Status : Failure -Test failed: IO Error: The Network Adapter could not establish the connection解决办法:
启动监听器时[oracle@localhost ~]$lsntctl start 出现The listener supports no services
Linux命令行运行 [oracle@localhost bin]$ netmgr 打开Oracle Net Manager,添加Database Service ,name设置为ORCL即可
完成后重新启动监听,再重新连接,问题解决。