1在安装oracle前，我添加固定IP和主机名时不小心删除了127.0.0.1 localhost.localdomain localhost，不过装完oracle软件和数据库instance还是能起来，但是当我需要用到tnsping的时候就出现问题，监听错误，然后我去查看监听发现如下问题：

[oracle@yao]$ lsnrctl status

LSNRCTL for Linux: Version 10.2.0.1.0 - Production on 31-MAY-2010 11:19:38

Copyright (c) 1991, 2005, Oracle. All rights reserved.

Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=IPC)(KEY=EXTPROC1)))
TNS-12541: TNS:no listener
TNS-12560: TNS:protocol adapter error
TNS-00511: No listener
Linux Error: 2: No such file or directory
Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=172.16.4.181)(PORT=1521)))
TNS-12541: TNS:no listener
TNS-12560: TNS:protocol adapter error
TNS-00511: No listener
Linux Error: 111: Connection refused

打开监听时出现如下错误：

[oracle@yao]$ lsnrctl start

LSNRCTL for Linux: Version 10.2.0.4.0 - Production on 20-MAR-2009 05:33:19

Copyright (c) 1991, 2007, Oracle. All rights reserved.

Starting /oracle/product/10.2.0/bin/tnslsnr: please wait...

TNS-12537: TNS:connection closed
TNS-12560: TNS:protocol adapter error
TNS-00507: Connection closed
Linux Error: 29: Illegal seek

网上搜索下，是我在/etc/hosts里删除了localhost的原因

解决方法：

vi /etc/hosts

添加如下：

127.0.0.1 localhost.localdomain localhost
就可以了

2 使用xmanger 3.0通过ssh协议远程访问主机时产生如下错误

[9:35:12] Sent password.
[9:35:12] Access granted.
[9:35:12] Sent X11 forwarding request...
[9:35:12] Succeeded.
[9:35:12] Sent the command line.
[9:35:12] /usr/X11R6/bin/xterm -ls -display $DISPLAY
[9:35:12] Start timer (TIMER_SHUTDOWN, 180).
_X11TransSocketINETConnect() can't get address for localhost:6010: Name or service not known
/usr/X11R6/bin/xterm Xt error: Can't open display: localhost:10.0

添加127.0.0.1 localhost.localdomain localhost
就可以通过xmanger 来ssh登录

ITPub博客

删除127.0.0.1 localhost.localdomain localhost出现的错误

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