How to install Oracle Database 11g R2 on CentOS 7 Minimal (Core) with Xming X Server and Putty.

https://www.uxora.com/oracle/dba/23-oracle-installation-errors-and-fixes

https://oracle-base.com/articles/11g/oracle-db-11gr2-installation-on-oracle-linux-7

download
1. 11g from https://www.oracle.com/technetwork/database/enterprise-edition/downloads/112010-linx8664soft-100572.html

2. CentOS 7 minimal from
http://isoredirect.centos.org/centos/7/isos/x86_64/CentOS-7-x86_64-Minimal-1804.iso

3. putty from
https://www.chiark.greenend.org.uk/~sgtatham/putty/latest.html

4. xming x server from
https://sourceforge.net/projects/xming/