Remove bogus DNS from eth0/eth1 network configs#40
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setup_sensor_connection() was creating .ssh/config as root instead of pi user, causing later operations (github-hamma key setup) to fail with permission denied. Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
Rewrote CLAUDE.md (project status + rules) and KNOWLEDGE.md (repo-specific dev reference). Deleted DEVELOPMENT_NOTES.md, MASTER_PLAN.md, and SCRIPT_COMPARISON.md — content absorbed into KNOWLEDGE.md and the new ~/.claude/hamma-system.md operational reference. Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
eth0 connects to the HAMMA sensor instrument (10.10.10.1) and eth1 is a local service port — neither runs a DNS server. When sensor carrier comes up, systemd-resolved registers 10.10.10.1 as a DNS server and overwrites the good carrier DNS from udhcpc, breaking name resolution on cellular units. Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
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Summary
DNS=10.10.10.1fromfiles/40-eth0.network— the sensor instrument is not a DNS serverDNS=192.168.1.1fromfiles/30-eth1.network— the local service port has no DNS serverProblem
On cellular sensors, DNS resolution breaks when the HAMMA sensor gets connected. The sequence:
10.10.10.1(from eth0 config) as a DNS server50_bring_wwan0_up.pydoesn't fix it because its ping check (8.8.8.8) still passeswwan0 can't contribute DNS because it's
Unmanaged=yes, so eth0's bogus entry becomes the only DNS server.Test plan
resolvectl statusno longer shows DNS on eth0/eth1🤖 Generated with Claude Code