当显示侦听器状态时，如何强制oracle 11g侦听器以txt格式而不是log.xml显示txt格式的listener.log路径？预先感谢。
oracle@esmd:~> lsnrctl
LSNRCTL for Linux: Version 11.2.0.3.0 - Production on 17-JAN-2020 09:05:51
Copyright (c) 1991, 2011, Oracle. All rights reserved.
Welcome to LSNRCTL, type "help" for information.
LSNRCTL> show trc_directory
Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=yyyy.xxx.zzz)(PORT=1521)))
LISTENER parameter "trc_directory" set to /oracle/diag/tnslsnr/esmd/listener/trace
The command completed successfully
LSNRCTL> exit
oracle@esmd:~> ls -l /oracle/diag/tnslsnr/esmd/listener/trace
total 1112632
-rw-r----- 1 oracle oinstall 1138215020 2020-01-17 09:07 listener.log
oracle@esmd:~>
[oracle@yyyyyyyy ~]$ lsnrctl
LSNRCTL for Linux: Version 11.2.0.4.0 - Production on 17-JAN-2020 06:14:37
Copyright (c) 1991, 2013, Oracle. All rights reserved.
Welcome to LSNRCTL, type "help" for information.
LSNRCTL> show trc_dir
Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=yyyyyyyyyyyy)(PORT=1521)))
LISTENER parameter "trc_directory" set to /opt/ora/app/oracle/diag/tnslsnr/yyyyyyyyyyyy/listener/trace
The command completed successfully
LSNRCTL> exit
[oracle@yyyyyyyyyyy ~]$ ls -l /opt/ora/app/oracle/diag/tnslsnr/yyyyyyyyyyy/listener/trace
total 341740
-rw-r----- 1 oracle oinstall 349654982 Jan 17 06:15 listener.log
[oracle@yyyyyyyyyyy ~]$