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    <description>Field notes on Linux, networking and distributed systems.</description>
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      <title>Debugging packet loss without tcpdump</title>
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      <pubDate>Fri, 14 Aug 2026 09:00:00 +0000</pubDate>
      <description>Retransmit counters, socket state and a few ss flags usually locate the problem before a capture is worth taking.</description>
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      <title>A practical look at TCP autotuning</title>
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      <pubDate>Thu, 02 Jul 2026 09:00:00 +0000</pubDate>
      <description>What the Linux kernel changes on its own, what it will not change for you, and the two sysctls that matter most.</description>
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      <title>Running your own DNS resolver</title>
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      <pubDate>Thu, 21 May 2026 09:00:00 +0000</pubDate>
      <description>A local recursive resolver is cheap and useful — until it becomes a single point of failure.</description>
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      <title>Backups: the 3-2-1 rule in practice</title>
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      <pubDate>Mon, 09 Mar 2026 09:00:00 +0000</pubDate>
      <description>Most backup systems fail at restore time, not backup time. A short checklist that survives real incidents.</description>
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