cat /etc/hosts 我没有配置DNS 直接通过 hosts文件解析的
oracle@m2 ~]$ cat /etc/hosts
# Do not remove the following line, or various programs
# that require network functionality will fail.
127.0.0.1 localhost.localdomain localhost
::1 localhost6.localdomain6 localhost6
我现在只能在一台m1上
alter system set remote_linstener='rac-scan:1521' sid='*"
假如 在m2上
alter system set remote_linstener='rac-scan:1521' sid='*"
那么
sqlplus mhz/mhz@172.16.15.100:1521/mes
则会报错