TNS-01106: Listener using listener name LISTENER has already been started

-- 啓動監聽,提示已經啓動.

[oracle@sh ~]$ lsnrctl start
LSNRCTL for Linux: Version 12.1.0.2.0 - Production on 06-FEB-2017 15:30:14
Copyright (c) 1991, 2014, Oracle.  All rights reserved.

TNS-01106: Listener using listener name LISTENER has already been started

-- 經過ps 命令沒有發現 監聽的進程

[root@sh ~]# ps -ef | grep -i tns
root        36     2  0 Jan26 ?        00:00:00 [netns]
root     14995 14824  0 15:30 pts/1    00:00:00 grep -i tns

-- 這個問題基本2個緣由致使, ：

1,  /etc/hosts 文件中的 ip和主機名不一致

2, listener.ora 中監聽主機非當前主機.