, 2007, Oracle.  All rights reserved. Starting /oracle/product/10.2.0/db_1/bin/tnslsnr: please wait... TNSLSNR for Linux: Version 10.2.0.4.0 - Production
Log messages written to /oracle/product/10.2.0/db_1/network/log/listener.log
Listening on: (DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=localhost.localdomain)(PORT=1521))) Connecting to (ADDRESS=(PROTOCOL=tcp)(HOST=)(PORT=1521))
TNS-12560: TNS:protocol adapter error
 TNS-00530: Protocol adapter error
  Linux Error: 113: No route to host #####注意这行   -bash-3.1$ more /etc/hosts  ###查看对应文件
# Do not remove the following line, or various programs
# that require network functionality will fail.
192.168.125.2   localhost.localdomain
-bash-3.1$ su - root ####切到root，修改以上文件
Password:
[root@localhost ~]# vi /etc/hosts       # Do not remove the following line, or various programs
# that require network functionality will fail.
192.168.125.3   localhost.localdomain
~ "/etc/hosts" 3L, 141C written
[root@localhost ~]# more /etc/sysconfig/network ###查看所有与主机名相关的文件
NETWORKING=yes
NETWORKING_IPV6=yes
HOSTNAME=localhost.localdomain
[root@localhost ~]# exit
logout -bash-3.1$ lsnrctl start  #######再次启动仍报错，看来问题不在这儿,但报错与上面不一样了，有点进步 LSNRCTL for Linux: Version 10.2.0.4.0 - Production on 09-JUL-2010 02:04:31 Copyright (c) 1991, 2007, Oracle.  All rights reserved. Starting /oracle/product/10.2.0/db_1/bin/tnslsnr: please wait... TNSLSNR for Linux: Version 10.2.0.4.0 - Production
Log messages written to /oracle/product/10.2.0/db_1/network/log/listener.log
Listening on: (DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=localhost.localdomain)(PORT=1521))) Connecting to (ADDRESS=(PROTOCOL=tcp)(HOST=)(PORT=1521))
TNS-12547: TNS:lost contact
 TNS-12560: TNS:protocol adapter error
  TNS-00517: Lost contact
   Linux Error: 104: Connection reset by peer      
[root@localhost ~]# vi /etc/hosts  ###########查了点网上资料，改成这样，保留原来的127.0.0.1原有行（安装系统本身就有的记录，新添加一行：真实ip) # Do not remove the following line, or various programs
# that require network functionality will fail.
127.0.0.1       localhost.localdomain   localhost
192.168.125.3   localhost.localdomain
~ "/etc/hosts" 4L, 184C written
[root@localhost ~]# exit
logout -bash-3.1$ lsnrctl start  #####再次启动监听器好了 LSNRCTL for Linux: Version 10.2.0.4.0 - Production on 09-JUL-2010 02:09:10 Copyright (c) 1991, 2007, Oracle.  All rights reserved. Starting /oracle/product/10.2.0/db_1/bin/tnslsnr: please wait... TNSLSNR for Linux: Version 10.2.0.4.0 - Production
Log messages written to /oracle/product/10.2.0/db_1/network/log/listener.log
Listening on: (DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=localhost.localdomain)(PORT=1521))) Connecting to (ADDRESS=(PROTOCOL=tcp)(HOST=)(PORT=1521))
STATUS of the LISTENER
------------------------
Alias                     LISTENER
Version                   TNSLSNR for Linux: Version 10.2.0.4.0 - Production
Start Date                09-JUL-2010 02:09:10
Uptime                    0 days 0 hr. 0 min. 0 sec
Trace Level               off
Security                  ON: Local OS Authentication
SNMP                      OFF
Listener Log File         /oracle/product/10.2.0/db_1/network/log/listener.log
Listening Endpoints Summary...
  (DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=localhost.localdomain)(PORT=1521)))
The listener supports no services  
小结：
     oracle监听器启动与redhat的主机配置文件有密切关系
     主机配置文件有影响关系，自己理解不到位，有空学习下