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Tune the dnf Main Config

RHEL / Red Hat · medium · solved in-browser (no VM needed) · 3 tiered hints

Write /etc/dnf/dnf.conf with a [main] section that keeps only the 3 most recent installonly kernels (installonly_limit=3), enables parallel downloads (max_parallel_downloads=10), and enforces signature checking globally (gpgcheck=1). (Authored config, graded structurally — the engine isn't run here.)

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