如果我执行lsnrctl status，系统将显示
LSNRCTL for Linux: Version 12.1.0.2.0 - Production on 24-OCT-2018 17:41:30
Copyright (c) 1991, 2014, Oracle. All rights reserved.
Connecting to (ADDRESS=(PROTOCOL=tcp)(HOST=)(PORT=1521))
TNS-12541: TNS:no listener
TNS-12560: TNS:protocol adapter error
TNS-00511: No listener
Linux Error: 2: No such file or directory
在尝试显示lsnrctl start时，
LSNRCTL for Linux: Version 12.1.0.2.0 - Production on 24-OCT-2018 17:42:17
Copyright (c) 1991, 2014, Oracle. All rights reserved.
TNS-01106: Listener using listener name LISTENER has already been started
也在尝试lsnrctl stop时系统显示
LSNRCTL for Linux: Version 12.1.0.2.0 - Production on 24-OCT-2018 17:42:47
Copyright (c) 1991, 2014, Oracle. All rights reserved.
Connecting to (ADDRESS=(PROTOCOL=tcp)(HOST=)(PORT=1521))
TNS-12541: TNS:no listener
TNS-12560: TNS:protocol adapter error
TNS-00511: No listener
Linux Error: 2: No such file or directory
但是数据库已启动并正在运行。我想重新启动监听器。请帮助