是因为在连接的时候使用了ip，使用hostname则没有这个问题
[crsusr@slcz01db04 bin]$ ./sqlplus "system/aug@10.242.3.72:1521/augpdb10010_srv_20200708"
SQL*Plus: Release 21.0.0.0.0 - Development on Sun Jul 12 21:07:46 2020
Version 21.1.0.0.0
Copyright (c) 1982, 2020, Oracle. All rights reserved.
ERROR:
ORA-12541: TNS:no listener
[crsusr@slcz01db04 bin]$ ./sqlplus "system/aug@slcz01db04:1521/augpdb10010_srv_20200708"
SQL*Plus: Release 21.0.0.0.0 - Development on Sun Jul 12 21:07:32 2020
Version 21.1.0.0.0
Copyright (c) 1982, 2020, Oracle. All rights reserved.
Last Successful login time: Sun Jul 12 2020 21:07:17 -06:00
Connected to:
Oracle Database 21c Enterprise Edition Release 21.0.0.0.0 - Development
Version 21.1.0.0.0
SQL> exit
本文地址：https://blog.csdn.net/wgz7747147820/article/details/107313131
