Primary DNS Migration Checklist for CentOS 7 to Oracle Linux 9
Sep 29, 2026
Mariusz Antonik
Networking
7 min read
A primary DNS migration from CentOS 7 to Oracle Linux 9 needs more than copying named.conf and zone files. This checklist explains how to validate zones, troubleshoot DNSSEC DS signature errors, plan the shared-IP cutover, and monitor service health after the move. It gives developers and small business owners a practical path for safer DNS changes without another dashboard to watch.
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