Oracle 12c DB QuickStart for Ubuntu 16.04 Xenial
The Linked Tutorial Shows You Step-by-step How-to Install and Getting-Started with on Ubuntu 16.04 Xenial LTS Amd64 GNU / Linux.
Included on the Guide You find also the Links to Download the Oracle 12c Database for Ubuntu Linux.
Installing Oracle 12c Database for Ubuntu 16.04 Xenial
Oracle 12c DB Installation on Ubuntu 16.04 Xenial LTS Amd64