Author: etbe

Worthless Questions at Lectures

I’ve previously blogged about the productive length of questions at lectures [1]. But it seems to me that worthless questions can be recognised before the person asking even gets properly started. Here is a list of ways of recognising them: Appeal to authority. If someone tells you about their job or other qualifications before asking […]

Lecture

Free Short Stories

Here are some free short science-fiction stories that I enjoyed reading: Maneki Neko by Bruce Sterling is an interesting story about a networked gift economy, I’d like to join such a network! The Exterminator’s Want Ad by Bruce Sterling is another good story about the gift economy, not as positive as Maneki Neki though. Barge […]

Fiction

ASD Self-Diagnosis Tests

Here are some online psychological tests that can be used as part of an Autism Spectrum Disorder (ASD) self-diagnosis. Simon Baron-Cohen is well known for his research into Autism, some of it is quite controversial (particularly the “Extreme Male Brain” theory which is widely rejected in the Autism community). There are some interesting tests based […]

Aspie

Some Suggestions for Parents of Aspies

I’ve had a couple of parents ask me for advice about children with Asperger Syndrome (AS), in one case a child who was formally diagnosed and in another case a child who is suspected of being an Aspie but who hasn’t been assessed. I don’t claim to be an expert on these things, but based […]

Aspie

Memlockd

Memlockd is a daemon that locks files into memory. Then if a machine starts paging heavily the chance of being able to login successfully is significantly increased. The default configuration will lock all the files needed for login to a Debian GNU/Linux system via the console or via ssh. memlockd_1.2.tar.gz – better systemd support, and […]

Projects

Free Books

Here are some free books that I have downloaded and read: Cory Doctorow’s book Eastern Standard Tribe was the first novel I read on my computer. His other novels are linked here. The novelette A Colder War by Charles Stross is really good. The novel Accelerando by Charles Stross is very well written and has […]

Fiction

Computer Power Use

This table shows the power consumption of some of the computers I own. I use a domestic electricity meter that was certified for use in billing customers to measure this. Any inaccuracies in the measurement will correspond to inaccuracies in electricity bills of people who use such computers. Before anyone asks, I am not interested […]

environment

Postal

This is a program I wrote to benchmark SMTP servers. I started work on this because I need to know which mail server will give the best performance with more than 1,000,000 users. I have decided to release it under the GPL because there is no benefit in keeping the source secret, and the world […]

Projects

How to Debug POP

POP (Post Office Protocol) is the most used protocol for receiving mail from a server to a MUA (Mail User Agent) for reading. It is specified in RFC1939. But the way it works (in most cases) is quite simple and doesn’t require reading the RFC, connect to port 110 (the standard port for POP3) and […]

Internet

How to Debug SMTP with TLS(SSL) and AUTH

The first thing to test is a TLS (aka SSL) connection. The stunnel program has special code for this, the command “stunnel -n smtp -c -r mail.example.com:25” will connect to the server via SMTP and negotiate SSL. If you use gnutls then the command “gnutls-cli -s mail.example.com -p 25” will connect to the server, allow […]

Internet