oracle 18c 安装报ora-12754问题的解决

目前oracle发布的18c，只能安装在云上，如果我们安装在自己机器上，使用dbca创建实例时，会报ora-12754的错误，有办法解决没有呢?
答案是肯定的，有两种办法，一是上oracle 云上拷贝libserver18.a文件来解决，二是，直接修改参数_exadata_feature_on=true，之后，也可以启动:

Instead of changing lib file one can get the database running as follows -
1. instead of creating database using dbca， use dbca to get the scripts.
2. there will be 3 init* files. Modify all of them just place _exadata_feature_on=true.
3. execute xxxx.sh script to run and build database.

后面应该很快应该就有本地的安装介质出来，我选择了后者来解决.

SQL> select banner from v$version;
BANNER

Oracle Database 18c Enterprise Edition Release 18.0.0.0.0 - Production

然后，开启防火墙，就可以访问了.

[[email protected]desktop0 ~]# firewall-cmd --permanent --add-port=5501/tcp
success
[[email protected] ~]# firewall-cmd --permanent --add-port=1521/tcp
success
[[email protected] ~]# firewall-cmd --reload
success
[[email protected]desktop0 ~]# firewall-cmd --list-all
public （active）
target: default
icmp-block-inversion: no
interfaces: ens33
sources:
services: ssh dhcpv6-client
ports: 5501/tcp 1521/tcp
protocols:
masquerade: no
forward-ports:
source-ports:
icmp-blocks:
rich rules:

以上测试在centos 7.4上通过.