Topical Takes
Short, opinionated posts on eBPF, Linux internals, and the tools we all run in production.
How to Let an AI Agent Troubleshoot Your Network on Linux in 2026: Give It the Wire, Not the Dashboard
Agentic NetOps products from NetBrain, Cisco and Selector reason over telemetry a device already exported, and a Wireshark MCP server needs a capture that was running when the failure hit. Here is what an agent has to be able to read to find a reset, a stale DNS answer or a failed handshake on a Linux host, and how yeet lets it read the wire from the kernel without a shell or root.
Who Is Resetting My TCP Connections on Linux? (2026)
Every guide to connection reset by peer ends at the same place: run tcpdump and read the source address of the RST. That gives you an IP, not a cause. Here is how to find which process owned the reset socket on Linux, tell a peer reset apart from a kernel one, and watch resets live without a capture file.