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  AT A GLANCE DIMENSION ● ORACLE LINUX ● RHEL Base Cost FREE (no subscription required) downloadable from -  https://yum.oracle.com/oracle-linux-downloads.html Paid subscription required https://www.redhat.com/en/technologies/linux-platforms/enterprise-linux Standard Support Duration 10 years (Premier + Basic) https://www.oracle.com/in/linux/support/ 10 years (Full + Maintenance) Extended Support Available (additional cost) ELS Add-On or ELC Premium (14 yrs) Point Release EOL Policy Immediate EOL when next minor arrives EUS/EEUS pins minor releases 2–4 yrs Default Kernel UEK (upstream mainline-based) RHCK (conservative backport) Current Major Version OL 10 (UEK8 — kernel 6.12 LTS) RHEL 10 (kernel 6.12) Source Mod...

  Overview and Scope This runbook provides a step-by-step procedure for building and hardening Oracle Linux 8, 9, and 10 servers across any virtualization or cloud platform. This runbook applies a CIS Level 1-aligned hardening baseline for Oracle Linux 8/9/10, with documented exceptions where strict CIS controls conflict with Oracle Database, Grid Infrastructure, or middleware operational requirements. Final compliance must be validated with the applicable CIS benchmark version and a scanner such as CIS-CAT or OpenSCAP. Design Principles •        Every change is logged to /var/log/hardening/changes.log with timestamp, original value, and new value. •        A pre-hardening snapshot of all modified files is taken so any individual change can be rolled back. •        CIS controls that conflict with Oracle Database kernel, network, or security requirements are explicitly skipped with just...