连接 DG Broker： ## 主库执行 [oracle@lucifer:~]$ dgmgrl sys/oracle DGMGRL for Linux: Release 19.0.0.0.0 - Production on Tue Mar 21 11:13:15 2023 Version 19.18.0.0.0 Copyright (c) 1982, 2019, Oracle and/or its affiliates. All rights reserved. Welcome to DGMGRL, type "help" for information. Connected to "oradb" Connected as SYSDBA. DGMGRL>