风哥Oracle RAC+DG生产实战（1）：Oracle19c for RHEL8安装配置+补丁
入配置中，并重新读取。
vim /u01/app/oracle/product/11.2.0/xe/network/admin/listener.ora# listener.ora Network Configuration File:
SID_LIST_LISTENER =
(SID_LIST =
(SID_DESC =
(SID_NAME = PLSExtProc)
(ORACLE_HOME = /u01/app/oracle/product/11.2.0/xe)
(PROGRAM = extproc)
)
(SID_DESC=
(GLOBAL_DBNAME = XE1) # 增加server_name XE1
(ORALCE_HOME = /u01/app/oracle/product/11.2.0/xe
