Decoded Node

PHP & Perl Web Development, and the Craft of Programming

Sunday, August 30, 2026

Using zerofree to reduce Ubuntu 26.04 (resolute) / Debian 14 (forky) OVA size

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This is an update of an older post , because the instructions there stopped working. Ubuntu 26.04 is the first LTS after Canonical switched...
Sunday, July 26, 2026

Using IPv4 for Outbound SMTP in Postfix

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I got a rejection notice from Microsoft Office 365.  My email couldn’t be delivered, they said, because it was on the Spamhaus malware-sourc...
Sunday, June 21, 2026

Defaults Aren’t Always Good

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I am responsible for a b2b system with a few dozen per-client settings, many of which are old and have defaults.  For instance, there is the...
Sunday, June 14, 2026

The Lock Wait Timeouts: MySQL’s SELECT … FOR UPDATE OF t1

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We had an issue with our busiest client, where some updates were failing with a “lock wait timeout."  These were updates of a single r...
Sunday, May 31, 2026

Fixing My SpamAssassin

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Since apparently February, my inbox has been under siege by various spam messages promising free stuff from recognizable brands, except that...
Sunday, May 24, 2026

Ubuntu Studio 26.04: We Can’t Have Nice Things

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Problem 1: KDE Plasma on Wayland retains the sticky-keys bug, where the latch state (press a modifier twice) is tracked, but doesn’t actual...
Wednesday, May 20, 2026

LLMs Are an Inside Threat

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There was another “my LLM deleted production” incident ( via ).  In this particular case, the agent trawled the filesystem to locate anothe...
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