Uncheck I wish to receive security updates via My Oracle Support and click Next.
Select Skip software updates and click Next.
Select Install database software only and click Next.
Click Next to accept the default language selection.
Select Enterprise Edition and click Next.
Oracle Base: /btrfs/u01
Software location: /btrfs/u01/product/12.1.0/dbhome_1
Review the installation summary, optionally save a response file, and click Install.