{"id":"rhel9-boot-kernel-parameter-management","text":"RHEL 9 manages kernel boot parameters through `grubby` as the central tool: changing the default boot kernel (`--set-default`), persistently adding kernel arguments (`--update-kernel --args`), controlling CPU vulnerability mitigations (`mitigations=`), tuning crashkernel memory reservation (`crashkernel=size,high/low`), and emergency access via `rd.break` boot interrupt.","truth_value":"IN","source":"","source_url":"","source_hash":"","justifications":[],"dependents":[],"metadata":{},"explanation":{"steps":[{"node":"rhel9-boot-kernel-parameter-management","truth_value":"IN","reason":"premise"}]}}