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John Goerzen

Goodreads Author

Website

http://changelog.complete.org/

Member Since

March 2009

URL

https://www.goodreads.com/jgoerzen

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454 posts
John Goerzen's Blog

A Mail Delivery Mystery: Exim, systemd, setuid, and Docker, oh my!

On mail.quux, a node of NNCPNET (the NNCP-based peer-to-peer email network), I started noticing emails not being delivered. They were all in the queue, frozen, and Exim’s log had entries like:

unable to set gid=5001 or uid=5001 (euid=100): local delivery to [redacted] transport=nncp

Weird.

Stranger still, when I manually ran the queue with sendmail -qff -v, they all delivered fine.

Huh.

Well, I thought

Combine Editions
John Goerzen’s books

Average rating: 3.93 · 1,025 ratings · 45 reviews · 16 distinct works

	Real World Haskell by Bryan O'Sullivan (Goodreads Author), John Goerzen (Goodreads Author), Donald Bruce Stewart 3.94 avg rating — 943 ratings — published 2008 — 13 editions	Error rating book. Refresh and try again. Rate this book Clear rating 1 of 5 stars 2 of 5 stars 3 of 5 stars 4 of 5 stars 5 of 5 stars
	Foundations of Python Network Programming by John Goerzen (Goodreads Author), Martin Streicher (Editor) 3.71 avg rating — 76 ratings — published 2004 — 14 editions	Error rating book. Refresh and try again. Rate this book Clear rating 1 of 5 stars 2 of 5 stars 3 of 5 stars 4 of 5 stars 5 of 5 stars
	Foundations of Python Network Programming by Brandon Rhodes, John Goerzen (Goodreads Author) 3.48 avg rating — 21 ratings — published 2014 — 7 editions	Error rating book. Refresh and try again. Rate this book Clear rating 1 of 5 stars 2 of 5 stars 3 of 5 stars 4 of 5 stars 5 of 5 stars
	Linux? Programming Bible 3.73 avg rating — 15 ratings — published 2000 — 2 editions	Error rating book. Refresh and try again. Rate this book Clear rating 1 of 5 stars 2 of 5 stars 3 of 5 stars 4 of 5 stars 5 of 5 stars
	Debian Gnu/Linux: Guide to Installation and Usage it was amazing 5.00 avg rating — 2 ratings — published 1999 — 3 editions	Error rating book. Refresh and try again. Rate this book Clear rating 1 of 5 stars 2 of 5 stars 3 of 5 stars 4 of 5 stars 5 of 5 stars
	Linux, le guide du développeur 0.00 avg rating — 0 ratings	Error rating book. Refresh and try again. Rate this book Clear rating 1 of 5 stars 2 of 5 stars 3 of 5 stars 4 of 5 stars 5 of 5 stars
	LinuxÃ‚ Programming Bible by John Goerzen (2000-03-22) 0.00 avg rating — 0 ratings	Error rating book. Refresh and try again. Rate this book Clear rating 1 of 5 stars 2 of 5 stars 3 of 5 stars 4 of 5 stars 5 of 5 stars
	Foundations of Python Network Programming: The comprehensive guide to building network applications with Python (Books for Professionals by Professionals) by Goerzen, John Published by Apress 2nd (second) edition (2010) Paperback 0.00 avg rating — 0 ratings — 2 editions	Error rating book. Refresh and try again. Rate this book Clear rating 1 of 5 stars 2 of 5 stars 3 of 5 stars 4 of 5 stars 5 of 5 stars
	Debian GNU/Linux - Guide to Installation and Usage 0.00 avg rating — 0 ratings	Error rating book. Refresh and try again. Rate this book Clear rating 1 of 5 stars 2 of 5 stars 3 of 5 stars 4 of 5 stars 5 of 5 stars
	Foundations of Python Network Programming: The comprehensive guide to building network applications with Python by John Goerzen (Goodreads Author), Tim Bower, Brandon Rhodes 0.00 avg rating — 0 ratings	Error rating book. Refresh and try again. Rate this book Clear rating 1 of 5 stars 2 of 5 stars 3 of 5 stars 4 of 5 stars 5 of 5 stars

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John is Currently Reading

John is currently reading

Surfing on the Internet

by J.C. Herz (Goodreads Author)

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May 28, 2023 12:02PM

John is currently reading

UNIX: A History and a Memoir

by Brian W. Kernighan

bookshelves: own, currently-reading

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May 28, 2023 12:02PM

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Floppy Disk Fever: The Curious Afterlives of a Flexible Medium

by Niek Hilkmann

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May 28, 2023 11:55AM

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John Goerzen wrote a new blog post A Mail Delivery Mystery: Exim, systemd, setuid, and Docker, oh my! On mail.quux, a node of NNCPNET (the NNCP-based peer-to-peer email network), I started noticing emails not being delivered. They were all in the queue Read more of this blog post »
Oct 11, 2025 12:02AM · like
John wants to read The Ministry of Time by Kaliane Bradley	Error rating book. Refresh and try again. Rate this book Clear rating 1 of 5 stars 2 of 5 stars 3 of 5 stars 4 of 5 stars 5 of 5 stars
Jan 15, 2025 12:17PM · like · preview book See a Problem? We’d love your help. Let us know what’s wrong with this preview of The Ministry of Time by Kaliane Bradley. Problem: Details (if other): Thanks for telling us about the problem. Not the book you’re looking for? Preview — The Ministry of Time by Kaliane Bradley <iframe sandbox id="wrongBookKindlePreviewScreen">
John entered a giveaway Poirot Investigates: A Hercule Poirot Story Collection by Agatha Christie	Error rating book. Refresh and try again. Rate this book Clear rating 1 of 5 stars 2 of 5 stars 3 of 5 stars 4 of 5 stars 5 of 5 stars
Sep 02, 2024 06:13AM · like · see giveaway · preview book See a Problem? We’d love your help. Let us know what’s wrong with this preview of Poirot Investigates by Agatha Christie. Problem: Details (if other): Thanks for telling us about the problem. Not the book you’re looking for? Preview — Poirot Investigates by Agatha Christie <iframe sandbox id="wrongBookKindlePreviewScreen">
John wants to read The Mosquito Coast by Paul Theroux	Error rating book. Refresh and try again. Rate this book Clear rating 1 of 5 stars 2 of 5 stars 3 of 5 stars 4 of 5 stars 5 of 5 stars
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John wants to read Inherent Vice by Thomas Pynchon	Error rating book. Refresh and try again. Rate this book Clear rating 1 of 5 stars 2 of 5 stars 3 of 5 stars 4 of 5 stars 5 of 5 stars
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John’s Quotes

“Laughter is the shortest distance between two people.”
― Victor Borge

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“You have to write the book that wants to be written. And if the book will be too difficult for grown-ups, then you write it for children.”
― Madeleine L'Engle

tags: books, children, difficult, grown-ups, write, writers, writing

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