hyperdata.it – here we go again

2022-01-06

Certbot Renew Pain

Something’s been driving me mad the last few days… tl;dr : certbot certonly -vvv –debug-challenges –webroot -w /opt/lampp/htdocs -d hyperdata.it I can’t remember if I wrote this up anywhere, but I had a real nightmare getting HTTPS support working on this site. Until some kind soul pointed me to Let’s Encrypt. It still took a little while thanks to XAMPP...

Meta/Site Comments: 0

2021-12-05

Drawing a logo in Logo

I intend to make a video on this, but I’ve not played with screen recording, things to learn. But I will need some kind of chronology so a rough write-up before I forget. Code is over here. If you can do me a better version – any language – I will be made happy. I watch so many YouTube videos...

Coding/Multimedia Comments: 0

2021-11-28

Global Artificial Life

Caveat : I am very prone to approaching research & experimentation back to front. I’ll have an idea on something I know little about and without doing much/any searching of the literature (Web) I’ll start implementing blindly. In my defence, it’s not always obvious what terms to search for without having a play. Without exception the idea will have been...

Coding Comments: 0

2021-11-14

Javascript Templating

Text templating/substitution (also known as string interpolation) is really nice to have. I’ve found this very useful in Javascript when building simple browser apps that call a SPARQL server. In fact I recently wrote this up as a paper, with a couple of little demos, proposing a pattern I call Sparql Diamonds. However, I missed a trick. I used the...

Coding Comments: 0

2021-11-13

Upgrading to Ubuntu 21.10, Impish Indri

Apparently an Indri is a kind of lemur. I’d already done the upgrade on a couple of other machines without any problem, decided it was time for it on my main (office desktop) box. This time there were issues – it said it hadn’t completed. But keeping going at apt upgrade (and whatever else it suggested) without rebooting got there...

Meta Comments: 0

2021-11-09

How to do a Mashup (YouTube Download)

Note to self – write script On Ubuntu 21.10 – youtube-dl -F https://www.youtube.com/watch?v=j7vxHOCeiQ4 [youtube] j7vxHOCeiQ4: Downloading webpage [info] Available formats for j7vxHOCeiQ4: format code extension resolution note 249 webm audio only tiny 52k , webm_dash container, opus @ 52k (48000Hz), 1.69MiB 250 webm audio only tiny 69k , webm_dash container, opus @ 69k (48000Hz), 2.22MiB 140 m4a audio only tiny...

Uncategorized Comments: 0

2021-11-09

Possible Esolang

Some thoughts on an esolang so I don’t forget An esoteric programming language (sometimes shortened to esolang) is a programming language designed to test the boundaries of computer programming language design, as a proof of concept, as software art, as a hacking interface to another language (particularly functional programming or procedural programming languages), or as a joke. Wikipedia There’s a...

Coding Comments: 0

2021-10-29

Gouge Error

I set up a little workshop here initially for practical reasons, house renovation. But I’ve always enjoyed playing with wood, especially carving. When I saw a lathe in a local shop at a very low price, I jumped at the chance. Ok, a cheap Chinese thing, but good enough for occasional use. That would have been about 15 years ago...

Woodwork Comments: 0

2021-10-22

Apache, symlinks, 403

tail -f /opt/lampp/logs/error_log I’m still in the process of setting things up on this server. Web stuff via Apache on Ubuntu. I’m moderately familiar with the Apache setup as it comes with the Ubuntu distro, but recently had cause to install Apache + MariaDB(≈MySQL) + WordPress on a local machine. I’d recently stumbled on XAMPP (≈LAMPP), effectively a bundle of...

Coding/Site Comments: 0

2021-10-11

Cheap Laptop Upgrade

Upgrading memory & hard drive in an Asus F507M laptop (with mostly-broken keyboard). A €300-ish machine made significantly more friendly with €70 of parts and a couple of hours work (mostly research). Some tips if you want to do something similar. Caveat: I use Ubuntu, no idea what might be different on other operating systems. Background A few years back...

Hardware/New Place Comments: 0