Oracle monitoring error tns-01189 [How to Solve]

[[email protected] ~]$ lsnrctl start
LSNRCTL for Linux: Version 12.1.0.2.0 – Production on 04-Nov-2021 15:30:14
Copyright © 1991, 2014, Oracle. All rights reserved.
TNS-01106: Listener using listener name LISTENER has already been started
– The ps command did not find the listening process
[[email protected] ~]# 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
– Check the listening status, error reported; TNS-01189
[[email protected] ~]$ lsnrctl status
LSNRCTL for Linux: Version 12.1.0.2.0 – Production on 4-NOV-2021 15:57:39
Copyright © 1991, 2014, Oracle. All rights reserved.
Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=hello)(PORT=1521)))
TNS-01189: The listener could not authenticate the user
– There are basically 2 reasons for this problem,
1, the ip and hostname in /etc/hosts file are not the same
2, the listener.ora listener host is not the current host.
After checking, the listener.ora listener host is incorrectly filled in
LISTENER =
(DESCRIPTION_LIST =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = TCP)(HOST = hellow)(PORT = 1521))
)
(DESCRIPTION =
(ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC1521))
)
)
After changing to the current host name, restart the listener to resume normal.

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