Archive, whatever I tried . Hello world, and everyone . RHEL initial settings to Virtual Machines ( external ) Java binary install OpenJDK with alternatives Oracle Cloud Infrastructure create "Always Free tier" compute instance ( A1.Flex ) using Oracle Autonomous Database on Spring boot [WiP] PostgreSQL install Oracle FDW install MySQL FDW SSL Certificate with Let's Encrypt DNS challenge with Cloudflare ( also Azure DNS ) on mod_md ( external ) Apache web server enable tp TLSv1.3 on RHEL(7/)8/9 ( RPM ) ( RPM branch ) License the work is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License .