With the emergence of Oracle Linux, I thought that one annoying part of the setup environment to be unnecessary, but ... I was wrong. :-)
We need to edit multiple files, create user, groups, and with each new version of Oracle, this section remains roughly the same.
So over time I made/find/edit/copy/paste/change/supplement a folowing script, it should be run as root, and after that everything is ready for the "runInstaller".
The script in this form meets my needs for fast setting environment, but, of course, everyone can still extend and customize.
Here is a script: