Systemd Config Merges: Avoiding Silent Shadowing with Drop-ins on Fedora 43
How systemd merges unit files and drop-ins on Fedora 43, why changes get silently shadowed or wiped, and how to verify the merged config.
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4 posts
Firewall Zone Persistence: Why firewalld Runtime Changes Vanish and How to Pin Them
firewalld runtime changes disappear on reload or reconnect, and NetworkManager can override zone bindings. Here's how to make firewall zones persist.
Trust the Tailnet, Not the Network: Automating Wi-Fi Hardening with NetworkManager Dispatchers
Treat every Wi-Fi network as hostile: a NetworkManager dispatcher that pins a locked-down firewalld zone and forces a Tailscale exit node on connect.
Systemd-tmpfiles vs Plex: When /tmp Aging Breaks EAC3 Transcoding
Why long-running Plex servers suddenly fail EAC3 transcodes with exit code 187, and how a tmpfiles.d exclusion rule fixes it permanently.