TNS-12547和TNS-12555错误解决

解決Oracle启动监听时错误

一、TNS-12547：

 

TNS-12547: TNS:lost contact
 TNS-12560: TNS:protocol adapter error
  TNS-00517: Lost contact
   Linux Error: 104: Connection reset by peer

  

 

 

发现/etc/hosts中并没有127.0.0.1 localhost.

修改/etc/hosts,修改后如下
$ cat /etc/hosts
# Do not remove the following line, or various programs
# that require network functionality will fail.
127.0.0.1 localhost

 

二、TNS-12555：

 

TNS-12555: TNS:permission denied
TNS-12560: TNS:protocol adapter error
TNS-00525: Insufficient privilege for operation
Linux Error: 1: Operation not permitted

 

 

解决如下：

# chmod 777 /var/tmp/.oracle

  原因分析：Oracle卸载不干净，导致/var/tmp/.oracle目录权限不足，故而报错。