# rhel

How to tune RHEL 9 performance using tuned profiles, sysctl parameters, CPU governors, NUMA topology, and memory settings — for database servers, web workloads, and latency-sensitive applications.

A practical guide to RHEL 9's subscription management — attaching entitlements, enabling the right repositories, creating local mirrors for air-gapped environments, and managing subscriptions at scale.

How to migrate existing CentOS 7/8 servers to Rocky Linux 8 or 9 using the migrate2rocky script — including pre-migration checks, the migration process itself, and post-migration validation steps.

Install, update, and manage packages across Ubuntu (apt), RHEL (dnf/yum), and SUSE (zypper) — repositories, GPG keys, version pinning, and automation.