Oracle监听启动时报TNS-00507问题

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Linux 系统中，启动 Oracle 监听的时候报如下错误：

[oracle@CentOS ~]$ lsnrctl start

LSNRCTL for Linux: Version 10.2.0.1.0 – Production on 17-APR-2010 00:25:22

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

Starting /u01/app/oracle/product/10.2.0/db_1/bin/tnslsnr: please wait…

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

经过检查，发现 hosts 文件，内容如下：

[root@centos ~]# cat /etc/hosts

# Do not remove the following line, or various programs
# that require network functionality will fail.
::1 localhost.localdomain localhost
192.168.19.219 centos

缺少了 127.0.0.1 localhost 行，加上这行后，如下所示，监听就可以正常启动了。

[root@centos ~]# cat /etc/hosts

# Do not remove the following line, or various programs
# that require network functionality will fail.
::1 localhost.localdomain localhost
127.0.0.1 localhost
192.168.19.219 centos

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